Method for testing fracture toughness of soft material based on trouser leg tearing experiment

• Main Authors: ZHOU ZIDI, JIA YETONG, LIU ZISHUN
• Format: Patent
• Language: Chinese; English
• Published: 01.11.2022
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a method for testing fracture toughness of a soft material based on a trouser leg tearing experiment, and belongs to the technical field of material performance testing. Aiming at the problem that the fracture toughness of the soft material is difficult to comprehensively characterize at the present stage, the test method introduces a concept of free size on the basis of a traditional trouser leg tearing experiment, and the characteristic size of a crack tip field damage area is controlled by adjusting the free size of a test piece, so that the contribution degree of extrinsic dissipation of the soft material to the fracture toughness is controlled; finally, the change relation of the apparent fracture toughness of the soft material along with the free size of the test piece is obtained, and the method has definite physical significance. The method is simple in principle and easy to operate, the fracture performance of the soft material can be comprehensively represented at multiple an