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        The reliability of finite element analysis results of the low impact test in predicting the energy absorption performance of thin-walled structures

        R. Alipour,A. Farokhi Nejad,S. Izman 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.5

        The application of dual phase steels (DPS) such as DP600 in the form of thin-walled structure in automotive components is being continuouslyincreased as vehicle designers utilize modern steel grades and low weight structures to improve structural performance, makeautomotive light and reinforce crash performance. Preventing cost enhancement of broad investigations in this area can be gained byusing computers in structural analysis in order to substitute lots of experiments with finite element analysis (FEA). Nevertheless, it necessitatesto be certified that selected method including element type and solution methodology is capable of predicting real condition. Inthis paper, numerical and experimental studies are done to specify the effect of element type selection and solution methodology on theresults of finite element analysis in order to investigate the energy absorption behavior of a DP600 thin-walled structure with three differentgeometries under a low impact loading. The outcomes indicated the combination of implicit method and solid elements is in betteragreement with the experiments. In addition, using a combination of shell element types with implicit method reduces the time of simulationremarkably, although the error of results compared to the experiments increased to some extent.

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        Anti-corrosive properties of natural honey on Al–Mg–Si alloy in seawater

        R. Rosliza,W.B. Wan Nik,S. Izman,Y. Prawoto 한국물리학회 2010 Current Applied Physics Vol.10 No.3

        Anti-corrosive properties of natural honey on Al–Mg–Si alloy in seawater were evaluated by potentiodynamic polarization (PP), linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS) measurements. All the studied parameters showed good anti-corrosive properties against the corrosion of Al–Mg–Si alloy in the tested solution and their performance increases with corrosion resistant concentration. Polarization data indicated that natural honey is a mixed-type corrosion resistant. LPR and EIS studies showed that there were significant increases in the overall resistance after the addition of natural honey. The adsorption of natural honey on the metal surface obeys Langmuir adsorption isotherm. The analysis of morphology studies confirmed the formation of precipitates of natural honey on the metal surface, which reduced the overall corrosion reaction.

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