Effect of automated fiber placement (AFP) manufacturing signature on mechanical performance of composite structures

被引：71
|
作者：
Minh Hoang Nguyen [1 ]
Vijayachandran, Avinkrishnan A. [1 ]
Davidson, Paul [1 ]
Call, Damon [2 ]
Lee, Dongyeon [2 ]
Waas, Anthony M. [1 ]
机构：
[1] Univ Michigan, Aerosp Engn, Ann Arbor, MI 48109 USA
[2] Toray Composite Mat Amer Inc, Tacoma, WA 98446 USA
来源：
COMPOSITE STRUCTURES | 2019年 / 228卷
关键词：
Polymer matrix composites (PMCs); Automated fiber placement (AFP); Compaction; Manufacturing signature (MS); Imperfections; Effect of defects; Defects; Gaps; Overlaps; Mechanical properties; Toughened composites; Material testing; Failure; Microscopy inspection;
D O I：
10.1016/j.compstruct.2019.111335
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A comprehensive and detailed experimental study of the influence of imperfections caused during Automated Fiber Placement (AFP) manufacturing is reported. Specimens with controlled gap and overlap imperfections of varying sizes and distribution were manufactured and tested. Pre-test microscopy inspection has been conducted to quantify the change in geometry due to compaction. Test results show significant knockdown in stiffness and strength due to gaps, specifically with larger gap sizes showing higher knockdown. Overlaps, on the other hand, may provide improvement in tensile properties and show negligible change in compressive properties. Digital image correction (DIC), in situ inspection with edge cameras and post-test microscopy analyses provide a detailed insight into the failure progression and modes.
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页数：26
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