The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Hidekazu Murakawa - One of the best experts on this subject based on the ideXlab platform.
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an inverse analysis method to estimate inherent Deformations in thin plate welded joints
Materials & Design, 2012Co-Authors: Wei Liang, Hidekazu MurakawaAbstract:Abstract Weld-induced distortion occurs as an unavoidable consequence due to the intrinsic nature of non-uniform heating and fast cooling. Welding distortion not only negatively affects manufacturing accuracy, but also increases fabrication cost due to straightening work. Past researches suggest that elastic finite element method based on inherent strain theory is an effective approach to estimate welding Deformation for welded structures. However, when this method is used to simulate welding Deformation in a large or complex structure, the values of inherent Deformations in each typical joint must be known beforehand. In the present study, a new method based on inverse analysis was developed to obtain the inherent Deformations in typical welded joints. Meanwhile, the influence of weld length on welding Deformation was investigated. In addition, using the proposed method, a database of inherent Deformations in thin plate butt joints was established.
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study of welding inherent Deformations in thin plates based on finite element analysis using interactive substructure method
Materials & Design, 2009Co-Authors: Rui Wang, Jianxun Zhang, Hisashi Serizawa, Hidekazu MurakawaAbstract:Abstract The paper investigates the inherent Deformations of thin plate bead-on-plate welding with varying plate thicknesses for eight different materials. Firstly, three-dimensional (3D) thermal elastic–plastic finite element (FE) model based on interactive substructure method (ISM) is used to compute welding Deformations within practical time. Computed results are compared with experimental results. Very good correlation is obtained for temperature as well as Deformation predictions between experimental and ISM. The effectiveness of ISM is validated. Then, welding inherent Deformations are evaluated by inverse analysis using the computational results of ISM. Using inherent Deformations, weld Deformation can be estimated within shorter time by elastic-shell model. Finally, a database of inherent Deformations for eight different materials including 144 computational cases is developed. In addition, the relationship between welding heat input parameter and inherent Deformations is discussed.
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prediction of welding distortion by elastic finite element analysis using inherent Deformation estimated through inverse analysis
Welding in The World, 2005Co-Authors: Wei Liang, Dean Deng, Shinji Sone, Hidekazu MurakawaAbstract:During welding, Deformation is produced as an unavoidable consequence. The inherent Deformation method, in which the inherent Deformation is introduced into the elastic finite element method (FEM) as the initial strain, is one of the effective methods to predict the welding distortion of large structures. However, the values of the inherent Deformations for all weld joints included in the structure must be known beforehand. Generally, the inherent Deformations are influenced by various factors such as materials, welding method, welding condition, joint geometry, plate thickness, and weld length. Thus, it is meaningful to develop a simple method to obtain the inherent Deformation. In this report, a simple and efficient method to estimate inherent Deformation of typical weld joints is proposed. Further, using the estimated inherent Deformation, the welding Deformation of joint specimens and large plate structures are predicted.
Rui Wang - One of the best experts on this subject based on the ideXlab platform.
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study of welding inherent Deformations in thin plates based on finite element analysis using interactive substructure method
Materials & Design, 2009Co-Authors: Rui Wang, Jianxun Zhang, Hisashi Serizawa, Hidekazu MurakawaAbstract:Abstract The paper investigates the inherent Deformations of thin plate bead-on-plate welding with varying plate thicknesses for eight different materials. Firstly, three-dimensional (3D) thermal elastic–plastic finite element (FE) model based on interactive substructure method (ISM) is used to compute welding Deformations within practical time. Computed results are compared with experimental results. Very good correlation is obtained for temperature as well as Deformation predictions between experimental and ISM. The effectiveness of ISM is validated. Then, welding inherent Deformations are evaluated by inverse analysis using the computational results of ISM. Using inherent Deformations, weld Deformation can be estimated within shorter time by elastic-shell model. Finally, a database of inherent Deformations for eight different materials including 144 computational cases is developed. In addition, the relationship between welding heat input parameter and inherent Deformations is discussed.
Cong Huang - One of the best experts on this subject based on the ideXlab platform.
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A Study on the Mechanism and Controlling Techniques of Roadway Deformations Under High In Situ Stress Conditions
Geotechnical and Geological Engineering, 2019Co-Authors: Chao Yuan, Weijun Wang, Cong HuangAbstract:To successfully control the roadway Deformations under high in situ stress conditions, first, field investigations were conducted on the haulage roadway Deformation at the -850 section in Qu Jiang mine. Besides, an analysis was performed on the roadway Deformation characteristics. Moreover, four supporting strategies were proposed based on the geological conditions and the roadway Deformation characteristics. And these strategies were simulation using FLAC3D. Furthermore, the supporting mechanism of the first, the second and grouting supports was analyzed. The first supporting was the preliminary support installed at the stress release stage of surrounding rocks, and limited Deformations were permitted in this stage. To permanently stabilize the roadway, the second supporting then was installed to restrain the creep Deformation and improve the strength and integrity of the fissured rock masses. Grouting, which can infill and cement the fissures, was used to improve the anchor forces of the bolts and cable and promote the delivery and diffusion of the supporting resistances. Simulation results indicate that roadway Deformations are successfully controlled by the proposed strategies where bolts, steel nets, concrete spraying, cables, and grouting were applied.
Wei Liang - One of the best experts on this subject based on the ideXlab platform.
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an inverse analysis method to estimate inherent Deformations in thin plate welded joints
Materials & Design, 2012Co-Authors: Wei Liang, Hidekazu MurakawaAbstract:Abstract Weld-induced distortion occurs as an unavoidable consequence due to the intrinsic nature of non-uniform heating and fast cooling. Welding distortion not only negatively affects manufacturing accuracy, but also increases fabrication cost due to straightening work. Past researches suggest that elastic finite element method based on inherent strain theory is an effective approach to estimate welding Deformation for welded structures. However, when this method is used to simulate welding Deformation in a large or complex structure, the values of inherent Deformations in each typical joint must be known beforehand. In the present study, a new method based on inverse analysis was developed to obtain the inherent Deformations in typical welded joints. Meanwhile, the influence of weld length on welding Deformation was investigated. In addition, using the proposed method, a database of inherent Deformations in thin plate butt joints was established.
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prediction of welding distortion by elastic finite element analysis using inherent Deformation estimated through inverse analysis
Welding in The World, 2005Co-Authors: Wei Liang, Dean Deng, Shinji Sone, Hidekazu MurakawaAbstract:During welding, Deformation is produced as an unavoidable consequence. The inherent Deformation method, in which the inherent Deformation is introduced into the elastic finite element method (FEM) as the initial strain, is one of the effective methods to predict the welding distortion of large structures. However, the values of the inherent Deformations for all weld joints included in the structure must be known beforehand. Generally, the inherent Deformations are influenced by various factors such as materials, welding method, welding condition, joint geometry, plate thickness, and weld length. Thus, it is meaningful to develop a simple method to obtain the inherent Deformation. In this report, a simple and efficient method to estimate inherent Deformation of typical weld joints is proposed. Further, using the estimated inherent Deformation, the welding Deformation of joint specimens and large plate structures are predicted.
Kenneth W. Neale - One of the best experts on this subject based on the ideXlab platform.
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Flexure and Shear Deformation of GFRP-Reinforced Shear Walls
Journal of Composites for Construction, 2014Co-Authors: Nayera Mohamed, Ahmed Sabry Farghaly, Brahim Benmokrane, Kenneth W. NealeAbstract:AbstractExperimental results of midrise RC shear walls under quasistatic cyclic loading were used to investigate the interaction of flexural and shear Deformations. Four large-scale shear walls—one reinforced with steel bars and three totally reinforced with glass fiber–reinforced polymer (GFRP) bars—were tested to failure where the behavior was dominated by flexure. It was found that relying on the diagonal displacement transducers tended to overestimate shear Deformations by 30 to 50%. To correct the shear Deformations, the center of rotation of the tested shear walls was evaluated. Based on experimental results, the fundamental equation of flexural Deformation obtained values of the center of rotation (α). Using the suggested values of α produced consistent results for the flexure and shear Deformations. Decoupling the total Deformation of the tested shear walls into flexural and shear Deformations was discussed. Using elastic materials (GFRP bars) gave uniform distributions of shear strains along the ...
