Auto‐adaptive multiblock cycle jump algorithm for fatigue damage simulation of long‐span steel bridges

Abstract

An algorithm is developed for fatigue damage evolution simulation of long‐span steel bridges based on continuum damage mechanics (CDM) in this study. The progressive fatigue damage from local component damage evolution to entire structural failure is simulated with nonstandard varying block cycle length, which is automatically obtained during computation to speed up fatigue evolution simulation without user intervention. In this paper, progressive fatigue damage evolution of the Stonecutters cable‐stayed bridge due to vehicle loading is simulated by using the proposed algorithm and the bridge model. It shows that the algorithm is effective, and it can improve the computational efficiency of fatigue damage simulation of a large‐scale steel bridge.

Review of annual progress of bridge engineering in 2019

“…The dominant fatigue cracking mode and fatigue performance of welded joints under the condition of multi-crack mode of rib-to-deck welded joint in orthotropic steel deck were studied using equivalent structural stress method (Li et al 2019d). Sun et al (2019a, b) proposed an adaptive crossscale fatigue damage assessment method for long-span steel bridge based on the theory of microstructure damage mechanics of steel bridge. The assessment method and theory of fatigue damage and life should be further proposed considering multiple loading, micromechanics of welded joints, etc.…”

“…In informatization for bridge design, BIM technology provides a platform of threedimensional digital design, which can be directly used for creative expression and structural optimization of complex shapes. Sun et al (2019c) and Zhang and Liu (2019) et al studied the 3D parameterized standard modeling method based on BIM, so as to avoid the construction rework caused by design errors.…”

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

“…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 unified approach based on temporal homogenisation and cycle jump for thermo-mechanical combined cycle fatigue

“…Another classical technique to avoid cycle by cycle simulation is the cycle jump method, where large number of cycles can be skipped based on the information of the last computed cycle, with the damage variable being linearly extrapolated. This technique was first introduced in [8,27,26] and different variants of it has been used in [25,9,12,34]. Similar technique has also been used for non-incremental iterative solvers like the LATIN method, for viscoplasticity (see [11]) for viscoplasticity coupled with damage (see [7]), and for two-scale damage models (see [6]).…”