Optimization of structural designs for a safe failure pattern: layered material systems

✍ Scribed by V.M. Harik

• Publisher: Elsevier Science
• Year: 2001
• Weight: 202 KB
• Volume: 22
• Category: Article
• ISSN: 0261-3069
• DOI: 10.1016/s0261-3069(00)00085-6

✦ Synopsis

The optimization of structural designs for a safe failure of laminated material systems was analyzed along with built-in damage Ž . indicators. This design methodology is based on the concept of a characteristic failure signature CFS and three-dimensional laminate analysis of layered composite materials. The analytical model used is able to predict the CFS of a non-linear stressrstrain response, accumulation of damage and failure behavior. The analysis of CFSs was based on an incremental formulation of a three-dimensional laminated media analysis coupled with a progressive ply failure methodology. CFSs are shown to have unique safety features which depend on the ply stacking sequence and predominant loading conditions for a particular industrial application. Various examples of tailoring a safe CFS for anisotropic laminated structures are discussed.