Journal
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
Volume 225, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijmecsci.2022.107356
Keywords
Microstructure modeling; elasto-plastic polygonal FEM; continuum damage mechanics; damage evolution law; LCF life
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Funding
- Defence Metallurgical Research Laboratory, Defence Research and Development Organization, Hyderabad [S & T/18-19/DMRL/DIR-8.02]
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This work investigates the influence of microstructure on the low cycle fatigue (LCF) life of two-phase titanium alloys. It proposes a new strain-based damage evolution law and statistically analyzes the effect of various microstructural parameters on the LCF life.
This work presents the influence of microstructure on the LCF life of two-phase titanium alloys. An elasto-plastic polygonal FEM and continuum damage mechanics approach has been used in this work. Damage coupled Chaboche-Lemaitre combined isotropic-kinematic hardening model is implemented to accurately capture the effects of deformation inhomogeneity and material plasticity. A new strain-based damage evolution law is proposed to predict the effect of mean grain size on the LCF life. The effect of different microstructural parameters i.e., topological variation, elastic anisotropy, mean grain size and shape, volume fraction of phases and initial voids is statistically analyzed on the LCF life.
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