Fracture toughness and AE Characteristics of Engineering plastic according to thickness

J. Ocean Eng. Technol. 1996;10(4):51-57.

두께변화에 따른 엔지니어링 플라스틱의 파괴인성과 AE특성

남기우,김선진,안병현

부경대학교 재료공학과,부경대학교 기계공학과,부경대학교 재료공학과

Keywords: Engineering Plastic, Polymer, Fracture Toughness, Stress Intensity Factor, Acoustic Emission, Specimen Thinkness, Weibull Distribution

핵심용어: 공업용플라스틱, 고분자재료, 파괴인성, 응력확대계수, 음향방출, 시험편 두께, 바이블 분포

Abstract

A standard method for the evalution of the fracture toughness of the high polymer materials has not been fully developed in comparison with that for metallic materials, and has not yet established. In this paper, fracture toughness tests using polycarbonate specimens were carried out. The fracture thughness tests using polycabonate specimens were carried out. The fracture toughness of commercial polycarbonate were dependent on the specimen thickness. The specimen thickness is necessary above 8mm to obtain the valid $K_{IC}$. A cumulative counts were slightly dependent on specimen thickness.