An application of the single specimen technique to a double cantilever beam specimen to determine GIC from a single test record |
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Authors: | K.Y. Rhee |
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Affiliation: | Department of Mechanical and Aerospace Engineering, Rutgers University, Piscataway, New Jersey 08855-0909, USA |
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Abstract: | The single specimen technique is effectively used in classical fracture mechanics for evaluating the J-integral from a single test record. It was previously shown using a cracked lap shear specimen that the technique can be applied to composite structures and the energy release rate of composite laminates can be determined from a single test specimen. The objective of this investigation is to determine the ηel form of a double cantilever beam (DCB) specimen, and to compare it with that of a compact tension (CT) specimen. The result showed that while ηel is linearly related to crack length for the CT specimen, it is proportional to the reciprocal of the crack length for the DCB composite specimen. Also, GIc determined from the compliance method was compared with that determined from the ηel approach. The result showed that the ηel form determined from a single beam analysis can be used to determine GIc from a single test record. |
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