Extension of the hole‐drilling method to birefringent composites
作者:
R. Prabhakaran,
期刊:
Polymer Composites
(WILEY Available online 1982)
卷期:
Volume 3,
issue 1
页码: 40-43
ISSN:0272-8397
年代: 1982
DOI:10.1002/pc.750030108
出版商: Society of Plastics Engineers, Inc.
数据来源: WILEY
摘要:
AbstractA complete stress analysis and reliable failure criteria are essential for important structural applications of composites in order to fully utilize their unique properties. The inhomogeneity, anisotropy and inelasticity of many composites make the use of experimental methods indispensable. Among the experimental techniques, transmission photoelasticity has been extended to birefringent composites in recent years. The extension is not straight‐forward, in view of the complex nature of the photoelastic response of such model materials. This paper very briefly reviews the important developments in the subject and then describes the theoretical basis for a new method of determining the individual values of principal stresses in composite models. The mehod consists in drilling very small holes at points where the state of stress has to be determined. Experiments are then described which verify the theoretical predictions. The limitations of the method are pointed out and it is concluded that valuable information concerning the state of stress in a composite model can be obtained through the suggested metho
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