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- W2022609272 abstract "Describes the results of experiments on notched and cracked polymethyl methacrylate (PMMA) beams which have been subjected to tensile and impact loading. The dynamic load was applied to the edge of the beam by a projectile (steel sphere) fired from an air gun. The amplitude of the stress pulse has been carefully chosen so as to create a crack propagation that could be recorded step by step. Special attention has been paid to measuring the fracture surface energy by the method of caustics using the second step of the propagating crack. A marked difference has been found in the fracture surface energy calculated by the method of caustics using the first or the second step of propagation. The influence of the notch width on the fracture surface energy has also been studied in connection with cracked specimens, where the cracks have been induced by fatigue. Finally, a comparison of the results of the present work with the corresponding experimental data or previous investigations has been made." @default.
- W2022609272 created "2016-06-24" @default.
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- W2022609272 date "1988-01-14" @default.
- W2022609272 modified "2023-10-10" @default.
- W2022609272 title "Fracture surface energy measurements of PMMA: a new experimental approach" @default.
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- W2022609272 doi "https://doi.org/10.1088/0022-3727/21/1/012" @default.
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