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Stress and Failure Analysis of a Pin-Loaded Composite Plate: An Experimental Study

Engineering Science and Mechanics Department Virginia Polytechnic Institute and State University Blacksburg, Virginia 24061

J. Morton

Engineering Science and Mechanics Department Virginia Polytechnic Institute and State University Blacksburg, Virginia 24061

A graphite/epoxy quasi-isotropic composite plate was loaded through an aluminum pin. High-sensitivity moire interferometry was used to obtain fringe patterns of in-plane displacement components near the pin-plate contact surface. Stresses around and near the contact surface were determined from the experimentally obtained displacements using a localized hybrid approach which consisted of introducing the displacements around a local region of interest into a finite element analysis. X-ray radiography and optical microscopy were employed in a failure analysis of the plate.

Stress distributions on the near contact interface were obtained. Local damage was also documented successfully. A simple failure prediction based on classical laminate theory gave good agreement with the observed location of damage. Valuable local aspects fric tional phenomena were documented.

Journal of Composite Materials, Vol. 24, No. 10, 1101-1120 (1990)
DOI: 10.1177/002199839002401005


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