Generalized elastic damage theory and its application to composite plate

✍ Scribed by Shen Wei; Peng Lihua; Yang Fan; Shen Zhen

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 608 KB
• Volume: 28
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(87)90185-8

✦ Synopsis

Based on continuum

mechanics, a generalized damage theory for elastic material which can be used for anisotropic composite is presented in this paper. This theory for anisotropic elastic material has been proposed here from the stress-strain relation of the actual damaged material. Introducing a fourth order damage operator that may be formed by a symmetrical second order damage factor tensor, the constitutive equation of the damaged material has been set up. The expressions of components of both the stress tensor and the strain tensor of the damaged material and their first order invariants have been also derived. The application of this theory to the 2-dimensional composite laminate, including the technique estimating the components of the damage factor tensor and the damage variabktensor and also the practical measure technique of the damage in the whole process, have been explained in detail. Finally. the changes of the anisotropic elastic properties and the actual stress state of damaged material have been discussed and some interesting results have been obtained in this paper.