A. Varvani-Farahani

A. Varvani-Farahani

Ryerson University

H-index: 24

North America-Canada

About A. Varvani-Farahani

A. Varvani-Farahani, With an exceptional h-index of 24 and a recent h-index of 19 (since 2020), a distinguished researcher at Ryerson University, specializes in the field of Fatigue Fracture, Cyclic plasticity, Ratcheting, Composites, Biomechanics.

His recent articles reflect a diverse array of research interests and contributions to the field:

Ratcheting prediction of stainless steel 304 and 316L samples undergoing asymmetric loading cycles at elevated temperatures incorporating dynamic strain aging phenomenon

Ratcheting–Fatigue Damage Assessment of Additively Manufactured SS304L and AlSi10Mg Samples under Asymmetric Stress Cycles

Ratcheting assessment of additively manufactured alloys through the hardening framework: Analysis and simulation

Ratcheting evaluation of additively manufactured 4043 aluminum samples through a combined isotropic–kinematic hardening framework

Accumulation of plastic strain at notch root of steel specimens undergoing asymmetric fatigue cycles: Analysis and simulation

Ratcheting Simulation of Additively Manufactured Aluminum 4043 Samples through Finite Element Analysis

Ratcheting response and boundary of austenitic stainless steel in a pressurized straight pipe subjected to in-plane bending cycles

Local Ratcheting at the Notch Region of Non-Press-Fitted and Press-Fitted Al 7075-T6 Samples Undergoing Asymmetric Stress Cycles

A. Varvani-Farahani Information

University

Ryerson University

Position

Professor

Citations(all)

2472

Citations(since 2020)

1354

Cited By

1521

hIndex(all)

24

hIndex(since 2020)

19

i10Index(all)

65

i10Index(since 2020)

38

Email

University Profile Page

Ryerson University

A. Varvani-Farahani Skills & Research Interests

Fatigue Fracture

Cyclic plasticity

Ratcheting

Composites

Biomechanics

Top articles of A. Varvani-Farahani

Ratcheting prediction of stainless steel 304 and 316L samples undergoing asymmetric loading cycles at elevated temperatures incorporating dynamic strain aging phenomenon

Authors

M Karimi,A Varvani-Farahani

Journal

Materials Today Communications

Published Date

2024/3/1

The present study intends to assess the plastic strain accumulation in austenitic stainless steel 304 and 316 L samples undergoing uniaxial loading cycles at elevated temperatures incorporating the dynamic strain aging (DSA) phenomenon. The DSA function was adapted into the dynamic recovery term of the Ahmadzadeh-Varvani (A-V) kinematic hardening rule to address the accumulated plastic strain (ratcheting strain) of steel samples at elevated temperature ranges where materials show a negative strain rate sensitivity. The range of temperature at which stainless steel samples manifested DSA event was evidenced between 573 K and 900 K. At this temperature range, the interaction of solute atoms with dislocations resulted in an elevation in materials strength. The evolution of yield strength at various temperatures was calibrated with a multi-variable function developed earlier by the Voyiadjis-Song-Rusinek …

Ratcheting–Fatigue Damage Assessment of Additively Manufactured SS304L and AlSi10Mg Samples under Asymmetric Stress Cycles

Authors

M Servatan,SM Hashemi,A Varvani-Farahani

Journal

Metals

Published Date

2023/8/30

The present study aims to investigate the interaction of ratcheting and fatigue phenomena for additively manufactured (AM) samples of SS304L and AlSi10Mg undergoing uniaxial asymmetric stress cycles. Overall damage was accumulated through fatigue and ratcheting on AM samples prepared from three-dimensional-printed plates along vertical and horizontal directions. Fatigue damage was evaluated based on the strain energy density fatigue approach and ratcheting damage was calculated through use of an isotropic–kinematic hardening framework. The isotropic description through the Lee–Zavrel (L–Z) model formed the initial and concentric expansion of yield surfaces while the Ahmadzadeh–Varvani (A–V) kinematic hardening rule translated yield surfaces into the deviatoric stress space. Ratcheting of AM samples was simulated using finite element analysis through use of triangular and quadrilateral elements. Ratcheting values of the AM samples were simulated on the basis of Chaboche’s materials model. The predicted and simulated ratcheting damage curves placed above the experimental fatigue–ratcheting experimental data while predicted fatigue damage curves collapsed below the measured values. The overall damage was formulated to partition damage weights due to fatigue and ratcheting phenomena.

Ratcheting assessment of additively manufactured alloys through the hardening framework: Analysis and simulation

Authors

M Servatan,SM Hashemi,A Varvani-Farahani

Journal

Materials Today Communications

Published Date

2023/6/1

The present study intends to evaluate the ratcheting response of the additively manufactured (AM) samples made of Al 4043, SS316L, and Ti–6Al–4V alloy through hardening rules and finite element analysis. The hardening framework consisted of Ahmadzadeh‐Varvani (A-V) kinematic hardening rule and an isotropic hardening description by Lee-Zavrel (L-Z). Yield surface evolution was evaluated for (i) AM samples taken from mid and top sections of the 3D printed plate, and (ii) heat-treated samples. The Chaboche’s materials model was employed to assess ratcheting of AM samples through use of finite element method. The choice of hardening models affected yield surface translations over the loading process. The predicted and simulated ratcheting curves were found in close agreements falling below those of measured values.

Ratcheting evaluation of additively manufactured 4043 aluminum samples through a combined isotropic–kinematic hardening framework

Authors

M Servatan,SM Hashemi,A Varvani-Farahani

Journal

Progress in Additive Manufacturing

Published Date

2023/6

The present study evaluated the ratcheting behavior of additive manufactured 4043 aluminum alloy by coupling the Ahmadzadeh–Varvani (A–V) kinematic hardening rule with the isotropic hardening rule of Lee–Zaverl (L–Z). The L–Z description expanded the yield surface while the A–V model translated yield surface in deviatoric stress space. Materials coefficients Q and b in the L–Z model were, respectively, determined to address expansion of yield surface and its rate. Coefficients C and in the A–V model were determined through consistency condition at which predicted hysteresis loops coincided with those experimentally obtained. The coefficient was determined from the close agreement of the predicted and measured ratcheting strain data plotted over loading cycles. Increments of backstress were plotted versus stress cycles demonstrating a gradual decay as the number of stress cycles increased …

Accumulation of plastic strain at notch root of steel specimens undergoing asymmetric fatigue cycles: Analysis and simulation

Authors

Faezeh Hatami,Ahmad Varvani-Farahani

Journal

Materials

Published Date

2023/3/7

The present study evaluates the ratcheting response at notch roots of 1045 steel specimens experiencing uniaxial asymmetric fatigue cycles. Local stress and strain components at the notch root were analytically evaluated through the use of Neuber, Glinka, and Hoffman-Seeger (H-S) rules coupled with the Ahmadzadeh-Varvani (A-V) kinematic hardening model. Backstress promotion through coupled kinematic hardening model with the Hoffman-Seeger, Neuber, and Glinka rules was studied. Relaxation in local stresses on the notched samples as hysteresis loops moved forward with plastic strain accumulation during asymmetric loading cycles was observed. Local ratcheting results were simulated through FE analysis, where the Chaboche model was employed as the materials hardening rule. A consistent response of the ratcheting values was evidenced as predicted, and simulated results were compared with the measured ratcheting data.

Ratcheting Simulation of Additively Manufactured Aluminum 4043 Samples through Finite Element Analysis

Authors

M Servatan,SM Hashemi,A Varvani-Farahani

Journal

Applied Sciences

Published Date

2023/10/22

This study presents a finite element-based ratcheting assessment of additively manufactured aluminum 4043 samples undergoing asymmetric loading cycles. The Chaboche material model in ANSYS was utilized and the effects of mesh and element type were examined. Different element numbers were used in a thorough convergence study to obtain independent meshing structures. The coefficients of this model were defined through stress–strain hysteresis loops determined from the strain-controlled tests. The backstress evolution and the corresponding yield surface translation in the deviatoric stress space were discussed as three different mesh elements of linear brick, quadratic tetrahedron, and quadratic brick were adopted. The magnitude of backstress was affected as different element types were employed. The first-order brick elements resulted in the highest backstress increments, while the lowest backstresses were determined when quadratic brick elements were taken. Backstress increments are positioned in an intermediate level with the use of quadratic tetrahedron elements. The choice of the element type, shape, and number influenced material ratcheting response over the loading process. The use of quadratic brick elements elevated the simulated ratcheting curves. The quadratic tetrahedron and linear brick elements, however, suppressed ratcheting level as compared with those of experimental data. The closeness of the simulated ratcheting results to those of the measured values was found to be highly dependent on these finite element variables.

Ratcheting response and boundary of austenitic stainless steel in a pressurized straight pipe subjected to in-plane bending cycles

Authors

Yusong Tian,Xiaohui Chen,Tianxiang Chen,Lin Zhu,Ahmad Varvani-Farahani

Journal

International Journal of Pressure Vessels and Piping

Published Date

2023/2/1

Ratcheting behavior of pressurized straight pipes made of Z2CND18.10 austenitic stainless steel alloy was evaluated under in-plane bending cycles and under displacement- and force-controlled conditions by means of the Ahmadzadeh-Varvani (A-V) kinematic hardening rule. Ratcheting tests were conducted on straight pressurized steel pipes under bending cycles. Ratcheting response of steel pipes was also numerically simulated through inclusion of the A-V framework into ABAQUS software. The simulated ratcheting results along the axial and circumferential directions were found in good agreement with those of experimental values in the pressurized steel pipes. It was found that variables including the magnitude of internal pressure, cyclic bending moments, loading spectra, material properties, and FE element types, size and numbers noticeably impacted simulated ratcheting values. Ratcheting boundaries …

Local Ratcheting at the Notch Region of Non-Press-Fitted and Press-Fitted Al 7075-T6 Samples Undergoing Asymmetric Stress Cycles

Authors

F Hatami,A Varvani-Farahani

Journal

Metals

Published Date

2023/9/2

The present study evaluated the ratcheting response of notched and press-fitted Al 7075-T6 specimens under stress-controlled asymmetric cycles. The degree of the interference fit (DIF) directly influenced the magnitude and the rate of progressive plastic strain at the notch edge region. Local ratcheting at the hole–pin interference region was analyzed by means of two kinematic-hardening rules—the Ahmadzadeh–Varvani (A–V) rule and the Chaboche rule—coupled with the Neuber rule. Ratcheting strains at the notch root of aluminum samples with DIF = 0 (non-press-fitting samples) were measured and found to be the highest in magnitude. For the press-fitted samples, however, ratcheting strains dropped noticeably as the DIF increased from 1% to 2%. The press-fitting process plastically deformed the perimeter edges of the notches and improved the materials strength locally at the notch edges, resulting in better resistance against ratcheting progress. Local ratcheting strains at distances of 0.5, 1.3, and 3.0 mm from the notch roots were predicted for both pinned and unpinned samples via the hardening rules and were compared with those of measured ratcheting values. The ratcheting curves predicted by means of the A-V and Chaboche hardening rules closely agreed with the experimental data. The predicted ratcheting curves were positioned, respectively, above and below the measured ratcheting data.

The effect of the friction stir welding tool shape on tensile properties of welded Al 6061-T6 joints

Authors

S Hassanifard,A Ghiasvand,SM Hashemi,A Varvani-Farahani

Journal

Materials Today Communications

Published Date

2022/6/1

This study employs various Friction Stir Welding (FSW) tools to investigate mechanical properties of Al 6061-T6 joints. Welding tools were cut to form one-sided conical shape pin with a groove to enable material flow in the stirred zone over welding passes. Weld joints were made through six different FSW tool shapes. One-sided conical shape pins consisted of different cone angles 0º (simple cylinder pin), 5º, 10º, 15º, 20º, and 25º. Tensile tests were then carried out to evaluate elastic modulus, ultimate tensile strength, and elongation of joint samples. Measured hardness values and grain sizes within weld regions were affected by the welding tool shape. Tensile properties of aluminum joint samples were improved as cone angle increased from 0º to 20º through different welding tools. This was attributed to excess of plastic flow evolution over the weld zones during welding operation. Beyond cone angle of 20º …

Department of Mechanical and Industrial Engineering, Ryerson University, Toronto, ON, Canada

Authors

A Varvani-Farahani

Journal

Cyclic Plasticity of Metals

Published Date

2022

Machinery components and structures in service such as landing gears and parts in the piping industry, pressure vessels, and power plant reactors are continuously subjected to complex stress cycles at which the plastic strain results in deformation and damage, leading to catastrophic failures. To examine and characterize materials, an efficient elastic–plastic analysis of materials is an imperative step for a reliable design of severely loaded components when the stress level exceeds the yield limit. Cyclic hardening and softening of materials are reported to occur over the first 10–1000 cycles before materials are cyclically stabilized [1]. The evolution mechanism of yield surface/s is governed through the transition by kinematic hardening models or/and expansion/contraction by isotropic hardening rules. The isotropic hardening descriptions have elaborated to the evolution of the yield surface over the first few loading cycles. These models preclude to account for cyclic phenomena: Bauschinger’s effect, stress relaxation, and ratcheting. Among earlier researchers, Lee and Zaverl [2] first introduced a function to describe the yield surface evolution over plastic strain accumulation. Through experimental investigation, Chaboche et al.[3] highlighted that isotropic descriptions are yet to competently predict material cyclic hardening/softening response. They further introduced an internal variable to account for the influence of a prior largest plastic strain. The internal variable was developed on the basis of a hypersphere in the plastic strain space, defined as the nonhardening region by Ohno [4], where no isotropic hardening occurred. Kang et al.[5] made an …

Nonlinear kinematic hardening cyclic plasticity

Authors

A Varvani-Farahani

Published Date

2022/1/1

The theory of plasticity and materials constitutive equations are essential to characterize the response of metallic alloys undergoing various loading conditions. Kinematic hardening rules are to establish the governing equations over a loading process. This chapter aims to review kinematic hardening rules based on uncoupled multisurface hardening rules, as well as coupled kinematic hardening rules through von Mises yield criterion, incorporating yield surface distortion, hardening models in conjunction with continuum damage mechanics, kinematic hardening models adopted at notch roots, and hardening models through description of crystal plasticity. A special attention is paid to the coupled kinematic hardening rules, the influencing terms, and parameters in the structure of hardening models including materials time-dependency, viscoplasticity, temperature in the presence of stress raisers and notches. The …

Ratcheting response of SS316 steel samples with different notch shapes under various loading spectra

Authors

A Shekarian,A Varvani-Farahani

Journal

Journal of Materials Engineering and Performance

Published Date

2021/5

Ratcheting response of notched 316 stainless steel samples was examined under various low-high-high (LHH) and high-low-low (HLL) loading steps and sequences. Plate samples were tested under uniaxial asymmetric stress cycles contained circular or elliptical notches in center. Local ratcheting strain increased over loading steps of steel samples tested with LHH loading sequence, while it dropped in magnitude for samples tested with HLL loading histories. Local ratcheting strains were further evaluated through use of the Ahmadzadeh–Varvani (A–V) and Chaboche (CH) hardening models coupled with Neuber’s rule to predict ratcheting at the vicinity of notch root in steel samples. Finite element (FE) method was employed to numerically assess local ratcheting around the notch root through the use of ABAQUS software. Horizontal X-ellipse, circular and vertical Y-ellipse notch shapes lead to the …

RATCHETING EVALUATION OF BIOLOGICAL TISSUES OVER ASYMMETRIC LOADING CYCLES

Authors

MS HASHEMI,A VARVANI-FARAHANI

Journal

Journal of Mechanics in Medicine and Biology

Published Date

2021/9/15

This study intends to evaluate the ratcheting response of biological samples prepared from bovine and porcine trabecular bone, articular cartilage, meniscus, and skin tissues and tested under asymmetric (nonzero mean stress) cycles. Meniscus and skin samples were tested with stress ratios of and , respectively, while other tissues were tested at . Experimental ratcheting data and related influential parameters including stress level, stress rate, and testing frequency were discussed. A parametric ratcheting equation was further calibrated to estimate the ratcheting response of tissues. The predicted ratcheting data were found to be in close agreement with the reported experimental data.

Monotonic and fatigue response of heat-treated friction stir welded Al 6061-T6 joints: Testing and characterization

Authors

S Hassanifard,A Nabavi-Kivi,A Ghiasvand,A Varvani-Farahani

Journal

Materials Performance and Characterization

Published Date

2021/4/23

The present study evaluates the influence of post-weld heat treatment on the fatigue strength of friction stir welded aluminum 6061-T6 joints. The solution-treatment artificial aging (STA) was applied to the friction stir welding samples prior to cyclic tests. Hardness distributions along the centerline of the welded specimens as well as the tensile properties and microstructural features were initially examined. The stress-controlled cyclic tests were then conducted at constant amplitude loading with the load ratio of R = 0.1. Experimental results revealed that tensile strength of STA heat-treated samples increased 73 % as compared to the as-welded (AW) joints. Furthermore, the STA heat-treated specimens experienced 28 % higher elongation than those of AW samples. A 3D finite element analysis was developed to (i) simulate residual stress distribution of the welded joints after heat treatment processing and (ii …

Nondestructive characterization of laser powder bed fusion components using high-frequency phased array ultrasonic testing

Authors

Farhang Honarvar,Sagar Patel,Mihaela Vlasea,Hossein Amini,Ahmad Varvani-Farahani

Journal

Journal of Materials Engineering and Performance

Published Date

2021/9

The use of metal additive manufacturing (AM) technologies is growing rapidly in many industries owing to their ability to produce complex designs, to light-weight critical components, and to consolidate assemblies. Laser powder bed fusion (LPBF) is a metal AM technology that offers finer feature resolution when compared with other metal AM technologies, with ongoing challenges in controlling the process to guarantee defect-free parts. Manufacturing of end-use products via LPBF with a high degree of internal feature design complexity results in an increased demand for demonstrating the performance of various nondestructive evaluation (NDE) tools. In this work, the use of high-frequency (50 MHz) phased array ultrasonic testing (PAUT) for the nondestructive evaluation of a cubic AlSi10Mg sample manufactured by the LPBF process is demonstrated. Artificial internal features with various sizes and shapes are …

Fatigue response of friction stir welded joints of Al 6061 in the absence and presence of inserted copper foils in the butt weld

Authors

S Hassanifard,H Alipour,A Ghiasvand,A Varvani-Farahani

Journal

Journal of Manufacturing Processes

Published Date

2021/4/1

The present study examines the impact of inserted copper foil on n mechanical characteristics and fatigue strength of aluminum 6061 butt joints welded through the Friction Stir Welding (FSW) process. Thin copper foils were inserted between the faying surfaces of the sheet joints alloying Al 6061 locally with copper foil over FSW operation. Test specimens were then cut off from the welded plates to examine the quasi-static and fatigue behavior of the joints. The load-controlled condition tests were conducted on the specimens with a stress ratio of R= 0.1. Insertion of copper foils of 100 μ m and 200 μ m in the stirred zones, improved tensile strengths respectively 48% and 31%. The fatigue life of alloyed joints was improved as compared to as-welded joints in the absence of foils. A three-dimensional finite element (FE) analysis was employed to simulate the maximum stress and strain values in the weld zones. Weld …

Ratcheting examination of 1045 notched steel plates under Low-High and High-Low sequences

Authors

K Kolasangiani,M Shariati,A Varvani-Farahani

Journal

Journal of Testing and Evaluation

Published Date

2021/9/1

The present study examines the ratcheting response of 1045 notched steel plates undergoing uniaxial step-loading cycles. Loading steps were applied with different Low-High and High-Low sequences. Ratcheting tests were conducted on notched samples, and average local strains were measured with the use of strain gauges mounted in the vicinity of notch roots. Measured ratcheting strains near notch roots were found as high as 10 times those of tests conducted on unnotched samples. The magnitude of applied cyclic load as well as notch diameter influenced local ratcheting strain at the vicinity of the notch root. The lower nominal load level over the first step in the Low-High sequence substantially promoted ratcheting magnitude over subsequent loading steps with higher load magnitudes. In the High-Low loading sequence, the previous load step with higher magnitude retarded the local accumulated …

A Comparative Study on Fatigue Response of Aluminum Alloy Friction Stir Welded Joints at Various Post-Processing and Treatments

Authors

Soran Hassanifard,Ahmad Varvani-Farahani

Journal

Journal of Manufacturing and Materials Processing

Published Date

2021/8/20

The present study examines the fatigue of friction stir welded (FSW) aluminum 6061, 7075, 1060 joints followed by (i) in situ and sequential rolling (SR) processes, (ii) plastic burnishing (iii) solution-treatment artificial aging (STA), (iv) local alloying through depositing thin copper foils, and (v) inserting alumina powder in the weld nugget zone (NZ). The microstructural features and fatigue life of post-processed joints were compared with those of as-welded joints. The in situ rolling technique offered simultaneous rolling and welding operations of aluminum joints, while through the sequential rolling process, the top surface of FSW joints was rolled after the welding process. The fatigue life of in situ rolled samples was increased as the ball diameter of welding tool increased. The fatigue life of friction stir welded joints after a low-plasticity burnishing process was noticeably promoted. The addition of 1 wt.% alumina in the NZ of joints resulted in a significant elevation on fatigue life of friction stir spot welded joints, while an increase in alumina powder to 2.5 wt.% adversely affected fatigue strength. Weld NZ was alloyed through the insertion of copper foils between the faying surfaces of joints. This localized alloy slightly improved the fatigue life of joints; however, its effects on fatigue life were not as influential as STA heat-treated or in situ rolled joints. The microstructure of weld joints was highly affected through post-processing and treatments, resulting in a substantial influence on the fatigue response of FSW aluminum joints.

Ratcheting behavior of notched stainless steel samples subjected to asymmetric loading cycles

Authors

A Shekarian,A Varvani-Farahani

Journal

Journal of Iron and Steel Research International

Published Date

2021/1

The ratcheting response of 316 stainless steel samples at the vicinity of notch roots under single- and multi-step loading conditions is evaluated. Multi-step tests were conducted to examine local ratcheting at different low–high–high and high–low–low loading sequences. The stress levels over loading steps and their sequences highly influenced ratcheting magnitude and rate. The change of stress level from low to high promoted ratcheting over proceeding cycles while ratcheting strains dropped in magnitude for opposing sequence where stress level dropped from high to low. Local ratcheting strain values at the vicinity of notch root were found noticeably larger than nominal ratcheting values measured at farer distances from notch edge through use of strain gauges. Ratcheting values in both mediums of local and nominal were promoted as notch diameter increased. To assess progressive ratcheting …

High frequency phased array ultrasonic testing of thermoplastic tensile specimens manufactured by fused filament fabrication with embedded defects

Authors

K Fayazbakhsh,F Honarvar,H Amini,A Varvani-Farahani

Journal

Additive Manufacturing

Published Date

2021/11/1

Fused filament fabrication (FFF) is a popular additive manufacturing process used for fabrication of polymeric components. In this paper, defects are intentionally designed and induced in FFF 3D printed tensile specimens made from polylactic acid (PLA) per ASTM D638-14. Each fabricated sample consists of 24 layers and has a quasi-isotropic layup of [45/0/90/–45]3s. The defects (gaps) are in the form of 5, 7, 9 and 11 adjacent missing extrudates in the 10th layer, which has a 0° raster angle. Five specimens per each gap width, including no gap as the baseline, are 3D printed for a total of 25 specimens. The specimens are first scanned by high-frequency phased array ultrasonic testing (PAUT) and their layups are then accurately captured. This is the first time such high-resolution images are prepared from individual layers of 3D printed parts fabricated by FFF process. The as-manufactured gap widths are found to …

See List of Professors in A. Varvani-Farahani University(Ryerson University)

A. Varvani-Farahani FAQs

What is A. Varvani-Farahani's h-index at Ryerson University?

The h-index of A. Varvani-Farahani has been 19 since 2020 and 24 in total.

What are A. Varvani-Farahani's top articles?

The articles with the titles of

Ratcheting prediction of stainless steel 304 and 316L samples undergoing asymmetric loading cycles at elevated temperatures incorporating dynamic strain aging phenomenon

Ratcheting–Fatigue Damage Assessment of Additively Manufactured SS304L and AlSi10Mg Samples under Asymmetric Stress Cycles

Ratcheting assessment of additively manufactured alloys through the hardening framework: Analysis and simulation

Ratcheting evaluation of additively manufactured 4043 aluminum samples through a combined isotropic–kinematic hardening framework

Accumulation of plastic strain at notch root of steel specimens undergoing asymmetric fatigue cycles: Analysis and simulation

Ratcheting Simulation of Additively Manufactured Aluminum 4043 Samples through Finite Element Analysis

Ratcheting response and boundary of austenitic stainless steel in a pressurized straight pipe subjected to in-plane bending cycles

Local Ratcheting at the Notch Region of Non-Press-Fitted and Press-Fitted Al 7075-T6 Samples Undergoing Asymmetric Stress Cycles

...

are the top articles of A. Varvani-Farahani at Ryerson University.

What are A. Varvani-Farahani's research interests?

The research interests of A. Varvani-Farahani are: Fatigue Fracture, Cyclic plasticity, Ratcheting, Composites, Biomechanics

What is A. Varvani-Farahani's total number of citations?

A. Varvani-Farahani has 2,472 citations in total.

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