Effect of Interlayer Delamination on Mechanical Behavior of Carbon/Epoxy Laminates

被引:61
|
作者
Reis, P. N. B. [1 ]
Ferreira, J. A. M. [2 ]
Antunes, F. V. [2 ]
Richardson, M. O. W. [3 ]
机构
[1] Univ Beira Interior, Dept Engn Electromecan, Covilha, Portugal
[2] Univ Coimbra, Dept Engn Mecan, ICEMS, P-3000 Coimbra, Portugal
[3] Univ Portsmouth, Dept Mech & Design Engn, RCMI, Portsmouth PO1 2UP, Hants, England
关键词
laminated composites; carbon fibers; fatigue damage; residual stiffness; VELOCITY IMPACT DAMAGE; COMPRESSIVE STRENGTH; FIBER COMPOSITES; TENSILE PROPERTIES; FATIGUE BEHAVIOR; PREDICTION; FAILURE; CFRP; LIFE;
D O I
10.1177/0021998309344649
中图分类号
TB33 [复合材料];
学科分类号
摘要
This article presents the results of a current study on the influence of interlayer delaminations on the static and fatigue behavior of composite laminates. The composite was manufactured by a vacuum molding method using 12 balanced bi-directional carbon fiber layers and epoxy resin. Delaminations with different length were artificially introduced. The specimens with dog bone shape were cut from the original plates having 3 mm thickness and fiber weight fraction of 0.66. Static tests were performed in order to study the influence of delamination size on the laminate stiffness and strength. Complementary finite element analysis was carried out showing the influence of angular misalignments of fiber/matrix delaminations on the laminate stiffness. Fatigue tests were performed in load control for R = 0.05 and R = -1, with a loading frequency of 10 Hz, at room temperature. The artificial interlayer delaminations have a negligible influence on the fatigue strength for tensile cycle loadings, but produce significant decreases in strength for R = -1 fatigue loadings.
引用
收藏
页码:2609 / 2621
页数:13
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