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Prediction of the Fiber-Matrix Interface Failure due to Longitudinal Tensile Loading Using Finite Element Methods

Published online by Cambridge University Press:  15 February 2011

Hassan Mahfuz,
A.K.M. Ahsan Mian,
Uday K. Vaidya,
Timothy Brown and
Shaik Jeelani
Hassan Mahfuz
Affiliation:
Materials Research Laboratory, Tuskegee University, Tuskegee, Alabama
A.K.M. Ahsan Mian
Affiliation:
Materials Research Laboratory, Tuskegee University, Tuskegee, Alabama
Uday K. Vaidya
Affiliation:
Materials Research Laboratory, Tuskegee University, Tuskegee, Alabama
Timothy Brown
Affiliation:
Materials Research Laboratory, Tuskegee University, Tuskegee, Alabama
Shaik Jeelani
Affiliation:
Materials Research Laboratory, Tuskegee University, Tuskegee, Alabama
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Abstract

A 3D-unit cell for 0/90 laminated composites has been developed to predict the composite behavior under longitudinal tensile loading condition. 3D contact element has been used to model the fiber matrix interface. Two interface conditions, namely, infinitely strong and weakly bonded, are considered in the analysis. Both large displacement and plastic strain behavior for the matrix are considered to account for the geometric and material non-linearities. Investigations were carried out at three temperatures to compare the composite response obtained from mechanical tests at those temperatures. Stress-strain behavior and the local stress distributions at the fiber as well as at the matrix are presented, and their effects on the failure of the interface are discussed in the paper. The material under investigation was SiCf/Si3N4.

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References

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