Mode-I fracture toughness measurement of PMMA with the Brazilian disk test
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PMMA (Polymethyl methacrylate) is employed as an industrial material due to its excellent properties. Therefore, investigating the fracture behavior for this material is of importance in its structural applications. It is well known that fracture toughness is an important material parameter in characterizing mechanical properties of materials. So far, a number of experimental techniques have been developed for determining the fracture toughness of materials under different conditions [ 1]. Particularly, Brazilian disk (central cracked circular disk) test technique is widely used to measure the fracture toughness of brittle materials under mixed-mode loading conditions [ 2, 3, 4]. The schematic diagram of Brazilian disk and loading configuration is shown in Fig. 1. The diameter of the disk is 2R and the crack length is 2a. A pair of compressive load, P, is applied at the boundary and across the diameter of the disk. The angle of inclination of the crack plane relative to the line of...
KeywordsFracture Toughness PMMA Stress Intensity Factor Critical Stress Intensity Factor Brazilian Disk
This work was supported by National Natural Science Foundation of China (Project No. 10202021).
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