02851nas a2200373 a 4500 20260818090705.0 260202s20259999th u ms t 000 eng d .b12474071 AIT Thesis no.ST-25-10 Weijie, Lim Development of a novel finite rigid body element with embodied continuum theory Pathum Thani, Thailand : Asian Institute of Technology, 2025 128 leaves : ill.+ 1 online resource Thesis ; no. ST-25-10 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Structural Engineering Thesis (M. Eng.) - Asian Institute of Technology, 2025 This study presents a novel finite rigid body formulation derived from continuum mechanics principles, enabling accurate lateral deformation prediction without iterative calculations. By adapting finite element method (FEM) continuum derivations, the proposed approach achieves explicit modeling of Poisson-induced deformations in rigid body systems{u2014}a longstanding challenge in computational mechanics. The framework is validated through numerical biaxial and uniaxial compression tests on concrete specimens, demonstrating exact agreement with theoretical elastic-stage predictions (e.g., lateral strain matching p*f{u2093} for p = 0.2).Key innovations include: (1) a non-iterative deformation mapping technique that preserves volume constraints, and (2) a mechanical-based stiffness formulation bridging rigid body dynamics and continuum response. Results show {u2264}5% error in Von Mises stress capture compared to analytical solutions, outperforming conventional rigid body methods that require ad-hoc Poisson coupling. This work advances multiscale modeling by enabling efficient rigid-body-scale simulations with inherent continuum deformation properties, particularly beneficial for quasi-brittle materials like concrete under service loads. Mechanics of materials Dynamics, Rigid Krishna, Chaitanya, Chairperson Pennung Warnitchai, Examination Committee Raktipong Sahamitmongkol, Examination Committee Anwar, Naveed, Examination Committee BRIDGEX BINA SDN BHD, Malaysia, Scholarship Donor Asian Institute of Technology. Thesis ; no. ST-25-10 Full-Text http://203.159.5.9/ait-thesis/Viewer/viewer.php?id=B23413 .b12474071 mnarc a 260209 0 260205 m h a 0 mnarc 67 Barcode : - CREATED : 2026-02-02 RECORD # : i1357064x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 28879 28879 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.ST-25-10 2026-08-18 09:07:05 1 2026-08-18 67