Investigation of Fracture Toughness of Laminated Stitched Composites Subjected to Mixed Mode Loading

被引:14
作者
Rys, Tomek [1 ]
Sankar, Bhavani V. [1 ]
Ifju, Peter G. [1 ]
机构
[1] Univ Florida, Dept Mech & Aerosp Engn, Gainesville, FL 32611 USA
关键词
polymer-matrix composites; fracture toughness; delamination; stitching; Mode I; Mode II;
D O I
10.1177/0731684408099407
中图分类号
TB33 [复合材料];
学科分类号
摘要
Through-the-thickness stitching is a method that increases the translaminar strength and apparent fracture toughness of laminated composites. A novel test fixture was developed to measure mixed mode fracture toughness under combined Mode I and Mode II loadings. This fixture allowed the ratio between Mode I and Mode II to be varied in order to perform tests under a wide range of mixed mode conditions. Through testing it has been shown that stitching increases Mode I fracture toughness 20-50 times while playing a less significant role in increasing Mode II fracture toughness.
引用
收藏
页码:422 / 430
页数:9
相关论文
共 11 条
[1]  
Chen Lai, 2003, P 44 AIAA STRUCT STR, P10
[2]  
Mignery L.A., 1985, ASTM STP, V876, P371, DOI DOI 10.1520/STP36315S
[3]   MIXED-MODE BENDING METHOD FOR DELAMINATION TESTING [J].
REEDER, JR ;
CREWS, JH .
AIAA JOURNAL, 1990, 28 (07) :1270-1276
[4]  
REEDER JR, 1992, J COMPOS TECH RES, V14, P12, DOI 10.1520/CTR10078J
[5]   Interlaminar fracture toughness of GFRP influenced by fiber surface treatment [J].
Rikards, R ;
Korjakin, A .
JOURNAL OF COMPOSITE MATERIALS, 1998, 32 (17) :1528-1559
[6]   A FINITE-ELEMENT FOR MODELING DELAMINATIONS IN COMPOSITE BEAMS [J].
SANKAR, BV .
COMPUTERS & STRUCTURES, 1991, 38 (02) :239-246
[7]   Mode II delamination toughness of stitched graphite/epoxy textile composites [J].
Sankar, BV ;
Sharma, SK .
COMPOSITES SCIENCE AND TECHNOLOGY, 1997, 57 (07) :729-737
[8]   Sublaminate buckling and compression strength of stitched uniweave graphite/epoxy laminates [J].
Sharma, SK ;
Sankar, BV .
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES, 1997, 16 (05) :425-434
[9]   Effect of stitching on impact and interlaminar properties of graphite/epoxy laminates [J].
Sharma, SK ;
Sankar, BV .
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS, 1997, 10 (03) :241-253
[10]  
SHARMA SK, 1995, 195042 NASA