Compressive behavior of unidirectional fibrous compositesThe longitudinal compressive behavior of unidirectional fiber composites was investigated by using the Illinois Institute of Technology Research Institute (IITRI) test method with thick and thin test specimens. The test data obtained are interpreted by means of stress/strain curves from back-to-back strain gages, examination of fracture surfaces by scanning electron microscope, and predictive equations for distinct failure modes including fiber compression failure. Euler buckling, delamination, and flexure. The results show that longitudinal compressive fracture is induced by a combination of delamination, flexure, and fiber tier breaks. No distinct fracture surface characteristics can be associated with unique failure modes. An equation is described that can be used to extract the longitudinal compressive strength from the longitudinal tensile and flexural strengths of the same composite system.
Document ID
19840047107
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sinclair, J. H. (NASA Lewis Research Center Cleveland, OH, United States)
Chamis, C. C. (NASA Lewis Research Center Cleveland, OH, United States)