Notch effects and crack propagation analysis on kenaf/polypropylene nonwoven composites |
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| Affiliation: | 1. Texas Materials Institute Materials Science and Engineering Program, The University of Texas at Austin, Austin, TX 78712, USA;2. Department of Aerospace Engineering and Engineering Mechanics, The University of Texas at Austin, Austin, TX 78712, USA;3. School of Human Ecology, The University of Texas at Austin, Austin, TX 78712, USA;1. Instituto Nacional del Carbón, INCAR-CSIC, Apartado 73, 33080 Oviedo, Spain;2. Instituto de Ciencia y Tecnología de Polímeros, ICTP-CSIC, C/Juan de la Cierva 3, 28006 Madrid, Spain;1. Mathematics Institute, University of Warwick, Coventry, CV4 7AL, UK;2. Laboratory of Differential Equations and Related Problems of Analysis, Sobolev Institute of Mathematics, Koptuyg Avenue, 4, Novosibirsk 630090, Russia;3. Novosibirsk State University, Russia;1. Department of Physics, Guizhou university, Guiyang 550025, China;2. Institute of Physics, Academia Sinica, Taiwan;3. Department of Physics, Beijing Normal University, Beijing 100875, China;1. Central Research Laboratory, Daiwa House Industry Co., Ltd., 6-6-2, Sakyo, Nara City, 631-0801, Japan;2. Development Group, Okayama Plant, Kuraray Kuraflex Co., Ltd., 2-4-9, Kaigandori, Minami-ku, Okayama, 702-8045, Japan;1. College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China;2. National Engineering Research Center of Electronic Circuits Base Materials, 523039, China |
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| Abstract: | This paper has studied the open-hole and pin filled-hole effects on the tensile properties of Kenaf/Polypropylene Nonwoven Composites (KPNCs) in production of automotive interior parts. The influence of specimen width-to-hole diameter (W/D) ratios of 6, 3, and 2 on failure load was studied. Two sample thicknesses of 3 mm and 6 mm were evaluated. Mechanical properties of the KPNCs in terms of uniaxial tensile, open-hole tensile (OHT), and pin filled-hole tensile (FHT) were measured experimentally. A preliminary model by extended finite element method (XFEM) was established to predict the failure load and simulate crack propagation of 3 mm thick open-hole and pin filled-hole specimens. Good agreement was found between experimental and simulation results. By calculating the stress concentration factor Kt for brittle materials, the net section stress factor Kn for ductile materials, and the strength reduction factor Kr, it was found that KPNC was relatively ductile and insensitive to the notch. |
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| Keywords: | A. Fibers A. Fabrics/textiles C. Finite element analysis (FEA) D. Mechanical testing |
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