期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 39, 期 8, 页码 1253-1265出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2007.11.011
关键词
digital image correlation; foam; impact behavior; mechanical testing
资金
- Agence Nationale de la Recherche
- European Synchrotron Radiation Facility
A new methodology is proposed to estimate 3D displacement fields from pairs of images obtained froth X-ray computed microtomography (XCMT). Contrary to local approaches, a global approach is followed herein that evaluates continuous displacement fields. Although any displacement basis may be considered, the procedure is specialized to finite element shape functions. The method is illustrated with the analysis of a compression test on a polypropylene solid foam (independently studied in a companion paper). A good stability of the measured displacement field is obtained for cubic element sizes ranging from 16 to 6 voxels. (C) 2007 Elsevier Ltd. All rights reserved.
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