A new comprehensive model of damage for flexural subassemblies prone to fatigue. (November 2021)

• Record Type: Journal Article
• Authors: Bai, Yongtao; Nardi, Deborah C.; Zhou, Xuhong; Picón, Ricardo A.; Flórez-López, Julio
• Is Part Of: Computers & structures. Volume 256(2021)
• Publication Date: 2021-11
• Subjects: Engineering sciences -- Steel structures -- Fatigue failure -- Crack propagation -- Damage mechanics; Structural engineering -- Data processing -- Periodicals; Electronic data processing -- Structures, Theory of -- Periodicals; 624.171
• DOI: 10.1016/j.compstruc.2021.106639
• Languages: English
• ISSNs: 0045-7949

Abstract

Highlights: Predicting fatigue damage is a challenge because of complexity of crack localization. We develop a general damage model for predicting the elasto-plastic fatigue life. A new perspective is inspired for fatigue damage life-cycle of steel structures. Abstract: Fatigue resistance is a key performance for the life-cycle sustainability of materials and structures. Structural members subjected to flexural forces such as spring hinges in origami structures are one of the most commonly existing in nature and engineering practice but predicting their fatigue resistance is a challenge because of complex mechanisms of crack localization, nonstationary amplitudes in the time domain, and the influence of stress gradient due to bending moment. We developed a general lumped damage simulation model for predicting the fatigue life and the associated crack propagation in the full range of elastic and plastic amplitudes. It is found that the developed comprehensive damage model demonstrates a new perspective for fatigue-induced remaining life quantification for engineering structures.