| Author | Kam-Lun Shek, Mark W. Beall, George J. Dvorak and Mark S. Shephard |
|---|---|
| Title | Bimodal Plasticity Evaluation Tool |
| Year | 1993 |
| Pages | - - |
| Editor | - - |
| Abstract | A visualization tool for the evaluation of yield surfaces of fibrous composite laminates is developed by using IBM Visualization Data Explorer. It is based on bimodal plasticity theory in which two distinct deformation modes have been proposed by Dvorak and Bahei-El-Din. The overall yield surface is the inner envelope of the two yield surfaces corresponding to two deformation modes among all laminae. By this evaluation tool, the two yield surfaces for two modes and their combined surface for each ply as well as the overall yield surface among all layers can be visualized freely in any 2D or 3D subspace of the 6-dimensional overall stress space, for individual layer or all layers. Also, different branches come from different layers in the overall yield surface are represented by different colors. Furthermore, the capability of inspection for the motion of yield surfaces due to a uniform temperature change is built up by making use of Dvorak's decomposition procedure. In this document, the theories behind the visualization tool are reviewed, all the technical aspects of developing this tool are discussed and one chapter is the user's manual. |