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- W2082983132 abstract "The dynamic stress-intensity factor about the tip of a rapidly moving crack (KD) in polymethylmethacrylate (PMMA) has been measured, using ultra-high speed photographic techniques to record the photoelastic patterns produced around the crack tip. From the same photographs, the velocity of the moving cracks was determined. A gross roughening of the fracture surface was found to appear at crack speeds of 1,300 ft sec−1 (396 m sec−1). From the geometry of the surface markings associated with the roughening, a dynamic value of Young's Modulus for PMMA was obtained over the velocity range 1,300–2,300 ft sec−1 (400–700 m sec−1). These dynamic values of Young's Modulus were used to interpret the variation of the stress intensity factor, KD, with crack velocity, and its relation to fracture morphology." @default.
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- W2082983132 date "1974-03-01" @default.
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- W2082983132 title "Measurement of the dynamic fracture toughness of polymethylmethacrylate by high-speed photography" @default.
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- W2082983132 doi "https://doi.org/10.1016/0013-7944(74)90047-2" @default.
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