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Impact failure of poly(methyl methacrylate)

✍ Scribed by L. Bevan; P. E. Reed

Publisher: John Wiley and Sons
Year: 1992
Tongue: English
Weight: 986 KB
Volume: 46
Category: Article
ISSN: 0021-8995
DOI: 10.1002/app.1992.070461209

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✦ Synopsis

E l 4NS, United Kingdom SYNOPSIS Damage development during instrumented falling weight impact ( IFWIM) testing of poly (methyl methacrylate) (PMMA) is recorded using short pulse photography. The first visible damage is cracking on application of the peak force. Finite element analysis predicts the deformation and state of stress throughout the specimen until the first point of failure is reached. A variation in the specimen geometry produces a significant change in initial failure energy, while the maximum tensile stress is approximately constant. The proposed failure criterion is the attainment of a critical time-dependent value of tensile stress.

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