The Experts below are selected from a list of 84456 Experts worldwide ranked by ideXlab platform
Fuhui Wang - One of the best experts on this subject based on the ideXlab platform.
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Failure Behaviour of an epoxy coating with polyaniline modified graphene oxide under marine alternating hydrostatic pressure
Surface and Coatings Technology, 2019Co-Authors: Fandi Meng, Li Liu, Ting Zhang, Yu Cui, Fuhui WangAbstract:Abstract Polyaniline (PANI) was used to modify the graphene oxide (GO) by in-situ polymerization. The Failure Behaviour of epoxy resin-based GO-PANI coating under marine alternating hydrostatic pressure (AHP) was investigated. The results indicated that PANI modification improves the dispersion of GO sheets and reduces the formation of initial surface defects, both of which significantly increase the compactness and mechanical properties of the coating. The improvement of the pigments/binder interface retards the diffusion of electrolyte and the deterioration of coating structure caused by AHP. The excellent anti-permeability of coating not only depends on the improvement of compatibility between GO and binder, but also the superior toughness provided by GO-PANI nanosheets.
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the influence of the chemically bonded interface between fillers and binder on the Failure Behaviour of an epoxy coating under marine alternating hydrostatic pressure
Corrosion Science, 2015Co-Authors: Fandi Meng, Wenliang Tian, Hang Wu, Ying Li, Fuhui Wang, Tao ZhangAbstract:Abstract The Failure Behaviour of epoxy resin-based modified mica (MM) coating has been investigated under marine alternating hydrostatic pressure (AHP). The results indicate that the chemically bonded interface forms between MM fillers and epoxy binder, which significantly enhances the compactness and the mechanical properties of coating by promoting the dispersion of fillers and reducing the defects of coating. The improvement of the fillers/binder interface weakens the permeation of water and the deterioration of coating structure which are caused by the drawing force of AHP. Hence, the performance of epoxy coating is promoted under AHP environment.
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the Failure Behaviour of an epoxy glass flake coating steel system under marine alternating hydrostatic pressure
Corrosion Science, 2014Co-Authors: Wenliang Tian, Fandi Meng, Li Liu, Ying Liu, Fuhui WangAbstract:Abstract The Failure Behaviour of an epoxy glass flake coating/steel system under marine alternating hydrostatic pressure (AHP) was studied by electrochemical impedance spectroscopy (EIS), gravimetric tests, adhesion tests and scanning electron microscopy (SEM). Results reveal that AHP promoted water transportation into the coatings, and deteriorated the interface structures of the coating/steel system, including the coating/steel interface and the pigment/binder interface in the coating body. The Failure process of the coating/steel system under marine AHP is discussed in the paper.
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The Failure Behaviour of an epoxy glass flake coating/steel system under marine alternating hydrostatic pressure
Corrosion Science, 2014Co-Authors: Wenliang Tian, Fandi Meng, Li Liu, Ying Liu, Fuhui WangAbstract:Abstract The Failure Behaviour of an epoxy glass flake coating/steel system under marine alternating hydrostatic pressure (AHP) was studied by electrochemical impedance spectroscopy (EIS), gravimetric tests, adhesion tests and scanning electron microscopy (SEM). Results reveal that AHP promoted water transportation into the coatings, and deteriorated the interface structures of the coating/steel system, including the coating/steel interface and the pigment/binder interface in the coating body. The Failure process of the coating/steel system under marine AHP is discussed in the paper.
Xuefeng Shu - One of the best experts on this subject based on the ideXlab platform.
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quasi static Failure Behaviour of pmma under combined shear compression loading
Polymer Testing, 2015Co-Authors: Tao Jin, Zhiwei Zhou, Zhihua Wang, Zhenguo Liu, Xuefeng ShuAbstract:Abstract Quasi-static shear–compression tests were conducted on polymethyl methacrylate (PMMA) polymer specimens using a universal materials testing machine to investigate their Failure Behaviour under quasi-static multi-axial loading. Instead of using confining pressure, cylindrical specimens with bevelled ends of different angles (5°, 10°, 15°, 20°, 25° and 30°) were used to generate different shear stresses. In addition, a cylindrical specimen with no bevelled ends and a hat specimen of PMMA were applied in the quasi-static shear–compression tests to determine the compression and shear strengths of PMMA, respectively. Experimental results show that the Failure force of PMMA decreased as the tilt angle of the specimen increased. Furthermore, the Failure locus of the material can be predicted using a macroscopic Failure criterion with an elliptical shape. The deformation modes of each type of PMMA specimen under quasi-static loading were determined.
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Quasi-static Failure Behaviour of PMMA under combined shear–compression loading
Polymer Testing, 2015Co-Authors: Tao Jin, Zhiwei Zhou, Zhihua Wang, Zhenguo Liu, Xuefeng ShuAbstract:Abstract Quasi-static shear–compression tests were conducted on polymethyl methacrylate (PMMA) polymer specimens using a universal materials testing machine to investigate their Failure Behaviour under quasi-static multi-axial loading. Instead of using confining pressure, cylindrical specimens with bevelled ends of different angles (5°, 10°, 15°, 20°, 25° and 30°) were used to generate different shear stresses. In addition, a cylindrical specimen with no bevelled ends and a hat specimen of PMMA were applied in the quasi-static shear–compression tests to determine the compression and shear strengths of PMMA, respectively. Experimental results show that the Failure force of PMMA decreased as the tilt angle of the specimen increased. Furthermore, the Failure locus of the material can be predicted using a macroscopic Failure criterion with an elliptical shape. The deformation modes of each type of PMMA specimen under quasi-static loading were determined.
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Failure Behaviour of Sandwich Beam Subjected to Projectile Impact
Advanced Materials Research, 2011Co-Authors: Li Qing Meng, Shi Zhe Chen, Xuefeng ShuAbstract:Aerodynamic gun impact test is carried out to investigate sandwich beam with metallic skin and Nomex honeycomb core damage mechanism and Failure Behaviour. Details of the deformation and damage progression within the sandwich beam are observed in particular. The comparisons between the two kinds of specimen with different thickness skins clearly show that the difference in the impact energy consumed in global bending deformation and the localized indentation. Theoretical elastic bending stiffness of the sandwich beam with thicker skins is approximately 2.26 times greater than that of sandwich beam with thinner skins.
Wenliang Tian - One of the best experts on this subject based on the ideXlab platform.
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the influence of the chemically bonded interface between fillers and binder on the Failure Behaviour of an epoxy coating under marine alternating hydrostatic pressure
Corrosion Science, 2015Co-Authors: Fandi Meng, Wenliang Tian, Hang Wu, Ying Li, Fuhui Wang, Tao ZhangAbstract:Abstract The Failure Behaviour of epoxy resin-based modified mica (MM) coating has been investigated under marine alternating hydrostatic pressure (AHP). The results indicate that the chemically bonded interface forms between MM fillers and epoxy binder, which significantly enhances the compactness and the mechanical properties of coating by promoting the dispersion of fillers and reducing the defects of coating. The improvement of the fillers/binder interface weakens the permeation of water and the deterioration of coating structure which are caused by the drawing force of AHP. Hence, the performance of epoxy coating is promoted under AHP environment.
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the Failure Behaviour of an epoxy glass flake coating steel system under marine alternating hydrostatic pressure
Corrosion Science, 2014Co-Authors: Wenliang Tian, Fandi Meng, Li Liu, Ying Liu, Fuhui WangAbstract:Abstract The Failure Behaviour of an epoxy glass flake coating/steel system under marine alternating hydrostatic pressure (AHP) was studied by electrochemical impedance spectroscopy (EIS), gravimetric tests, adhesion tests and scanning electron microscopy (SEM). Results reveal that AHP promoted water transportation into the coatings, and deteriorated the interface structures of the coating/steel system, including the coating/steel interface and the pigment/binder interface in the coating body. The Failure process of the coating/steel system under marine AHP is discussed in the paper.
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The Failure Behaviour of an epoxy glass flake coating/steel system under marine alternating hydrostatic pressure
Corrosion Science, 2014Co-Authors: Wenliang Tian, Fandi Meng, Li Liu, Ying Liu, Fuhui WangAbstract:Abstract The Failure Behaviour of an epoxy glass flake coating/steel system under marine alternating hydrostatic pressure (AHP) was studied by electrochemical impedance spectroscopy (EIS), gravimetric tests, adhesion tests and scanning electron microscopy (SEM). Results reveal that AHP promoted water transportation into the coatings, and deteriorated the interface structures of the coating/steel system, including the coating/steel interface and the pigment/binder interface in the coating body. The Failure process of the coating/steel system under marine AHP is discussed in the paper.
Majid Pouranvari - One of the best experts on this subject based on the ideXlab platform.
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Microstructure and Failure Behaviour of resistance spot welded DP980 dual phase steel
Materials Science and Technology, 2010Co-Authors: F. Nikoosohbat, Shahram Kheirandish, M. Goodarzi, Majid Pouranvari, S. P. H. MarashiAbstract:AbstractIn this research, microstructure and overload Failure Behaviour of resistance spot welded DP980 were investigated. Microstructural characterisation, microhardness test and static tensile shear test were conducted. Fusion zone size proved to be the most important controlling factor of spot weld peak load and energy absorption. The results of this study demonstrated that the conventional weld size recommendation of d=4t1/2 is not sufficient to ensure the pullout Failure mode for DP980 steel resistance spot welds during the tensile shear test. In pullout mode, generally, Failure was initiated at heat affected zone/base metal interface, where softening occurs due to the tempering of martensite. However, when heavy expulsion occurs, pullout Failure tends to be initiated at fusion zone/heat affected zone interface. It was shown that heavy expulsion and associated large electrode indentation can reduce load carrying capacity and energy absorption capability of DP980 spot welds.
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Overload Failure Behaviour of dissimilar thickness resistance spot welds during tensile shear test
Materials Science and Technology, 2010Co-Authors: S. P. H. Marashi, Majid Pouranvari, M. Salehi, A. Abedi, Saeid KavianiAbstract:AbstractResistance spot welding is the dominant process for joining sheet metals in automotive industry. Even thickness combinations are rarely used in practice; therefore, there is clearly a practical need for Failure Behaviour investigation of uneven thickness resistance spot welds. The aim of the present paper is to investigate the Failure mode and Failure mechanism of dissimilar thickness low carbon steel resistance spot welds during tensile shear overload test. Microstructural investigations, microhardness tests and tensile shear tests were conducted. Mechanical properties of the joints were described in terms of peak load, energy absorption and Failure mode. In order to understand the Failure mechanism, micrographs of the cross-sections of the spot welded joints during and after tensile shear are examined by optical microscopy. It was found that for well established weld nuggets, the final solidification line is located in the geometrical centre of the joint. In pull-out Failure mode, Failure is ini...
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Relationship between Failure Behaviour and weld fusion zone attributes of austenitic stainless steel resistance spot welds
Materials Science and Technology, 2008Co-Authors: Pirooz Marashi, Majid Pouranvari, A. Abedi, S. M. H. Sanaee, S. H. Abootalebi, M. GoodarziAbstract:AbstractResistance spot welding was used to join austenitic stainless steel sheets. Mechanical properties of the spot welds were evaluated using tensile shear test. Mechanical Behaviour was described by peak load, Failure energy and Failure mode. The relationship between weld fusion zone attributes and Failure Behaviour was studied. Generally, it was observed that increasing fusion zone size is accompanied by an increase in load carrying capacity and energy absorption capability. However, when expulsion occurs, despite almost constant weld fusion zone size, energy absorption capability reduces significantly due to increase in electrode indentation depth. Considering the Failure location and Failure mechanism in the tensile shear test, minimum required fusion zone size to ensure the pull-out Failure mode was estimated using an analytical model. According to this model, in addition to sheet thickness, ratio of fusion zone hardness to Failure location hardness is the key metallurgical factor governing failur...
S. P. H. Marashi - One of the best experts on this subject based on the ideXlab platform.
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Microstructure and Failure Behaviour of resistance spot welded DP980 dual phase steel
Materials Science and Technology, 2010Co-Authors: F. Nikoosohbat, Shahram Kheirandish, M. Goodarzi, Majid Pouranvari, S. P. H. MarashiAbstract:AbstractIn this research, microstructure and overload Failure Behaviour of resistance spot welded DP980 were investigated. Microstructural characterisation, microhardness test and static tensile shear test were conducted. Fusion zone size proved to be the most important controlling factor of spot weld peak load and energy absorption. The results of this study demonstrated that the conventional weld size recommendation of d=4t1/2 is not sufficient to ensure the pullout Failure mode for DP980 steel resistance spot welds during the tensile shear test. In pullout mode, generally, Failure was initiated at heat affected zone/base metal interface, where softening occurs due to the tempering of martensite. However, when heavy expulsion occurs, pullout Failure tends to be initiated at fusion zone/heat affected zone interface. It was shown that heavy expulsion and associated large electrode indentation can reduce load carrying capacity and energy absorption capability of DP980 spot welds.
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Overload Failure Behaviour of dissimilar thickness resistance spot welds during tensile shear test
Materials Science and Technology, 2010Co-Authors: S. P. H. Marashi, Majid Pouranvari, M. Salehi, A. Abedi, Saeid KavianiAbstract:AbstractResistance spot welding is the dominant process for joining sheet metals in automotive industry. Even thickness combinations are rarely used in practice; therefore, there is clearly a practical need for Failure Behaviour investigation of uneven thickness resistance spot welds. The aim of the present paper is to investigate the Failure mode and Failure mechanism of dissimilar thickness low carbon steel resistance spot welds during tensile shear overload test. Microstructural investigations, microhardness tests and tensile shear tests were conducted. Mechanical properties of the joints were described in terms of peak load, energy absorption and Failure mode. In order to understand the Failure mechanism, micrographs of the cross-sections of the spot welded joints during and after tensile shear are examined by optical microscopy. It was found that for well established weld nuggets, the final solidification line is located in the geometrical centre of the joint. In pull-out Failure mode, Failure is ini...
