Experimental investigation on surface deformation of soft half plane indented by rigid wedge  

作　　者：Xiaohua TAN Yilan KANG E.A.PATTERSON 

机构地区：[1]Tianjin Key Laboratory of High Speed Cutting and Precision Machining, Tianjin University of Technology and Education [2]School of Engineering, University of Liverpool [3]Tianjin Key Laboratory of Modern Engineering Mechanics, School of Mechanical Engineering, Tianjin University

出　　处：《Applied Mathematics and Mechanics(English Edition)》2016年第10期1349-1360,共12页应用数学和力学（英文版）

基　　金：Project supported by the National Basic Research Program of China(No.2012CB937500);the National Natural Science Foundation of China(No.11127292)

摘　　要：In this work, the mechanical behavior of a block of soft material subject to large deformation from a series of wedge-shaped indenters is evaluated. Data fields acquired from digital image correlation （DIC） are compared with the existing theoretical models. The slope angles of the wedges vary from 5° to 73.5°, and the minimum measure- ment uncertainties of the DIC system are established in advance to define the accuracy. It is concluded that the assumptions underpinning the analytical theory make it difficult to characterize large deformation of soft materials during contact. The strain fields are also obtained from the measured displacement field and verify the previously postulated existence of two deformation sectors, namely, a so-called shrinkage sector symmetric to the loading axis and an expansion sector, which become smaller with the increasing load and decreasing wedge angle.In this work, the mechanical behavior of a block of soft material subject to large deformation from a series of wedge-shaped indenters is evaluated. Data fields acquired from digital image correlation （DIC） are compared with the existing theoretical models. The slope angles of the wedges vary from 5° to 73.5°, and the minimum measure- ment uncertainties of the DIC system are established in advance to define the accuracy. It is concluded that the assumptions underpinning the analytical theory make it difficult to characterize large deformation of soft materials during contact. The strain fields are also obtained from the measured displacement field and verify the previously postulated existence of two deformation sectors, namely, a so-called shrinkage sector symmetric to the loading axis and an expansion sector, which become smaller with the increasing load and decreasing wedge angle.

关 键 词：contact mechanics wedge indentation large deformation sector division digital image correlation （DIC） 

分 类 号：O347[理学—固体力学]