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A multiscale computational method with inheriting simulation of moving trans-scale boundary for damage-induced structural deterioration

Zheyuan Zheng (Jiangsu Key Laboratory of Engineering Mechanics, Southeast University, Nanjing, China)
Zhaoxia Li (Jiangsu Key Laboratory of Engineering Mechanics, Southeast University, Nanjing, China)

Engineering Computations

ISSN: 0264-4401

Article publication date: 3 July 2017

Abstract

Purpose

This paper aims to introduce a multiscale computational method for structural failure analysis with inheriting simulation of moving trans-scale boundary (MTB). This method is motivated from the error in domain bridging caused by cross-scale damage evolution, which is common in structural failure induced by damage accumulation.

Design/methodology/approach

Within the method, vulnerable regions with high stress level are described by continuum damage mechanics, while elastic structural theory is sufficient for the rest, dividing the structural model into two scale domains. The two domains are bridged to generate mixed dimensional finite element equation of the whole system. Inheriting simulation is developed to make the computation of MTB sustainable.

Findings

Numerical tests of a notched three-point bending beam and a steel frame show that this MTB method can improve efficiency and ensure accuracy while capturing the effect of material damage on deterioration of components and structure.

Originality/value

The proposed MTB method with inheriting simulation is an extension of multiscale simulation to structural failure analysis. Most importantly, it can deal with cross-scale damage evolution and improve computation efficiency significantly.

Keywords

Acknowledgements

The work described in this paper was substantially supported by the grant from Major State Research Development Program of China (2016YFC0701301-02), Graduate Innovation Project of Jiangsu Province (No. KYLX_0094) and Jiangsu Higher Education Institutions for the Priority Academic Development Program (CE02-1-26), which are gratefully acknowledged.

Citation

Zheng, Z. and Li, Z. (2017), "A multiscale computational method with inheriting simulation of moving trans-scale boundary for damage-induced structural deterioration", Engineering Computations, Vol. 34 No. 5, pp. 1677-1699. https://doi.org/10.1108/EC-06-2016-0219

Publisher

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Emerald Publishing Limited

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