Local acoustoelasticity in poly(methyl methacrylate) by Brillouin scattering

The Brillouin scattering technique was used to study the local mechanical deformation of poly(methyl methacrylate) (PMMA). The extent of local stress concentration could be determined by measuring longitudinal hypersonic velocities in the close vicinity of a circular hole and a sharp single-edge-not...

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Bibliographic Details
Published in:Journal of applied physics 1983-09, Vol.54 (9), p.5456-5458
Main Authors: YAP, B. C, SHICHIJYO, S, TAKEMURA, T, MATSUSHIGE, K
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Mechanical properties
Organic polymers
Physicochemistry of polymers
Properties and characterization
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Summary:The Brillouin scattering technique was used to study the local mechanical deformation of poly(methyl methacrylate) (PMMA). The extent of local stress concentration could be determined by measuring longitudinal hypersonic velocities in the close vicinity of a circular hole and a sharp single-edge-notch (SEN) in panel PMMA specimens under uniaxial tensile stress. Craze formation in PMMA is also briefly discussed in association with such a local deformation. Present studies demonstrate that the Brillouin scattering technique is a new and effective probe for such an investigation in transparent materials.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.332729