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Journal of Reinforced Plastics and Composites
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Effect of T-stress on Damage Zone Size Predictions of Notched Laminated Composites

Hsien-Yang Yeh

Department of Mechanical and Aerospace Engineering California State University Long Beach, CA 90840, USA; hyyeh{at}csulb.edu

Hina Naz Rashid

Department of Mechanical and Aerospace Engineering California State University Long Beach, CA 90840, USA

Hsien-Liang Yeh

Department of Civil and Ecological Engineering I-Shou University Kaohsiung County, Taiwan, China

In this article, the influence of T-stress on the plastic/damage zone size of a precracked isotropic/composite plate is studied by using various failure criteria under tensile loading conditions. The results of this study indicate that the stress field with T-stress always yields a larger damage zone than the field without T-stress. Using experimental data for a symmetrical, generally orthotropic graphite–epoxy laminate, the damage zone sizes predicted by the average stress criterion and point stress criterion as well as the D-criterion are compared. Experimental measurements of crack-tip damage zone size are used to establish a physical reference point by which all the theories are compared.

Key Words: T-stress • damage zone size • notched laminated composites

Journal of Reinforced Plastics and Composites, Vol. 25, No. 1, 89-98 (2006)
DOI: 10.1177/0731684406055458
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