Multi-Level Technique for Stiffness and Strength Calculations of Woven Fabric Composite Plate and Shell Structures

摘要

The stiffness and strength behavior of the woven fabric composite materials mainly depend on the properties of the fiber and matrix materials. A technique was developed to design and analyze woven fabric composites based on the micro-level properties of the fiber and matrix materials. The technique is based on the bilateral relationships among the fiber/matrix materials, the unidirectional composite (strand), the woven fabric layer and the laminated composite structure as in the given order. Simplified and efficient analytical models were developed for the relationship between any subsequent levels of woven fabric composite materials. The technique is used to predict the structural level stiffness and strength in terms of material and the geometric configuration of the woven fabric and lamination. Progressive damage or failure can also be simulated at the fiber and matrix level by using this technique.