Plasticity and Fatigue

About

The FATSLab team looks at material properties, namely the mechanical behaviour of materials under cyclic loading. Examples of our research involve uni- and multiaxial fatigue, weldments, and cyclic plasticity.

Multiaxial Fatigue

Uniaxial and multiaxial fatigue of non-Mg and non-cold sprayed materials.

References

Journal Publications

Matsuda K., dos Santos E., Assuncao P.C., Jahed H., Gerlich A.P., "Fatigue Strength of Wire Arc Additive Manufactured Nano-Particle Enhanced AA7075 Material," Fatigue & Fracture of Engineering Materials & Structures (2025).

Faria J.J.R., Fonseca L.G.A., de Faria A.R., Cantisano A., Cunha T.N., Jahed H., Montesano J., "Determination of the fatigue behavior of mechanical components through infrared thermography," Engineering Failure Analysis, 134 (2022) 106018

Noban M., Jahed H., Ibrahim E., Ince A., "Load path sensitivity and fatigue life estimation of 30CrNiMo8HH," International Journal of Fatigue, 37 (2012) 123-133.

Noban M., Jahed H., Winkler S., Ince A., "Fatigue characterization and modeling of 30CrNiMo8HH under multiaxial loading," Materials Science and Engineering: A, 528 (2011) 2484-2494.

Jahed H., Noban M., "Fatigue of Electroformed Nickel," Journal of Failure Analysis and Prevention, 9 (2009) 549-557.

Jahed H., Varvani-Farahani A., Noban M., Khalaji I., "An energy-based fatigue life assessment model for various metallic materials under proportional and non-proportional loading conditions," International Journal of Fatigue, 29 (2007) 647-655.

Jahed H., Varvani-Farahani A., "Upper and lower fatigue life limits model using energy-based fatigue properties," International Journal of Fatigue, 28 (2006) 467-473.

Conference Proceedings

Ghazimorady S., Negarandeh S., Chen Y., Morafegh M., Kantere V., Jahed H., "X-ray diffraction-based estimation of remaining fatigue life in AA6061-T6 for “additive remanufacturing®”," Proceedings of the Holistic Innovation in Additive Manufacturing (HI-AM) Conference, Vol. 1, No. 1 (2025).

Graphical Abstracts and Figures

Post fatigue test cracking and damage details from sample study on joints

"Multiaxial Fatigue Behavior of AA6016 and AA6016 to DX54D SPR Joints: Fracture Mechanisms and Data-Driven Rupp's Model". DOI: 10.1111/ffe.70306

Processes that lead to final adhesion joint of the coating Al/Mg

"Dissimilar Resistance Spot Weld of Ni-Coated Aluminum to Ni-Coated Magnesium Using Cold Spray Coating Technology". DOI: 10.3390/met15090940

Schematic of cold spray deposition process (a), the FSW set-up (b) and locations for tensile and metallographic samples sectioning (c)

"Enhancing metallurgical and mechanical properties of friction stir butt welded joints of Al–Cu via cold sprayed Ni interlayer". DOI: 10.1016/j.msea.2021.140992

Post fatigue test cracking and damage details from sample study on joints
1 / 3
"Multiaxial Fatigue Behavior of AA6016 and AA6016 to DX54D SPR Joints: Fracture Mechanisms and Data-Driven Rupp's Model". DOI: 10.1111/ffe.70306
Processes that lead to final adhesion joint of the coating Al/Mg
2 / 3
"Dissimilar Resistance Spot Weld of Ni-Coated Aluminum to Ni-Coated Magnesium Using Cold Spray Coating Technology". DOI: 10.3390/met15090940
Schematic of cold spray deposition process (a), the FSW set-up (b) and locations for tensile and metallographic samples sectioning (c)
3 / 3
"Enhancing metallurgical and mechanical properties of friction stir butt welded joints of Al–Cu via cold sprayed Ni interlayer". DOI: 10.1016/j.msea.2021.140992

Weldments

Characterization and analysis of welds between metals.

References

Journal Publications

Woo A., Malpot A., Behravesh B., Rezaee S., Anousheh A., Jahed H., "Multiaxial Fatigue Behavior of AA6016 and AA6016 to DX54D SPR Joints: Fracture Mechanisms and Data-Driven Rupp's Model," Fatigue & Fracture of Engineering Materials & Structures (2026).

Oheil M., Saha D., Jahed H., Gerlich A., "Dissimilar Resistance Spot Weld of Ni-Coated Aluminum to Ni-Coated Magnesium Using Cold Spray Coating Technology," Metals, 15 (2025) 940.

Hou W., Shen Z., Huda N., Oheil M., Shen Y., Jahed H., Gerlich A.P., "Enhancing metallurgical and mechanical properties of friction stir butt welded joints of Al–Cu via cold sprayed Ni interlayer," Materials Science & Engineering A, 809 (2021) 140992.

Hou W., Oheil M., Shen Z., Shen Y., Jahed H., Gerlich A., "Enhanced strength and ductulity in dissimilar friction stir butt welded Al/Cu joints by addition of a cold-spray Ni interlayer," Journal of Manufacturing Processes, 60 (2020) 573-577.

Khodabakhshi F., Marzbanrad B., Yazdanmehr A., Jahed H., Gerlich A.P., "Tailoring the residual stress during two-step cold gas spraying and friction-stir surface integration of titanium coating," Surface & Coatings Technology, 380 (2019) 125008.

Khodabakhshi F., Marzbanrad B., Shah L.H., Jahed H., Gerlich A.P., "Surface Modification of a Cold Gas Dynamic Spray-Deposited Titanium Coating on Aluminum Alloy by using Friction-Stir Processing," Journal of Thermal Spray Technology, 28 (2019) 1185–1198.

Khodabakhshi F., Marzbanrad B., Jahed H., Gerlich A.P., "Interfacial bonding mechanisms between aluminum and titanium during cold gas spraying followed by friction-stir modification," Applied Surface Science, 462 (2018) 739–752.

Khodabakhshi F., Marzbanrad B., Shah L.H., Jahed H., Gerlich A.P., "Friction-stir processing of a cold sprayed AA7075 coating layer on the AZ31B substrate: Structural homogeneity, microstructures and hardness," Surface & Coatings Technology, 331 (2017) 116–128.

Badarinarayan H., Behravesh S.B., Bhole S.D., Chen D.L., Grantham J., Horstemeyer M.F., Jahed H., Jordon J.B., Lambert S., Patel H.A., Su X., Yang Y., "Monotonic and Fatigue Behavior of Mg Alloy Friction Stir Spot Welds: An International Benchmark Test in the "Magnesium Front End Research and Development" Project," Magnesium Technology 2011, Springer International Publishing, Cham (2016) 629–634.

Behravesh S.B., Ibrahim E., Jahed H., "Fatigue failure analysis of welded structures: An overview and A case study," Handbook of Materials Failure Analysis with Case Studies from the Chemicals, Concrete and Power Industries, Butterworth-Heinemann (2016) 355-386.

Behravesh S.B., Jahed H., Lambert S., "Characterization of magnesium spot welds under tensile and cyclic loadings," Materials & Design, 32 (2011) 4890–4900.

Conference Proceedings

Oheil M., Jahed H., Gerlich A., "Fatigue of Cold Spray-Assisted Resistance Spot Welding of Aluminum to Magnesium," Proceedings of the Holistic Innovation in Additive Manufacturing (HI-AM) Conference, Vol. 1, No. 1 (2025).

Ko B.M., Gryguc A., Chen J., Hunt J., Guo M., Zhang W., Jahed H., Gerlich A., "Parameter Optimization and Characterization of Aluminum-Copper Laser Welded Joints," SAE Technical Paper 2024-01-2428 (2024).

Shaha S.K., Marzbanrad B., Jahed H., "Influence of Cold Spray on the Microstructure and Residual Stress of Resistance Spot Welded Steel-Mg," TMS 2018 147th Annual Meeting & Exhibition Supplemental Proceedings, Springer International Publishing, Cham (2018) 635–644.

Cyclic Plasticity

Permanent deformation of materials due to repeating, reversed loading.

Cyclic Plasticity of Metals

Front and back cover of Cyclic Plasticity of Metals, a book edited by Dr. Hamid Jahed and Ali Roostei

Published in 2022, Cyclic Plasticity of Metals: Modeling Fundamentals and Applications by Dr. Hamid Jahed and Dr. Ali A. Roostaei discusses the models and applications used in cyclic plasticity. As stated by Elsevier:

"Cyclic Plasticity of Metals: Modeling Fundamentals and Applications provides an exhaustive overview of the fundamentals and applications of various cyclic plasticity models including forming and spring back, notch analysis, fatigue life prediction, and more. Covering metals with an array of different structures, such as hexagonal close packed (HCP), face centered cubic (FCC), and body centered cubic (BCC), the book starts with an introduction to experimental macroscopic and microscopic observations of cyclic plasticity and then segues into a discussion of the fundamentals of the different cyclic plasticity models, covering topics such as kinematics, stress and strain tensors, elasticity, plastic flow rule, and an array of other concepts. A review of the available models follows, and the book concludes with chapters covering finite element implementation and industrial applications of the various models."

References

Journal Publications

Behravesh S.B., Lambert S., Jahed H., "A Constitutive Model for Asymmetric Cyclic Hysteresis of Wrought Magnesium Alloys under Variable Amplitude Loading," Metals, 14 (2024) 221.

Ling Y., Roostaei A.A., Glinka G., Jahed H., "Fatigue of ZEK100-F magnesium alloy: Characterisation and modelling," International Journal of Fatigue, 125 (2019) 179-186.

Roostaei A.A., Pahlevanpour A., Behravesh S.B., Jahed H., "On the definition of elastic strain energy density in fatigue modelling," International Journal of Fatigue, 121 (2019) 237-242.

Roostaei A.A., Jahed H., "A cyclic small-strain plasticity model for wrought Mg alloys under multiaxial loading: Numerical implementation and validation," International Journal of Mechanical Sciences, 145 (2018) 318-329.

Roostaei A.A., Jahed H., "Role of loading direction on cyclic behaviour characteristics of AM30 extrusion and its fatigue damage modelling," Materials Science & Engineering A, 670 (2016) 26-40.

Behravesh S.B., Jahed H., Lambert S.B., Mi C., "Constitutive Modeling for Cyclic Behavior of AZ31B Magnesium Alloy and its Application," Advanced Materials Research, 891-892 (2014) 809-814.

Noban M., Jahed H., Varvani-Farahani A., "The choice of cyclic plasticity models in fatigue life assessment of 304 and 1045 steel alloys based on the critical plane-energy fatigue damage approach," International Journal of Fatigue, 43 (2012) 217-225.

Noban M., Jahed H., Ibrahim E., Ince A., "Load path sensitivity and fatigue life estimation of 30CrNiMo8HH," International Journal of Fatigue, 37 (2012) 123-133.

Noban M., Jahed H., Winkler S., Ince A., "Fatigue characterization and modeling of 30CrNiMo8HH under multiaxial loading," Materials Science and Engineering: A, 528 (2011) 2484-2494.

Noban M., Albinmousa J., Jahed H., Lambert S., "A Continuum-Based Cyclic Plasticity Model for AZ31B Magnesium Alloy under Proportional loading," Procedia Engineering, 10 (2011) 1366-1371.

Jahed H., Varvani-Farahani A., Noban M., Khalaji I., "An energy-based fatigue life assessment model for various metallic materials under proportional and non-proportional loading conditions," International Journal of Fatigue, 29 (2007) 647-655.

Noban M., Jahed H., "Ratchetting strain prediction," International Journal of Pressure Vessels and Piping, 84 (2007) 223-233.

Conference Proceedings

Albinmousa J., Jahed H., Lambert S., "Estimation of Fatigue Crack Orientation using Critical Plane Parameters: An Experimental Investigation," 10th International Conference on Multiaxial Fatigue and Fracture (ICMFF10), Kyoto, Japan (2013).

Albinmousa J., Jahed H., Lambert S., "Multiaxial Fatigue Life Prediction of AZ31B Extrusion," The 23rd Canadian Congress of Applied Mechanics, Vancouver, BC, Canada (2011).

Khalaji I., Jahed H., Varvani A., Noban M., "Energy based life prediction model for non-proportional loading," 9th International Fatigue Congress, Atlanta, US (2006).

Jahed H., Noban M., "A Fast Method for Ratchetting Strain Prediction," Proceedings of the ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference, Vancouver, BC, Canada (2006).

Shahrooie S., Noban M., Jahed H., Ghafoori-Ahangar R., "A Cyclic Plasticity Model without Yield Surface," 15th Annual (International) Conference on Mechanical Engineering (ISME2007), Tehran, Iran (2007).