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Structural Performance of Light Weight Multicellular FRP Composite Bridge Deck Using Finite Element Analysis

Journal of Wuhan University of Technology(Materials Science) 2012年第5期27卷 939-943页

作者： woraphot prachasaree Pongsak Sookmanee Department of Civil Engineering Faculty of EngineeringPrince of Songkla University

Fiber reinforced polymer （FRP） composite materials having advantages such as higher strength to weight than conventional engineering materials, non-corrosiveness and modularization, which should help engineers to obtain more efficient and cost effective structural materials and systems. Currently, FRP composites are becoming more popular in civil engineering applications. The objectives of this research are to study performance and behavior of light weight multi-cellular FRP composite bridge decks （both module and system levels） under various loading conditions through finite element modeling, and to validate analytical response of FRP composite bridge decks with data from laboratory evaluations. The relative deflection, equivalent flexural rigidity, failure load （mode） and load distribution factors （LDF） based on FE results have been compared with experimental data and discussed in detail. The finite element results showing good correlations with experimental data are presented in this work.

关键词： fiber reinforced polymer (FRP) composites bridge deck finite element

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Effect of Post-weld Heat Treatment on Microstructure and Mechanical Properties of Friction Stir Welded SSM7075 Aluminium Alloy

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Journal of Wuhan University of Technology(Materials Science) 2017年第6期32卷 1420-1425页

作者： PRAPAS Muangjunburee JENNARONG Naktewan woraphot prachasaree Department of Mining and Materials Engineering Faculty of Engineering Prince of Songkla University Hatyai Songkhla 90112 Thailand Department of Civil Engineering Faculty of Engineering Prince of Songkla University Hatyai Songkhla 90112 Thailand

7XXX series aluminium alloys generally present low weldability by fusion welding methods because of the sensitivity to weld solidification cracking, vaporization of strengthening alloys and other defects in the fusion zone. Friction stir welding（FSW） can be deployed successfully with aluminium alloys. We presented the effect of post-weld heat treatment（PWHT） on the microstructure and mechanical properties of SSM7075 joints. Semi solid plates were butt-welded by FSW at a rotation speed of 1110 r/min, welding speeds of 70 and 110 mm/min. Solution treatment, artificial aging, and T6（solution treatment and artificial aging combined） were applied to the welded joints, each with three samples. It was found that the T6 joints at the speed of 70 mm/min yielded the highest tensile strength of 459.23 MPa. This condition best enhanced the mechanical properties of FSW SSM7075 aluminium alloy joints.

关键词： friction stir welding (FSW) SSM7075 aluminium alloy post-weld heat treatment (PWHT)

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