Abstract
During the fiber preform loading process of resin transfer moldings (RTMs), fabric layers can be wrinkled in the preform, which affects the quality of the composite. This study considers several wrinkled models with different wrinkled lengths (L W ) and different numbers of wrinkled layers in the preform. To study the effects of wrinkling on tensile properties, two matrix materials with different moduli are used to enhance understanding. It is found that the tensile moduli of wrinkled models are lower than those of the normal model, for the same fiber volume fraction (V f ). The effects of wrinkling on the tensile modulus increase with the number of layers as well as V f . In addition, the effect of wrinkling with a low-modulus matrix on the tensile modulus is larger than that with a high-modulus matrix in the composite. Based on the failure modes and the stiffness of materials, the failure mechanisms of wrinkled models can be separated into two regimes as a function of wrinkled length, L W , depending on the critical wrinkled length (L WC ).
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This paper was recommended for publication in revised form by Associate Editor Chongdu Cho
Thanh Trung Do received his B.S. in Mechanical Engineering from University of Technical Education HoChiMinh City in Vietnam on March 2000. He then received his M.S. degree on September 2003 and Ph.D. degree on August 2009 from Yeungnam University, Korea, where he is currently post-doctoral fellow. He is also member of University of Technical Education HoChiMinh City, Vietnam. His research interests focus on polymer matrix composites and experimental mechanics.
Dong Joo Lee received his B.E. in Mechanical Engineering from Yeungnam University, Korea, in 1979. He then received his M.S. and Ph.D. degrees from University of Massachusetts at Amherst in 1983 and 1987, respectively. Between 1987 and 1992, he was a research scientist at Honeywell Inc. in N.J. He is currently a Professor at the School of Mechanical Engineering at Yeungnam University. His research interests focus on polymer matrix composites, experimental mechanics and smart materials.
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Do, T.T., Lee, D.J. Analysis of tensile properties for composites with wrinkled fabric. J Mech Sci Technol 24, 471–479 (2010). https://doi.org/10.1007/s12206-009-1207-5
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DOI: https://doi.org/10.1007/s12206-009-1207-5