Micromechanical Models for Textile Structural Composites

By National Aeronautics and Space Administration

The objective is to develop micromechanical models for predicting the stiffness and strength properties of textile composite materials. Two models are presented to predict the homogeneous elastic constants and coefficients of thermal expansion of a textile composite. The first model is based on rigorous finite element analysis of the textile composite unit-cell. Periodic boundary conditions are enforced between opposite faces of the unit-cell to simulate deformations accurately. The second model implements the selective averaging method (SAM), which is based on a judicious combination of stiffness and compliance averaging. For thin textile composites, both models can predict the plate stiffness coefficients and plate thermal coefficients. The finite element procedure is extended to compute the thermal residual microstresses, and to estimate the initial failure envelope for textile composites. Marrey, Ramesh V. and Sankar, Bhavani V. Unspecified Center BRAIDED COMPOSITES; FINITE ELEMENT METHOD; STRESS ANALYSIS; THERMOELASTICITY; WOVEN COMPOSITES; MATHEMATICAL MODELS; MICROMECHANICS; RESIDUAL STRESS; STIFFNESS; STRUCTURAL FAILURE; THERMAL EXPANSION; THERMAL STRESSES...

• Format: Paperback
• Language: English
• ISBN: 1731272588
• ISBN13: 9781731272584
• Release Date: January 1
• Publisher: Independently Published
• Length: 142 Pages
• Weight: 0.76 lbs.
• Dimensions: 0.3" x 8.5" x 11.0"