Accession Number : ADA310352

Title :   Comparative Evaluation of Failure Analysis Methods for Composite Laminates.

Descriptive Note : Final rept.,

Corporate Author : PURDUE UNIV LAFAYETTE IN SCHOOL OF AERONAUTICS AND ASTRONAUTICS

PDF Url : ADA310352

Report Date : MAY 1996

Pagination or Media Count : 134

Abstract : Over the last three decades, there have been continuous efforts in developing failure criteria for unidirectional fiber composites and their laminates. Currently, there exist a large number of lamina failure criteria and laminate failure analysis methods. In this project, a comprehensive and objective study of lamina and laminate failure criteria was performed. Comparisons among the commonly used failure criteria were made for failure in unidirectional composites under various loading cases. From these comparisons, the characteristics of these criteria were identified and discussed. Further, with the aid of some limited experimental lamina and laminate strength data available in the literature and new data generated by the authors, an attempt was made to select the failure criteria and laminate analysis methods that are mechanistically sound and are capable of accurately predicting lamina and laminate strengths for states of combined stresses. It was found that those lamina failure criteria which separate fiber and matrix failure modes most accurately predict lamina and laminate strength.

Descriptors :   *COMPOSITE MATERIALS, *LAMINATES, STRESSES, STRESS STRAIN RELATIONS, FIBER REINFORCED COMPOSITES, FAILURE, STRENGTH(MECHANICS), UNIDIRECTIONAL.

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE