Investigation of Physical, Mechanical Properties and Long-Term Creep Behavior of Wengé Wood (WW)
Volume 4, Issue 2, December 2020, Pages: 27-34
Received: May 22, 2020;
Accepted: Jun. 8, 2020;
Published: Jun. 16, 2020
Views 46 Downloads 19
Njankouo Jacques Michel, Wood Engineering Department, Higher Technical Teacher Training College (HTTTC), University of Yaoundé I, Ebolowa, Cameroon
Atchounga Kuida Prisca, Physics Department, University of Dschang, Mechanics and Modeling of Physical Systems Research Unit (UR-2MSP), Dschang, Cameroon
Foadieng Emmanuel, Civil Engineering Department, Higher Technical Teacher Training College (HTTTC), University of Buéa, Kumba, Cameroon
Kamdjo Grégoire, Civil Engineering Department, Fotso Victor Institute of Technology (IUT-FV), University of Dschang, Bandjoun, Cameroon
Talla Pierre Kisito, Physics Department, University of Dschang, Mechanics and Modeling of Physical Systems Research Unit (UR-2MSP), Dschang, Cameroon
Follow on us
In this research work aiming at determining the physical and mechanical properties of the wood species Wengé, attention has also been paid to its creep behavior through an accelerated test technic. It came out from experimental studies that Wengé wood exhibits good dimensional stability parameters and good mechanical characteristics. Meanwhile, classical creep tests are both time consuming and cost intensive because of their long test time. Hence accelerated creep tests are used to extrapolate the information to the time scale of conventional tests on measurements conducted for much shorter durations. In this research work, we also demonstrate the use of stepped isostress method (SSM) in 4-point bending mode as a means of accelerated creep measurement of the wood species Millettia Laurentii called Wengé. The SSM employs a load-stepping approach, typically with at least three steps for a single specimen. The tests have been carried out at temperature of 23°C and 65% relative humidity. The flexural properties of the wood were determined. The master curve obtained can be used for predicting the creep behavior of the test material for time periods more exceeding the experimental one. Besides, from the Eyring theory on creep we calculated the activation volume of the Millettia Laurentii wood. Of course these findings clearly indicate that the reduction modulus of the wood species Millettia Laurentii in this work is increasing over time but at a decreasing rate.
Wood, Millettia Laurentii, Creep, Activation Volume, Stepped Isostress Method, Four-point Bending Test
To cite this article
Njankouo Jacques Michel,
Atchounga Kuida Prisca,
Talla Pierre Kisito,
Investigation of Physical, Mechanical Properties and Long-Term Creep Behavior of Wengé Wood (WW), Applied Engineering.
Vol. 4, No. 2,
2020, pp. 27-34.
Copyright © 2020 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/
) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Patrick Martin; Michel Vernay. Guide d’utilisation des bois africains éco-certifiés. Tome 1. ISBN: 979-10-94-410-01-1.
Foadieng, E.; Atchounga, K. P.; Talla, P. K. Fractional calculus approach to investigation of creep behavior of Wengé Wood (Millettia Laurentii). International Journal of Innovative Science, Engineering & Technology 2019, Vol. 6 Issue 8, 58-68.
Carneiro, M.; Magalhaes, W.; de Muniz, G.; Schimleck, L. Near infrared spectroscopy and chemometrics for predicting specific gravity and flexural modulus of elasticity of Pinus spp. Veneers. J. Infrared Spectrosc 2010a. 18,481. https://doi.org/10.1255/jnirs.911.
Chih-Lung, Cho. Comparison of three methods for determining Young’s Modulus of Wood. Taiwan Journal foe science 2007. 22 (3): 297-306.
Tajvidi, M.; Simon, L. C. High-temperature creep behavior of wheat straw isotactic/impact-modified polypropylene composites. J. Thermoplast. Compos. 2015, 28, 1406-1422.
Hadid, M.; Guerira, B.; Bahri, M.; Zouani, A. Assessment of the stepped isostress method in the prediction of long term creep of thermoplastics. Polym. Test. 2014, 34, 113–119.
Dasappa, P.; Lee-Sullivan, P.; Xiao, X. Temperature effects on creep behavior of continuous fiber GMT composites. Compos. Part A 2009, 40, 1071–1081.
Jones, C. J. F. P.; Clarke, D. The residual strength of geosynthetic reinforcement subjected to accelerated creep testing and simulated seismic events. Geotext. Geomembr. 2007, 25, 155–169.
Alwis, K. G. N. C.; Burgoyne, C. J. Accelerated creep testing for aramid fibres using the stepped isothermal method. J. Mater. Sci. 2008, 43, 4789–4800.
Yeo, S. S.; Hsuan, Y. G. Evaluation of creep behavior of high density polyethylene and polyethylene-terephthalate geogrids. Geotext. Geomembr. 2010, 28, 409–421.
Achereiner, F.; Engelsing, K.; Bastian, M.; Heidemeyer, P. Accelerated creep testing of polymers using the stepped isothermal method. Polym. Test. 2013, 32, 447–454.
Hadid, M.; Rechak, S.; Tati, A. Long-term bending creep behavior prediction of injection molded composite using stress-time correspondence principle. Mater. Sci. Eng. A Struct. 2004, 385, 54–58.
Giannopoulos, I. P.; Burgoyne, C. J. Prediction of the long-term behaviour of high modulus fibres using the stepped isostress method (SSM). J. Mater. Sci. 2011, 46, 7660–7671.
Giannopoulos, I. P.; Burgoyne, C. J. Accelerated and real-time creep and creep-rupture results for aramid fibers. J. Appl. Polym. Sci. 2012, 125, 3856–3870.
Schapery, R. A. On the characterization of nonlinear viscoelastic materials. Polym Eng Sci 1969; 9 (4): 295–310.
Yang, T. C.; Wu, T. L.; Hung, K. C.; Chen, Y. L.; Wu, J. H. Mechanical properties and extended creep behavior of bamboo fiber reinforced recycled poly (lactic acid) composites using the time-temperature superposition principle. Constr. Build. Master. 2015, 93, 558–563.
Truhlar, D. G.; Garrett, B. C.; Klippenstein, S. J. J Phys Chem. 1996, 100 (31): 12771.