期刊
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
卷 44, 期 5, 页码 1643-1656出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijsolstr.2006.06.050
关键词
parameter identification; biaxial testing; digital image correlation
类别
This paper presents a mixed numerical-experimental method for the identification of the four in-plane orthotropic engineering constants of composite plate materials. A biaxial tensile test is performed on a cruciform test specimen. The heterogeneous displacement field is observed by a CCD camera and measured by a digital image correlation (DIC) technique. The measured displacement field and the subsequently computed strain field are compared with a finite element simulation of the same experiment. The four independent engineering constants are unknown parameters in the finite element model. Starting from an initial value, these parameters are updated till the computed strain field matches the experimental strain field. Two specimen geometries are used: one with a centered hole to increase the strain heterogeneity and one without a hole. It is found that the non-perforated specimen yields the most accurate results. (c) 2006 Elsevier Ltd. All rights reserved.
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