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Model of fatigue damage in strain-rate-sensitive composite materials

Published online by Cambridge University Press:  31 January 2011

Sanboh Lee*
Affiliation:
Department of Materials Science and Engineering, National Tsing Hua University, Hsin-Chu, Taiwan, Republic of China
Tinh Nguyen
Affiliation:
Materials and Construction Research Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
Tze-jer Chuang
Affiliation:
Ceramics Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
*
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Abstract

A fatigue damage accumulation model based on the Paris law is proposed for strain-rate-sensitive polymer composite materials. A pre-exponent factor c2/f and strain-rate-sensitive exponent n are introduced. Numerical analysis of the model was performed using experimental data obtained in the literature. Both factors were found to enhance fatigue damage accumulation. The analysis also revealed that the extent of damage increases with decreasing frequency and that the damage rate is more sensitive to the applied maximum stress than to the stiffness of the material.

Type
Articles
Copyright
Copyright © Materials Research Society 2003

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References

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