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Structural Engineering and Mechanics Volume 10, Number 2, August 2000, pages 139-156 DOI: http://dx.doi.org/10.12989/sem.2000.10.2.139 |
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A study of dynamic responses of incorporating damaged materials and structures |
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Zhang WH, Chen YM, Jin Y
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| Abstract | ||
| This paper concerns the development of a computational model for the damage evolution of engineering materials under dynamic loading. Two models describing the anisotropic damage evolution of a material are presented; the first is based on a power function of the effective equivalent stress and the second on the damage strain energy release rate. The methods for computing the damage accumulated in structural components and their implementation in a finite element programme are presented together with some numerical results. The dynamic response of a damaged structural component and the dynamic behaviour of a damaged material have been studied numerically. This study shows that the frequency spectrum of a damaged structure is down-shifted, while the damping ratio of damaged materials becomes higher, the amplitude of the response significantly increases and the resonance ensuing from the damage growth still occurs in a damaged structure. | ||
| Key Words | ||
| dynamic response, damage evolution law, damage-based FEM analysis | ||
| Address | ||
| Zhang WH, Zhejiang Univ, Inst Geotech Engn, Hangzhou 310027, Peoples R China Zhejiang Univ, Inst Geotech Engn, Hangzhou 310027, Peoples R China | ||