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Investigation of Physical, Mechanical Properties and Long-Term Creep Behavior of Wengé Wood (WW)
Applied Engineering
Volume 4, Issue 2, December 2020, Pages: 27-34
Received: May 22, 2020; Accepted: Jun. 8, 2020; Published: Jun. 16, 2020
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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
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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
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Njankouo Jacques Michel, Atchounga Kuida Prisca, Foadieng Emmanuel, Kamdjo Grégoire, 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. doi: 10.11648/
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