Date of Award

Spring 1995

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Mechanical & Aerospace Engineering

Program/Concentration

Engineering Mechanics

Committee Director

R. Prabhakaran

Committee Member

S. G. Cupschalk

Committee Member

Y. Mikata

Call Number for Print

Special Collections; LD4331.E57 M667

Abstract

An experimental investigation was conducted to evaluate the hole size effects, i.e., the reduction in strength with an increase in hole size at a constant stress concentration factor, for a glass fiber reinforced epoxy crossply laminate during tensile fracture. The characteristic dimension according to the point-stress and average-stress criteria of the two-parameter models proposed by Whitney and Nuismer were determined and compared for a circular hole, optimized circular hole, square hole with radiused corners and square hole with sharp corners. Modified versions of the two-parameter models proposed by Karlak and Pipes, Wetherhold, and Gillespie were also compared. On the basis of the results from this investigation, it is suggested that the characteristic dimension depends on the hole size and shape of cutout. Also, a similarity between the Neuber constant for metals and the average stress characteristic dimension from the two-parameter models was noted and investigated further.

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DOI

10.25777/z3yb-5s95

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