An anisotropic continuum damage model for high-cycle fatigue. Issue 16 (15th July 2021)

• Record Type: Journal Article
• Authors: Zhang, Liang; Gao, Zhenyuan; Haynes, Robert A.; Henry, Todd C.; Yu, Wenbin
• Is Part Of: Mechanics of advanced materials and structures. Volume 28:Issue 16(2021)
• Page Start: 1633
• Page End: 1647
• Publication Date: 2021-07-15
• Subjects: Stress-dependent -- tensile and compressive fatigue -- S–N curve -- concrete -- fiber-reinforced composite; Composite materials -- Mechanical properties -- Periodicals; Composite construction -- Periodicals; 620.118
• DOI: 10.1080/15376494.2019.1697472
• Languages: English
• ISSNs: 1537-6494

Abstract

Abstract: The objective of this paper is to develop an anisotropic continuum damage model for high-cycle fatigue. A viscodamage model, which can handle frequently observed brittle damage phenomena, is developed to produce stress-dependent fatigue damage evolution. The governing equation for damage evolution is derived using an incremental method. A closed-form incremental constitutive relation is derived at last. The present model is validated through model calibration via (1) cyclic compression tests on a concrete, (2) cyclic tensile tests on another concrete, and (3) cyclic tensile tests on a unidirectional IM7/8552 fiber-reinforced composite in its longitudinal and transverse directions, respectively. The present model is found to handle high-cycle anisotropic, different tensile and compressive fatigue well. It is also found feasible to calibrate a continuum damage model from S–N and modulus degradation/maximum strain–cycle curves. The present model can be conveniently implemented in an explicit finite element analyzer for the fatigue life prediction of engineering structures.