Polish version

Login form

register


Print

C.-L. Wei, H. Chang, Y.-C. Lee, R. Lee, T.-W. Luo, J.-H. Chen

Finite element analysis of three-point bending of a T-beam
structural biaxial highly oriented polymer material (in English)

Polimery 2018, No 3, 219


DOI: dx.doi.org/10.14314/polimery.2018.3.6

Summary

Polymers with biaxial aligned molecular chains are also orthotropic materials, which are characterized by high tensile strength and low shear strength in the length direction. When orthotropic materials are used as structural shapes with poor shear strength, they are likely to undergo premature failure under shear stress. Therefore, in three-point bending, the cross-section of the entire profile not only bears tensile stress and compressive stress in the length direction, but also simultaneously exhibits shear stress. This study analyzes the distribution of tensile stress, compressive stress and shear stress in the length direction of highly oriented polymers (HOP) by finite element analysis to find the most suitable length-to-height ratio for these materials when used as structural shapes. The finite element analysis software, Abaqus, is utilized to simulate HOP T-beam to analyze the load stress of a T-beam. With a fixed cross–section area, as the length of the material changes, its shear strength also changes. Accordingly, the order of occurrence of tensile failure and shear failure can be investigated. The simulation reveals that when the length-to-height ratio is between 4 : 1 and 20 : 1, a zone of stress in which tensile failure and shear failure occur can be found. This result can be exploited in the design and development of structural beam.
Keywords: solid phase processing, highly oriented polymer (HOP), orthotropic materials, T-beam, three-point bending, finite element
e-mail: f10381@ntut.edu.tw
C.-L. Wei, H. Chang, Y.-C. Lee, R. Lee, T.-W. Luo, J.-H. Chen (1.02 MB)
Finite element analysis of three-point bending of a T-beam structural biaxial highly oriented polymer material (in English)