Precise evaluation of fast fracture velocities in acrylic polymers at the slow-to-fast transition

Transient fast fracture velocities at the onset of the slow-to-fast transition in polymethylmethacrylate (PMMA) have been measured precisely in single-edge-notched specimens of various geometries by using ultrasonic fractography. Little sign of the fracture velocity of the order of 10 degree m sec s...

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Bibliographic Details
Published in:Journal of materials science 1984-12, Vol.19 (12), p.4026-4034
Main Authors: TAKAHASHI, K, MATSUSHIGE, K, SAKURADA, Y
Format: Article
Language:English
Subjects:
Applied sciences
crack propagation
Exact sciences and technology
fracture
Mechanical properties
mechanical variables measurement
Physical properties
Polymer industry, paints, wood
polymers
Properties and testing
Technology of polymers
velocity measurement
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Summary:Transient fast fracture velocities at the onset of the slow-to-fast transition in polymethylmethacrylate (PMMA) have been measured precisely in single-edge-notched specimens of various geometries by using ultrasonic fractography. Little sign of the fracture velocity of the order of 10 degree m sec super(-1) have been detected on the instability onset. The fast fracture starts from a point source almost instantaneously. Crack propagation in low molecular weight PMMA has been shown to be more temperature, as well as loading rate, dependent than in higher molecular weight PMMA.
ISSN:0022-2461
1573-4803
DOI:10.1007/BF00980767