Han Jiang, Southwest Jiaotong University

Qingyuan Wang, Chengdu University

Guozheng Kang, , Southwest Jiaotong University

Yongjie Liu, Sichuan University

Cyclic deformation, a very common deformation mode encountered in many engineering applications, can be categorized into three groups, i.e. high-cycle fatigue which generally occurs under conditions of overall elastic deformation, low-cycle fatigue in which the applied stress is high enough for significant local plastic deformation to occur and, finally, ratcheting under a non-zero mean stress which normally causes an accumulation of plastic deformation during cyclic loading. These categorizations are important factors in the safety assessment and life estimation in such engineering areas as pressure vessels, piping, rolling contact between wheel and tracks, fastening technology and sealing technology. Over the last several decades, researchers from the areas of mechanics, material science and mechanical engineering have explored various aspects of ratcheting, fatigue behavior and their coupling in various materials; including not only the traditional alloys of steel and aluminum, but also engineering materials such as shape memory alloy, polymers and composites. The resulting theories and technologies have changed the way that engineers and designers think about cyclic loading/deformation and have enabled many possible new applications. Experimental observations have been made of cyclic deformation, fatigue, fatigue-ratcheting. Both macroscopic and micromechanical constitutive models have been constructed to allow prediction of the progressive deformation of materials undergoing cyclic deformation. There remain significant challenges in describing the complicated deformation behavior of engineering materials with reasonable accuracy. The field of mechanics plays a key role in the understanding, description and prediction of more complex cyclic deformation behavior by assisting in identifying the underlying deformation mechanisms and establishing guidelines for experiment/design/manufacture. This symposium aims to forge increased interactions among active researchers from academia and from industries working with the theories of cyclic deformation and their applications in fatigue analysis for engineering materials. Presentation topics include but are not limited to: 1. Experiment investigations of cyclic deformation and fatigue behavior of engineering materials; 2. Constitutive modeling for cyclic deformation and fatigue behavior; 3. Numerical modeling of cyclic deformation and fatigue behavior; 4. Fatigue-ratcheting interaction.

Keywords: manufacture, solids and structure