Computer-aided moire strain analysis on thermoplastic models at critical temperature

摘要

Abstract: Moire-holographic techniques are utilized to analyze the mechanical behavior of structural elements made of thermoplastic materials in the critical temperature domain. Several extensions of the basic set-up are described, which consist mainly in the computation of in- plane displacement components by a phase-shifting technique and in the computation of the derivatives of these components, either by pure numerical means or by a hybrid procedure involving an analog optical recording followed by an automatic phase calculation. The results of test carried out with ring shaped perspex specimens subjected to compression, various boundary conditions, and different temperature domains are also provided.!13