A multi-scale corrosion fatigue damage model of high-strength bridge wires

Abstract

Cables are the most sensitive components in cable-supported bridges, and the failure of cables is usually caused by the degradation of mechanical properties of internal wires. Based on Faraday's law and the rates of microcrack initiation and propagation, a multi-scale corrosion fatigue damage model was developed to describe the damage evolution in the stages of pit growth and microcrack propagation. The accuracy and effectiveness of this damage model were also verified through the experimental data of corrosive fatigue life of high-strength bridge wires. The result shows that this damage model can describe the multi-scale corrosion fatigue damage evolution process of high-strength bridge wires reasonably and effectively, which provides a new way to better understand the trans-scale damage evolution mechanism during the corrosion fatigue process of high-strength bridge wires.

A chemo-micromechanical damage model of concrete under sulfate attack

“…Liao et al (2020) recorded the constitutive relationship of sulfateattacked concrete. The stress-induced microcracks were interpreted by damage variables based on the continuum damage mechanics (Bru¨nig and Michalski, 2020;Chen et al, 2020aChen et al, , 2020bJu, 1989Ju, , 1990Liu et al, 2020;Oucif et al, 2019;Ju, 1987a, 1987b;Tixier and Mobasher, 2003;Zhou and Ju, 2019;Zhou et al, 2016Zhou et al, , 2017Zhu et al, 2016), which has been widely adopted as the basis of other damage models (Chen et al, 2021;Fan et al, 2020;Liu et al, 2019;Sochu et al, 2018;Yan et al, 2019;Zhang et al, 2019Zhang et al, , 2020. In this context, the constitutive response of the progressively damaged material is simulated by a constitutive law of uniaxial stress-strain, which links the local strain with the damage.…”

Analysis of thermo-mechanical coupling damage behavior in long-term performance of microelectromechanical systems actuators

“…Although most of MEMS material is fabricated by polysilicon (Dellaert and Doutreloigne, 2014; Hussein et al., 2015; Kumar and Sharma, 2014), CDM can still be reasonably used into MEMS material. According to the applications of CDM, almost all materials can be applied to damage mechanics, such as metals (Cheng and Li,2020;Fan et al.,2020), polymers (Din et al., 2018), elastomers (Andriyana et al., 2015), composites (Fang et al., 2017), and concrete (Wu et al., 2020). Even if the failure mechanisms vary on the micro scale, they have more or less the same qualitative behaviors on meso- or macroscales (Lemaitre and Desmorat, 2005).…”

“…The long-term reliability curves (such as “S-N” curve) and the evolution process of microstructurally small cracks of silicon films and metal films are experimentally demonstrated to have remarkable similarities (Muhlstein et al., 2001, 2004). Therefore, it is reasonable to apply the methodology of CDM modeling of metal materials (Cheng and Li, 2020; Fan et al., 2020; Guo et al., 2020; Sun et al., 2019) to silicon materials.…”

“…Therefore, the modeling method of RVEs which has been successfully used to simulate the microstructure of metal films containing microcracks is applied to polysilicon. In other words, cracks occur in each element is used to simulate the cracking in each grain, and the grain boundary is the barrier to the propagation of microstructurally small cracks (Cheng and Li, 2020; Fan et al., 2020; Guo et al., 2020; Sun et al., 2019).…”

A continuum damage model for prediction of crack initiation life of pitting corrosion and fatigue

“…The damage variable is assumed as a scalar for isotropic damage models, and is typically defined as where A is the total cross-sectional area of the mesoscale representative volume element (RVE), trueA˜ is the effective cross-sectional area. The development of CDM provides a new approach to study the damage process and failure for different structures with different materials (Fan et al., 2020; Park et al., 2021; Sun, 2018; Sun and Xu, 2021; Sun et al., 2019). Based on CDM, Chaboche and Lesne (1988), Lemaitre (1987), Lemaitre and Desmorat (2005) successively proposed several models for fatigue damage, which were frequently introduced into studies for finite element simulation of CFCI (Cui et al., 2020; Hu et al., 2016; Jie et al., 2018; Sun, 2018; Zheng and Wang, 2020).…”