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Mechanical Properties of a Centrally Notched APC-2 Composite Laminate Due to Fatigue Loading at Elevated Temperature (II)

Published online by Cambridge University Press:  05 May 2011

M.-H. R. Jen  and
Y.-C. Tseng
M.-H. R. Jen*
Affiliation:
Department of Mech. and Electro-Mech. Engr., National Sun Yat-Sen Universality, Kaohsiung, Taiwan 80424, R. O. C.
Y.-C. Tseng*
Affiliation:
Department of Aviation Mech. Engr., China Institute of Technology, Hsinchu, Taiwan 31241, R.O.C.
*
* Professor
** Assistant Professor
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Abstract

The temperature versus life (T-N) curves of both centrally notched and unnotched AS-4/PEEK (APC-2) composite laminates due to constant stress amplitude tension-tension (T-T) fatigue loading were investigated systematically. The cross-ply laminate possesses the higher mechanical properties than those of the quasi-isotropic laminate at elevated temperature, and also the mechanical properties of both lay-ups are degraded significantly as the temperature increasing. Combining both effects of notch and temperature at various normalized stresses it is found the cross-ply laminate possesses more resistance to cyclic loading than that of the quasi-isotropic laminate. Additionally, the predictive strain model is in a practical and simple form. Alternatively, the T-N curves, instead of conventionally S-N curves, at variously applied stresses are accomplished for preliminary designs and applications.

Keywords

LaminateNotchTemperatureFatigue
Type
Articles
Information
Journal of Mechanics , Volume 25 , Issue 3 , September 2009 , pp. 251 - 259
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2009

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References

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