The novel detection equipment of residual stress of PMMA

Abstract

PMMA is widely used in aquariums, windows of planes and submarines, and even scientific experiments like the Jiangmen Underground Neutrino Observatory (JUNO). Residual stress in PMMA has an important influence on its craze, creep and lifetime. The novel detection equipment of residual stress of PMMA was developed using spectral measurement and analysis technology based on the principle of stress birefringence and Wertheim's stress-optical law. There are two advantages of the novel detection equipment -the optical path difference is obtained through multi-wavelength spectral analysis instead of single-wavelength analysis, and the measurement accuracy of residual stress is better; the detection equipment can not only analyze PMMA samples in laboratory, but in actual engineering.