ESTIMATION OF ELASTIC MODULUS AND ANALYSIS OF STRESS OF UNIDIRECTIONAL FIBER COMPOSITES BASED ON IMPERFECT INTERFACE

Abstract

Abstract: The interface defects have a significant effect on the properties of the materials performance. In this paper, the spring model without thickness has been considered to investigate the composite properties with imperfect interface in the elastic theory and energy principle. The relationships between the imperfect parameter, the volume fraction of fiber, and the effective properties, including the effective longitudinal and transverse elastic modulus and Poisson′s ratio were studied. Meanwhile, the results for the imperfect interface were compared by the classical results of perfect interface and a hole at two limit cases, and the test data. The result for finite positive values of interface parameter shows that the interface parameter can be used to estimate the material properties with the interface defects.

Key words: defects, elasticity, imperfect interface, Young′s modulus, Poisson′s ratio, energy method, numerical analysis

CLC Number:

TB332

DENG Zhi-kang, DENG Jing-lan, WANG Ji-hui, HUANG Zhi-qiang. ESTIMATION OF ELASTIC MODULUS AND ANALYSIS OF STRESS OF UNIDIRECTIONAL FIBER COMPOSITES BASED ON IMPERFECT INTERFACE[J]. Fiber Reinforced Plastics/Composites, 2016, 0(9): 33-38.

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