Study of the Appropriate Factors for Laminated Bamboo Bending by Design of Experiments

Abstract

Abstract — This research studied the appropriate factors and conditions for laminated bamboo bending by Design of Experiments (DOE). The interested factors affecting the spring back in laminates bamboo were (1) time, (2) thickness, and (3) frequency. This experiment tested the specimen by using high frequency machine and measured its spring back immediately and next 24 hours for comparing the spring back ratio. Results from the experiments showed that significant factors having major influence to bending of laminates bamboo were thickness and frequency. The appropriate conditions of thickness and frequency were 4 mm. and 1.5 respectively. Keywords — Bamboo, Bending, Spring Back, Design of Experiments (DOE). I. I NTRODUCTION HE greenhouse effect caused by the increasing CO 2 concentration in the atmosphere is predicted to produce drastic changes in the global climate. Forests, especially tropical rain forests, are the most important ecosystems for CO 2 fixation and therefore forests should be well managed. To save the forest, it is not appropriate to use wood as a structural material. For this reason, bamboo has attracted much attention during recent years. Apart from being one of the fastest growing plants, so that harvest time can be short, bamboo has such attractive features as high specific strength and modulus, low density and, as a natural material, its degradability. Recently, the use of bamboo has been expanded to include its manufacture into various structural composite products [1, 2]. Previous studies showed that Dendrcalamus asper Backer bamboo’s favorable mechanical properties make it a premising material for the manufacture of various engineered laminated products, such as laminated bamboo armchair [3].