The Experts below are selected from a list of 10554 Experts worldwide ranked by ideXlab platform
Qinghua Qin - One of the best experts on this subject based on the ideXlab platform.
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thermoelectroelastic solutions for surface bone remodeling under axial and Transverse Loads
Biomaterials, 2005Co-Authors: Qinghua QinAbstract:Theoretical prediction of surface bone remodeling in the diaphysis of the long bone under various external Loads are made within the framework of adaptive elastic theory. These Loads include external lateral pressure, electric and thermal Loads. Two solutions are presented for analyzing thermoelectroelastic problems of surface bone remodeling. The analytical solution that gives explicit formulation is capable of modeling homogeneous bone materials, while the semi-analytical solution is suitable for analyzing inhomogeneous cases. Numerical results are presented to verify the proposed formulation and to show the effects of mechanical, thermal and electric Loads on surface bone remodeling process.
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thermoelectroelastic solutions for internal bone remodeling under axial and Transverse Loads
International Journal of Solids and Structures, 2004Co-Authors: Qinghua QinAbstract:Internal bone remodeling of inhomogeneous materials is studied both theoretically and numerically in this paper. Two solutions are presented for analyzing thermoelectroelastic problems of internal bone remodeling subjected to coupled axial force, external lateral pressure, electric and thermal Loads. Though all bone is heterogeneous, assumption of homogeneity is made to entail a smoothing over features such as osteons, lamellae, fibers, and other structural elements, so that a continuum representation can be obtained. A semi-analytical solution is also presented for analyzing inhomogeneous cases. Numerical results are presented to verify the proposed formulation and to show the effects of mechanical, thermal and electric Loads on bone remodeling process.
Huishen Shen - One of the best experts on this subject based on the ideXlab platform.
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nonlocal plate model for nonlinear bending of bilayer graphene sheets subjected to Transverse Loads in thermal environments
Composite Structures, 2013Co-Authors: Huishen Shen, Chenli ZhangAbstract:This paper investigates the nonlinear bending behavior of a single-layer rectangular graphene sheet subjected to a Transverse uniform load in thermal environments. The single-layer graphene sheet (SLGS) is modeled as a nonlocal orthotropic plate which contains small scale effect. Geometric nonlinearity in the von Karman sense is adopted. The thermal effects are included and the material properties are assumed to be size dependent and temperature dependent, and are obtained from molecular dynamics (MD) simulations. The small scale parameter e 0 a is estimated by matching the deflections of graphene sheets observed from the MD simulation results with the numerical results obtained from the nonlocal plate model. The numerical results show that the temperature change as well as the aspect ratio has a significant effect on the nonlinear bending behavior of SLGSs. The results reveal that the small scale parameter reduces the static large deflections of SLGSs, and the small scale effect also plays an important role in the nonlinear bending of SLGSs.
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nonlocal plate model for nonlinear bending of single layer graphene sheets subjected to Transverse Loads in thermal environments
Applied Physics A, 2011Co-Authors: Huishen Shen, Le Shen, Chenli ZhangAbstract:This paper investigates the nonlinear bending behavior of a single-layer rectangular graphene sheet subjected to a Transverse uniform load in thermal environments. The single-layer graphene sheet (SLGS) is modeled as a nonlocal orthotropic plate which contains small scale effect. Geometric nonlinearity in the von Karman sense is adopted. The thermal effects are included and the material properties are assumed to be size dependent and temperature dependent, and are obtained from molecular dynamics (MD) simulations. The small scale parameter e 0 a is estimated by matching the deflections of graphene sheets observed from the MD simulation results with the numerical results obtained from the nonlocal plate model. The numerical results show that the temperature change as well as the aspect ratio has a significant effect on the nonlinear bending behavior of SLGSs. The results reveal that the small scale parameter reduces the static large deflections of SLGSs, and the small scale effect also plays an important role in the nonlinear bending of SLGSs.
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nonlinear bending response of functionally graded plates subjected to Transverse Loads and in thermal environments
International Journal of Mechanical Sciences, 2002Co-Authors: Huishen ShenAbstract:Nonlinear bending analysis is presented for a simply supported, functionally graded rectangular plate subjected to a Transverse uniform or sinusoidal load and in thermal environments. Material properties are assumed to be temperature-dependent, and graded in the thickness direction according to a simple power-law distribution in terms of the volume fractions of the constituents. The governing equations of a functionally graded plate are based on Reddy's higher-order shear deformation plate theory that includes thermal effects. Two cases of the in-plane boundary conditions are considered. A mixed Galerkin-perturbation technique is employed to determine the load-deflection and load-bending moment curves. The numerical illustrations concern nonlinear bending response of functional graded rectangular plates with two constituent materials. The influences played by temperature rise, the character of in-plane boundary conditions, Transverse shear deformation, plate aspect ratio and volume fraction distributions are studied.
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postbuckling of free edge reissner mindlin plates elastically supported on a two parameter foundation and subjected to biaxial compression and Transverse Loads
Engineering Structures, 2001Co-Authors: Huishen ShenAbstract:Abstract A postbuckling analysis is presented for a rectangular Reissner–Mindlin plate with all four free edges subjected to biaxial compression combined with a Transverse central patch load and resting on a two-parameter (Pasternak-type) elastic foundation. The lateral pressure is first converted into an initial deflection and the initial geometric imperfection of the plate is also taken into account. The formulations are based on Reissner–Mindlin plate theory considering the first order shear deformation effect, including plate-foundation interaction. The analysis uses a mixed Galerkin-perturbation technique to determine the buckling Loads and postbuckling equilibrium paths. Numerical examples are presented that relate to the performances of perfect and imperfect, moderately thick plates with all four free edges under combined loading conditions and resting on two-parameter elastic foundations from which results for Winkler elastic foundations are obtained as a limiting case. The effects played by foundation stiffness, Transverse shear deformation, plate aspect ratio, loaded area parameter and initial lateral pressure are studied. Typical results are presented in dimensionless graphical form.
Jean-luc Bozet - One of the best experts on this subject based on the ideXlab platform.
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New computational method of the ball/race contacts Transverse Loads of high speed ball bearings without race control hypothesis
Tribology International, 2017Co-Authors: Christophe Servais, Jean-luc BozetAbstract:Abstract Some hypotheses are still necessary in order to access the ball bearing Newtonian equilibrium with quasi-static methods. Among these hypotheses are the values of the Transverse Loads within ball/race contacts. Those Loads are due to the gyroscopic torques. Nowadays, the Transverse Loads are estimated without any equilibrium criterion by the specialized literature. Moreover, the race control assumption is often employed in addition to the hypotheses made about the Transverse Loads. The paper describes a new method to compute the Transverse Loads without using the race control assumption. Then, a correlation between the ball bearing kinematics and the Transverse Loads is established. It leads to an accurate and efficient computational method to access the Newtonian equilibrium of high speed ball bearings.
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new computational method of the ball race contacts Transverse Loads of high speed ball bearings without race control hypothesis
Tribology International, 2017Co-Authors: Christophe Servais, Jean-luc BozetAbstract:Abstract Some hypotheses are still necessary in order to access the ball bearing Newtonian equilibrium with quasi-static methods. Among these hypotheses are the values of the Transverse Loads within ball/race contacts. Those Loads are due to the gyroscopic torques. Nowadays, the Transverse Loads are estimated without any equilibrium criterion by the specialized literature. Moreover, the race control assumption is often employed in addition to the hypotheses made about the Transverse Loads. The paper describes a new method to compute the Transverse Loads without using the race control assumption. Then, a correlation between the ball bearing kinematics and the Transverse Loads is established. It leads to an accurate and efficient computational method to access the Newtonian equilibrium of high speed ball bearings.
Christophe Servais - One of the best experts on this subject based on the ideXlab platform.
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New computational method of the ball/race contacts Transverse Loads of high speed ball bearings without race control hypothesis
Tribology International, 2017Co-Authors: Christophe Servais, Jean-luc BozetAbstract:Abstract Some hypotheses are still necessary in order to access the ball bearing Newtonian equilibrium with quasi-static methods. Among these hypotheses are the values of the Transverse Loads within ball/race contacts. Those Loads are due to the gyroscopic torques. Nowadays, the Transverse Loads are estimated without any equilibrium criterion by the specialized literature. Moreover, the race control assumption is often employed in addition to the hypotheses made about the Transverse Loads. The paper describes a new method to compute the Transverse Loads without using the race control assumption. Then, a correlation between the ball bearing kinematics and the Transverse Loads is established. It leads to an accurate and efficient computational method to access the Newtonian equilibrium of high speed ball bearings.
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new computational method of the ball race contacts Transverse Loads of high speed ball bearings without race control hypothesis
Tribology International, 2017Co-Authors: Christophe Servais, Jean-luc BozetAbstract:Abstract Some hypotheses are still necessary in order to access the ball bearing Newtonian equilibrium with quasi-static methods. Among these hypotheses are the values of the Transverse Loads within ball/race contacts. Those Loads are due to the gyroscopic torques. Nowadays, the Transverse Loads are estimated without any equilibrium criterion by the specialized literature. Moreover, the race control assumption is often employed in addition to the hypotheses made about the Transverse Loads. The paper describes a new method to compute the Transverse Loads without using the race control assumption. Then, a correlation between the ball bearing kinematics and the Transverse Loads is established. It leads to an accurate and efficient computational method to access the Newtonian equilibrium of high speed ball bearings.
Chenli Zhang - One of the best experts on this subject based on the ideXlab platform.
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nonlocal plate model for nonlinear bending of bilayer graphene sheets subjected to Transverse Loads in thermal environments
Composite Structures, 2013Co-Authors: Huishen Shen, Chenli ZhangAbstract:This paper investigates the nonlinear bending behavior of a single-layer rectangular graphene sheet subjected to a Transverse uniform load in thermal environments. The single-layer graphene sheet (SLGS) is modeled as a nonlocal orthotropic plate which contains small scale effect. Geometric nonlinearity in the von Karman sense is adopted. The thermal effects are included and the material properties are assumed to be size dependent and temperature dependent, and are obtained from molecular dynamics (MD) simulations. The small scale parameter e 0 a is estimated by matching the deflections of graphene sheets observed from the MD simulation results with the numerical results obtained from the nonlocal plate model. The numerical results show that the temperature change as well as the aspect ratio has a significant effect on the nonlinear bending behavior of SLGSs. The results reveal that the small scale parameter reduces the static large deflections of SLGSs, and the small scale effect also plays an important role in the nonlinear bending of SLGSs.
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nonlocal plate model for nonlinear bending of single layer graphene sheets subjected to Transverse Loads in thermal environments
Applied Physics A, 2011Co-Authors: Huishen Shen, Le Shen, Chenli ZhangAbstract:This paper investigates the nonlinear bending behavior of a single-layer rectangular graphene sheet subjected to a Transverse uniform load in thermal environments. The single-layer graphene sheet (SLGS) is modeled as a nonlocal orthotropic plate which contains small scale effect. Geometric nonlinearity in the von Karman sense is adopted. The thermal effects are included and the material properties are assumed to be size dependent and temperature dependent, and are obtained from molecular dynamics (MD) simulations. The small scale parameter e 0 a is estimated by matching the deflections of graphene sheets observed from the MD simulation results with the numerical results obtained from the nonlocal plate model. The numerical results show that the temperature change as well as the aspect ratio has a significant effect on the nonlinear bending behavior of SLGSs. The results reveal that the small scale parameter reduces the static large deflections of SLGSs, and the small scale effect also plays an important role in the nonlinear bending of SLGSs.
