Iwahori, Yutaka
(Composite Technology Center, Japan Aerospace Exploration Agency, 6-13-1 Osawa, Mitaka-shi, 181-0015 Tokyo, Japan)
,
Nakane, Kozue
(Department of Aerospace Engineering, Faculty of System Design, Tokyo Metropolitan University, Japan)
,
Watanabe, Naoyuki
(Department of Aerospace Engineering, Faculty of System Design, Tokyo Metropolitan University, Japan)
AbstractA simulation model for the delamination extension of stitched CFRP laminates and 3-D orthogonal interlocked fabric composites (3-D OIFC) has been developed using a 2-D finite element method incorporating interlaminar tension test results to simulate the experimental results of their DCB test...
AbstractA simulation model for the delamination extension of stitched CFRP laminates and 3-D orthogonal interlocked fabric composites (3-D OIFC) has been developed using a 2-D finite element method incorporating interlaminar tension test results to simulate the experimental results of their DCB tests. The mechanical properties of through-the-thickness fiber were determined from the results of interlaminar tension tests in which the specimen included only one through-the-thickness yarn. The fracture phenomena around the through-the-thickness thread, such as debonding from the in-plane layer, slack absorption, fiber bridging, and the pull-out of broken threads from the in-plane layers, are also introduced into the FEM model. The present FEM simulation results were compared to DCB test results for certain stitched laminates and a 3-D OIFC, and the simulation results showed good agreement with the experimental results of DCB tests, including the load–displacement curve and Mode I strain energy release rate (GI). While it was difficult to estimate GI accurately when the DCB test specimen included different types of z-fiber fracture modes, the present model of FEM analysis can simulate the experimental results of DCB tests of stitched laminates and 3-D OIFC. It is suggested that the GI of CFRP with arbitrary z-fiber densities can be predicted by using this FEM analysis model together with interlaminar tension test results.
AbstractA simulation model for the delamination extension of stitched CFRP laminates and 3-D orthogonal interlocked fabric composites (3-D OIFC) has been developed using a 2-D finite element method incorporating interlaminar tension test results to simulate the experimental results of their DCB tests. The mechanical properties of through-the-thickness fiber were determined from the results of interlaminar tension tests in which the specimen included only one through-the-thickness yarn. The fracture phenomena around the through-the-thickness thread, such as debonding from the in-plane layer, slack absorption, fiber bridging, and the pull-out of broken threads from the in-plane layers, are also introduced into the FEM model. The present FEM simulation results were compared to DCB test results for certain stitched laminates and a 3-D OIFC, and the simulation results showed good agreement with the experimental results of DCB tests, including the load–displacement curve and Mode I strain energy release rate (GI). While it was difficult to estimate GI accurately when the DCB test specimen included different types of z-fiber fracture modes, the present model of FEM analysis can simulate the experimental results of DCB tests of stitched laminates and 3-D OIFC. It is suggested that the GI of CFRP with arbitrary z-fiber densities can be predicted by using this FEM analysis model together with interlaminar tension test results.
Watanabe N, Oshiba S, Ishikawa T. In-plane mechanical properties of CF/Epoxy 3-D orthogonal interlocked fabric composite. In: Proceedings of international conference composite materials, Paris, France; 1999.
Ishikawa H, Ji M, Anahara M, Yasui Y. The estimation of fracture of orthogonal three dimensional fiber-reinforced composite by DCB testing. In: Proceedings of 71st annual general meeting of the Japan society of mechanical engineers, Tokyo, Japan; 1994. p. 455-7 [in Japanese].
Ishikawa T, Matsushima M, Bansaku K, Watanabe N, Sunakawa M. Experimental results of interlaminar fracture toughness and in-plane strength of 3-D woven carbon/epoxy plates. In: Proceedings of seminar of the Japan society for composite materials, Tokyo, Japan; 1996. p. 51-2 [in Japanese].
10.2514/6.1996-1418 Watanabe N, Tanzawa Y. Delamination analysis of 3-D orthogonal interlocked fabric composite. In: Proceedings of 37th AIAA SDM conference, Salt Lake City, USA; 1996. p. 877-85.
10.2514/6.1999-1246 Watanabe N, Tanzawa Y, Ishikawa T. FEM simulation of modified DCB test for 3-D orthogonal interlocked fabric composite. In: Proceedings of 40th AIAA SDM conference, St. Louis, Missouri, USA, AIAA-99-1246; 1999.
Compos Sci Technol Tanzawa 61 1097 2001 10.1016/S0266-3538(01)00003-3 FEM simulation of a modified DCB test for 3-D orthogonal interlocked fabric composite
10.2514/6.2000-1616 Watanabe N, Nishii N. DCB test and analysis of new 3-D orthogonal interlocked fabric composite FEM simulation of modified DCB test for 3-D orthogonal interlocked fabric composite. In: Proceedings of 41st AIAA SDM conference, Atlanta, Georgia, USA; 2000.
Eng Fract Mech Rybicki 9 931 1997 10.1016/0013-7944(77)90013-3 A finite element calculation of stress intensity factors by a modified crack closure integral
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