03787nas|a2200421 i 4500 20260818113852.0 030815s2003 th uzm rtt 00| a1eng d .b11894052 AIT Thesis no.ST-03-20 Fung, Ngo Cheng Finite element analysis of vetiver grass composite structures Bangkok : Asian Institute of Technology, 2003 64 leaves Thesis ; no. ST-03-20 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology Thesis (M.Eng.) - Asian Institute of Technology, 2003 A mathematical framework has been introduced to investigate the behaviour of composite structures subject to incremental vertical loading. An analytical method has been described to predict the nine effective elastic moduli of an orthotropic composite bundle comprised of vetiver grass fibers and clay matrix. Both constituents are assumed to behave as isotropic linear elastic-brittle materials. These moduli are given in terms of the properties of both constituents as well as the cross-sectional aspect ratio and the volume fraction of the inclusions. A composite wall panel is made up of two different materials, namely vetiver grass composite bundles and clay paste joints arranged in a periodic way as a continuum. The vetiver grass composite bundles can be regarded as orthotropic elasticbrittle materials. For modelling the behaviour of wall panels, a two-stage homogenization procedure is used to obtain the average mechanical response of the composite wall panels. In the first step, composite bundles are homogenized with vertical joints to give equivalent elastic properties of a stacked system. Next, this stacked system is homogenized with horizontal joints to obtain equivalent material properties for the wall panels. This constitutive model can be incorporated into existing numerical packages to analyse vertically loaded wall panels. Three dimensional finite element analyses utilizing eightnoded solid elements are implemented in this study. The failure criterion based on the characteristic tensile strength of the composite bundles has been proposed to predict the compressive strength of wall panels. The results obtained from finite element analysis have been verified and validated with some limited experimental data, which showed a reasonable agreement. The finite element model can be used for predicting the behaviour of vetiver grass composite structures of arbitrary geometry and boundary conditions. A design of a single-story house based on this model is proposed. Finite element method Compositae Vetiver Barry, William Joseph, Chairperson Pichai Nimityongskul, Examination Committee Kim, Kidu, Examination Committee Lee Foundation, Scholarship donor Asian Institute of Technology-Partial Scholarship, Scholarship donor Asian Institute of Technology. Thesis ; no. ST-03-20 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B08913 .b11894052 mnait u 240404 0 030815 m a u 0 mnait mnarc 22 40 Barcode : 30050120745517 CREATED : 2014-04-29 RECORD # : i12792779 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160067681 CREATED : 2016-04-19 RECORD # : i12937617 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 44868 44868 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.ST-03-20 30050120745517 2026-08-18 11:38:52 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.ST-03-20 30050160067681 2026-08-18 11:38:52 1 2026-08-18 40