期刊
COMPOSITE STRUCTURES
卷 262, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2021.113634
关键词
Short carbon fiber-reinforced polymer; composites; Micro compute tomography; Digital volume correlation; In-situ tensile characterization
资金
- National Key Research and Development of China [2018YFA0702804, 2017YFB0103801]
- National Natural Science Foundation of China [11872012, 11872025]
- China Postdoctoral Science Foundation [2019M660023]
- National Postdoctoral Program for Innovative Talent [BX20190040]
- State Key Laboratory of Explosion Science and Technology
- Young Elite Scientists Sponsorship Program
By combining high and low resolution ?CT scans, this study successfully monitored the 3D geometric morphology and deformation fields of SCFRP composites under different tension states, and determined the influence of micro geometric morphology on material fracture behavior.
In-situ Micro X-ray computed tomography (?CT) offers a new opportunity to monitor the 3D morphology and damage evolution of short carbon fiber-reinforced polymer (SCFRP) composite. However, the sample size of in -situ ?CT is generally limited to achieve high revolution, which resulted in different mechanical behavior compared with that obtained from standard samples. In this study, ?CT scans with two resolutions were combined to character the 3D geometrical morphology and monitor the 3D deformation fields of SCFRP composites under tension. High resolution ?CT scans with voxel size of 0.68 ?m were used to quantify the geometric characteristics of fibers and void defects inside small samples. Low resolution in-situ ?CT scans with voxel size of 4 ?m and digital volume correlation method were utilized to monitor the 3D deformation fields of standard specimens under tension. The failure behavior of SCFRP was determined by the micro geometric morphology. The fracture surface under tension is oriented along 120? and 240? in the XY plane, which is consistent with the fiber and debonding distribution.
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