Experimental Analysis of Mechanics Problem within Soft Material Contact Field in Large Deformation
软材料接触力学问题的实验研究

An experimental measurement technique was developed and presented in this paper for solving the mechanics problem emerged in the contact field formed by a rigid indenter and rubber-like soft material with large deformation. The soft material being studied is a kind of vulcanized silicone rubber, and the in-plane deformation of a large deformation field is measured by digital moiré method. As the specimen is in large deformation and the contact with wedge-shape indenter occurs in the specimen, an inner-grating technology is presented, and its principle and implementation method is introduced in the paper. The vertical and horizontal displacement field was obtained by digital image processing method. Then, deformation characteristics and experimental sector division properties in the vicinity of contact edge were analyzed according to the results of in-plane deformation. Further, the strain distribution near the contact area can be provided by a grid deformation method, based on large deformation theory. The data were directly obtained from experimental results, so it's intuitive and reliable.