Plasticity and Fatigue

About

The FATSLab team also explores fatigue and plasticity of non-Mg and non-cold sprayed materials. Multiaxial fatigue, weldments, and cyclic plasticity are among the topics covered.

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).

Weldments

Characterization and analysis of welds between metals.

References

Journal Publications

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 ductility 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.

Conference Proceedings

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).

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."