Investigations about notch length in pure-shear test specimen for exact analysis of crack propagation in elastomers
The objective of the research presented in this paper is to investigate and to define the minimal length of notch for the initiation of crack propagation in the pure-shear test specimen for the analysis of dynamic crack propagation in elastomers. Test specimens with different geometry factors L<sub>0</sub> / W (length to width of test piece) in the range from 1/12 to 1/4 and with or without initial crack have been investigated. The new developed experimental method has been supplemented by an appropriate FE–analysis. A minimal allowed notch length in the test piece, independent from its geometry, could be defined. This definition forms the theoretical basis for the improvement of efficiency for the analysis of dynamic crack propagation in rubbers.
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