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Finite Element Based Point Stress Criterion for Predicting the Notched Strengths of Composite Plates

Published online by Cambridge University Press:  09 August 2012

K.-H. Tsai ,
C.-L. Hwan ,
M.-J. Lin  and
Y. S. Huang
K.-H. Tsai
Affiliation:
Graduate School of Textile Engineering, Feng Chia University Taichung, Taiwan 40724, R.O.C.
C.-L. Hwan*
Affiliation:
Department of Mechanical and Computer Aided Engineering, Feng Chia University Taichung, Taiwan 40724, R.O.C.
M.-J. Lin
Affiliation:
Department of Mechanical and Computer Aided Engineering, Feng Chia University Taichung, Taiwan 40724, R.O.C.
Y. S. Huang
Affiliation:
Graduate School of Textile Engineering, Feng-Chia University Taichung, Taiwan 40724, R.O.C.
*
*Corresponding author ([email protected])
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Abstract

In this study, a novel procedure has been developed for predicting the notched strengths of composite plates each with a center hole. In this approach, the stress distribution of a composite plate with a center hole is first obtained by a finite element analysis, in which the experimental notched strength is applied at the boundary of the finite element model. Secondly, the point stress criterion (PSC) is used to find the characteristic length for each plate with different size of hole by an interpolation of the finite element analysis results. The characteristic length is then expressed as an empirical function of the hole size as well as the width of the plate. Finally, the notched strengths of composite plates are predicted based on the empirical function and the finite element analysis results incorporated with the principle of superposition in elasticity. For validation, three different cases from the literatures are adopted for comparison. It is shown that the predicted notched strengths by this new methodology agree well with both the experimental results and the results from analytical solutions based PSC.

Keywords

Composite platePoint stress criterionCharacteristic lengthFinite element
Type
Articles
Information
Journal of Mechanics , Volume 28 , Issue 3 , September 2012 , pp. 401 - 406
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2012

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References

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