Residual stresses in thermoplastic composites—A study of the literature—Part II: Experimental techniques

TLDR: In this article, a survey of the literature on residual stresses in continuous fiber reinforced thermoplastic composites is presented, and experimental techniques to determine the magnitude and distribution of these stresses on various mechanical levels are outlined.

Abstract: This study forms part of a literature survey on residual stresses in continuous fibre reinforced thermoplastic composites. After identification of the factors responsible for the thermal residual stress build-up in Part I [Parlevliet PP, Bersee HEN, Beukers A. Residual stresses in thermoplastic composites – A study of the literature – Part I: Formation of residual stresses. Composites Part A – Appl Sci Manuf, in press, doi:10.1016/j.compositesa.2005.12.025 ], experimental techniques to determine the magnitude and distribution of these stresses on various mechanical levels are outlined. The techniques are placed in the following categories: techniques utilising the intrinsic composite constituents’ material properties; techniques employing embedded “foreign” stress sensors; techniques based on in-plane and out-of-plane deformations, and destructive techniques.