EVALUATION OF HOMOGENIZATION FOR GLOBAL-LOCAL STRESS-ANALYSIS OF TEXTILE COMPOSITES

Global/local analysis is essential for textile composites because of t heir unusually large microstructure. Homogenized engineering propertie s were used in this study to obtain global solutions. The response of a local region was approximated by several fundamental strain or stres s modes. The magnitudes of these modes, which were determined from the global solutions,:were used to scale and superpose solutions from ref ined analyses of the fundamental modes, thus obtaining a refined local solution. Results from numerical experiments showed that the use of h omogenized engineering properties often results in significant errors in prediction of global response, especially at boundaries. Also, the local predictions were very sensitive to the choice of fundamental mod es.