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Numerical Simulations of Azobé/Urea Formaldehyde Wood Plastic Composite Behaviors under Charpy Impact and Low-Velocity Drop Weight Tests

1
Laboratory of Analyses Simulations and Testing, Institute of Technology, The University of Ngaoundéré, P.O. Box 455 Ngaoundéré, Cameroon
2
Laboratoire de Mécanique et Productique (LMP), UFD SI, Université de Douala, P.O. Box 24157 Douala, Cameroon
3
Laboratory of Mechanics, Materials and Photonics, Faculty of Sciences, The University of Ngaoundéré, P.O. Box 455 Ngaoundéré, Cameroon
*
Author to whom correspondence should be addressed.
J. Compos. Sci. 2018, 2(4), 60; https://doi.org/10.3390/jcs2040060
Received: 14 August 2018 / Revised: 2 October 2018 / Accepted: 13 October 2018 / Published: 17 October 2018
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Abstract

This work is concerned with the study of the influence of impactor’s velocity parameters, impactor’s geometry, the target plate properties, and thickness, on the response of a tropical wood plastic composite (WPC) Azobé/urea formaldehyde (Az/UF) plate under impact loading. Variations of the impact force, displacement, deformation, and impact energy of the specimens with weight fractions of 10, 20, 30, 40, and 50% have been considered in finite element analysis (FEA) simulations. The simulations of the Charpy and of a drop weight impact test on the WPC were carried out using the explicit dynamics module of ANSYS Workbench, which handles problems of dynamic loading of a short duration for 2D and 3D analyses. Contact laws that account for the compressibility of the interacting bodies (the standard steel impactor and the WPC target plate), have been used. The results show that the displacements decrease in contrast to the increase of the wood filler content, and vary in the 6.8–9.0 mm interval. From an energetic point of view, it is observed that the maximum absorbed energy is between 40 and 50% for the Azobe flour wt.%, with energy absorption rates of 28% and 26% of the total energy. These results are in agreement with those reported in previous experimental investigations on hybrid WPCs filled with wood flour and glass fibers, which produce an energy absorption rate of 24–26%. These results promote the applicability of Azobé tropical wood in fabricating WPCs for impact loading situations. View Full-Text
Keywords: tropical wood plastic composites; low-velocity drop weight impact test; Charpy impact test; numerical simulations tropical wood plastic composites; low-velocity drop weight impact test; Charpy impact test; numerical simulations
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Ntenga, R.; Lahe, S.F.; Atangana Ateba, J.; Beda, T. Numerical Simulations of Azobé/Urea Formaldehyde Wood Plastic Composite Behaviors under Charpy Impact and Low-Velocity Drop Weight Tests. J. Compos. Sci. 2018, 2, 60.

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