The Experts below are selected from a list of 40827 Experts worldwide ranked by ideXlab platform
L E Murr - One of the best experts on this subject based on the ideXlab platform.
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influence of cell shape on mechanical properties of ti 6al 4v meshes fabricated by electron beam melting method
Acta Biomaterialia, 2014Co-Authors: Zigui Wang, Y. L. Hao, W. T. Hou, R Yang, L E MurrAbstract:Ti-6Al-4V reticulated meshes with different elements (cubic, G7 and rhombic dodecahedron) in Materialise software were fabricated by additive manufacturing using the electron beam melting (EBM) method, and the effects of cell shape on the mechanical properties of these samples were studied. The results showed that these cellular structures with porosities of 88-58% had compressive strength and elastic modulus in the range 10-300MPa and 0.5-15GPa, respectively. The compressive strength and Deformation behavior of these meshes were determined by the coupling of the buckling and Bending Deformation of struts. Meshes that were dominated by buckling Deformation showed relatively high collapse strength and were prone to exhibit brittle characteristics in their stress-strain curves. For meshes dominated by Bending Deformation, the elastic Deformation corresponded well to the Gibson-Ashby model. By enhancing the effect of Bending Deformation, the stress-strain curve characteristics can change from brittle to ductile (the smooth plateau area). Therefore, Ti-6Al-4V cellular solids with high strength, low modulus and desirable Deformation behavior could be fabricated through the cell shape design using the EBM technique.
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influence of cell shape on mechanical properties of ti 6al 4v meshes fabricated by electron beam melting method
Acta Biomaterialia, 2014Co-Authors: S. J. Li, Y. L. Hao, W. T. Hou, R Yang, Zigui Wang, Qiang Xu, L E MurrAbstract:Abstract Ti–6Al–4V reticulated meshes with different elements (cubic, G7 and rhombic dodecahedron) in Materialise software were fabricated by additive manufacturing using the electron beam melting (EBM) method, and the effects of cell shape on the mechanical properties of these samples were studied. The results showed that these cellular structures with porosities of 88–58% had compressive strength and elastic modulus in the range 10–300 MPa and 0.5–15 GPa, respectively. The compressive strength and Deformation behavior of these meshes were determined by the coupling of the buckling and Bending Deformation of struts. Meshes that were dominated by buckling Deformation showed relatively high collapse strength and were prone to exhibit brittle characteristics in their stress–strain curves. For meshes dominated by Bending Deformation, the elastic Deformation corresponded well to the Gibson–Ashby model. By enhancing the effect of Bending Deformation, the stress–strain curve characteristics can change from brittle to ductile (the smooth plateau area). Therefore, Ti–6Al–4V cellular solids with high strength, low modulus and desirable Deformation behavior could be fabricated through the cell shape design using the EBM technique.
R Yang - One of the best experts on this subject based on the ideXlab platform.
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The influence of cell morphology on the compressive fatigue behavior of Ti-6Al-4V meshes fabricated by electron beam melting
Journal of the Mechanical Behavior of Biomedical Materials, 2016Co-Authors: S. Zhao, Y. L. Hao, W. T. Hou, S. J. Li, R Yang, R D K MisraAbstract:Additive manufacturing technique is a promising approach for fabricating cellular bone substitutes such as trabecular and cortical bones because of the ability to adjust process parameters to fabricate different shapes and inner structures. Considering the long term safe application in human body, the metallic cellular implants are expected to exhibit superior fatigue property. The objective of the study was to study the influence of cell shape on the compressive fatigue behavior of Ti-6Al-4V mesh arrays fabricated by electron beam melting. The results indicated that the underlying fatigue mechanism for the three kinds of meshes (cubic, G7 and rhombic dodecahedron) is the interaction of cyclic ratcheting and fatigue crack growth on the struts, which is closely related to cumulative effect of buckling and Bending Deformation of the strut. By increasing the buckling Deformation on the struts through cell shape design, the cyclic ratcheting rate of the meshes during cyclic Deformation was decreased and accordingly, the compressive fatigue strength was increased. With increasing Bending Deformation of struts, fatigue crack growth in struts contributed more to the fatigue damage of meshes. Rough surface and pores contained in the struts significantly deteriorated the compressive fatigue strength of the struts. By optimizing the buckling and Bending Deformation through cell shape design, Ti-6Al-4V alloy cellular solids with high fatigue strength and low modulus can be fabricated by the EBM technique.
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influence of cell shape on mechanical properties of ti 6al 4v meshes fabricated by electron beam melting method
Acta Biomaterialia, 2014Co-Authors: Zigui Wang, Y. L. Hao, W. T. Hou, R Yang, L E MurrAbstract:Ti-6Al-4V reticulated meshes with different elements (cubic, G7 and rhombic dodecahedron) in Materialise software were fabricated by additive manufacturing using the electron beam melting (EBM) method, and the effects of cell shape on the mechanical properties of these samples were studied. The results showed that these cellular structures with porosities of 88-58% had compressive strength and elastic modulus in the range 10-300MPa and 0.5-15GPa, respectively. The compressive strength and Deformation behavior of these meshes were determined by the coupling of the buckling and Bending Deformation of struts. Meshes that were dominated by buckling Deformation showed relatively high collapse strength and were prone to exhibit brittle characteristics in their stress-strain curves. For meshes dominated by Bending Deformation, the elastic Deformation corresponded well to the Gibson-Ashby model. By enhancing the effect of Bending Deformation, the stress-strain curve characteristics can change from brittle to ductile (the smooth plateau area). Therefore, Ti-6Al-4V cellular solids with high strength, low modulus and desirable Deformation behavior could be fabricated through the cell shape design using the EBM technique.
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influence of cell shape on mechanical properties of ti 6al 4v meshes fabricated by electron beam melting method
Acta Biomaterialia, 2014Co-Authors: S. J. Li, Y. L. Hao, W. T. Hou, R Yang, Zigui Wang, Qiang Xu, L E MurrAbstract:Abstract Ti–6Al–4V reticulated meshes with different elements (cubic, G7 and rhombic dodecahedron) in Materialise software were fabricated by additive manufacturing using the electron beam melting (EBM) method, and the effects of cell shape on the mechanical properties of these samples were studied. The results showed that these cellular structures with porosities of 88–58% had compressive strength and elastic modulus in the range 10–300 MPa and 0.5–15 GPa, respectively. The compressive strength and Deformation behavior of these meshes were determined by the coupling of the buckling and Bending Deformation of struts. Meshes that were dominated by buckling Deformation showed relatively high collapse strength and were prone to exhibit brittle characteristics in their stress–strain curves. For meshes dominated by Bending Deformation, the elastic Deformation corresponded well to the Gibson–Ashby model. By enhancing the effect of Bending Deformation, the stress–strain curve characteristics can change from brittle to ductile (the smooth plateau area). Therefore, Ti–6Al–4V cellular solids with high strength, low modulus and desirable Deformation behavior could be fabricated through the cell shape design using the EBM technique.
Y. L. Hao - One of the best experts on this subject based on the ideXlab platform.
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The influence of cell morphology on the compressive fatigue behavior of Ti-6Al-4V meshes fabricated by electron beam melting
Journal of the Mechanical Behavior of Biomedical Materials, 2016Co-Authors: S. Zhao, Y. L. Hao, W. T. Hou, S. J. Li, R Yang, R D K MisraAbstract:Additive manufacturing technique is a promising approach for fabricating cellular bone substitutes such as trabecular and cortical bones because of the ability to adjust process parameters to fabricate different shapes and inner structures. Considering the long term safe application in human body, the metallic cellular implants are expected to exhibit superior fatigue property. The objective of the study was to study the influence of cell shape on the compressive fatigue behavior of Ti-6Al-4V mesh arrays fabricated by electron beam melting. The results indicated that the underlying fatigue mechanism for the three kinds of meshes (cubic, G7 and rhombic dodecahedron) is the interaction of cyclic ratcheting and fatigue crack growth on the struts, which is closely related to cumulative effect of buckling and Bending Deformation of the strut. By increasing the buckling Deformation on the struts through cell shape design, the cyclic ratcheting rate of the meshes during cyclic Deformation was decreased and accordingly, the compressive fatigue strength was increased. With increasing Bending Deformation of struts, fatigue crack growth in struts contributed more to the fatigue damage of meshes. Rough surface and pores contained in the struts significantly deteriorated the compressive fatigue strength of the struts. By optimizing the buckling and Bending Deformation through cell shape design, Ti-6Al-4V alloy cellular solids with high fatigue strength and low modulus can be fabricated by the EBM technique.
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influence of cell shape on mechanical properties of ti 6al 4v meshes fabricated by electron beam melting method
Acta Biomaterialia, 2014Co-Authors: Zigui Wang, Y. L. Hao, W. T. Hou, R Yang, L E MurrAbstract:Ti-6Al-4V reticulated meshes with different elements (cubic, G7 and rhombic dodecahedron) in Materialise software were fabricated by additive manufacturing using the electron beam melting (EBM) method, and the effects of cell shape on the mechanical properties of these samples were studied. The results showed that these cellular structures with porosities of 88-58% had compressive strength and elastic modulus in the range 10-300MPa and 0.5-15GPa, respectively. The compressive strength and Deformation behavior of these meshes were determined by the coupling of the buckling and Bending Deformation of struts. Meshes that were dominated by buckling Deformation showed relatively high collapse strength and were prone to exhibit brittle characteristics in their stress-strain curves. For meshes dominated by Bending Deformation, the elastic Deformation corresponded well to the Gibson-Ashby model. By enhancing the effect of Bending Deformation, the stress-strain curve characteristics can change from brittle to ductile (the smooth plateau area). Therefore, Ti-6Al-4V cellular solids with high strength, low modulus and desirable Deformation behavior could be fabricated through the cell shape design using the EBM technique.
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influence of cell shape on mechanical properties of ti 6al 4v meshes fabricated by electron beam melting method
Acta Biomaterialia, 2014Co-Authors: S. J. Li, Y. L. Hao, W. T. Hou, R Yang, Zigui Wang, Qiang Xu, L E MurrAbstract:Abstract Ti–6Al–4V reticulated meshes with different elements (cubic, G7 and rhombic dodecahedron) in Materialise software were fabricated by additive manufacturing using the electron beam melting (EBM) method, and the effects of cell shape on the mechanical properties of these samples were studied. The results showed that these cellular structures with porosities of 88–58% had compressive strength and elastic modulus in the range 10–300 MPa and 0.5–15 GPa, respectively. The compressive strength and Deformation behavior of these meshes were determined by the coupling of the buckling and Bending Deformation of struts. Meshes that were dominated by buckling Deformation showed relatively high collapse strength and were prone to exhibit brittle characteristics in their stress–strain curves. For meshes dominated by Bending Deformation, the elastic Deformation corresponded well to the Gibson–Ashby model. By enhancing the effect of Bending Deformation, the stress–strain curve characteristics can change from brittle to ductile (the smooth plateau area). Therefore, Ti–6Al–4V cellular solids with high strength, low modulus and desirable Deformation behavior could be fabricated through the cell shape design using the EBM technique.
W. T. Hou - One of the best experts on this subject based on the ideXlab platform.
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The influence of cell morphology on the compressive fatigue behavior of Ti-6Al-4V meshes fabricated by electron beam melting
Journal of the Mechanical Behavior of Biomedical Materials, 2016Co-Authors: S. Zhao, Y. L. Hao, W. T. Hou, S. J. Li, R Yang, R D K MisraAbstract:Additive manufacturing technique is a promising approach for fabricating cellular bone substitutes such as trabecular and cortical bones because of the ability to adjust process parameters to fabricate different shapes and inner structures. Considering the long term safe application in human body, the metallic cellular implants are expected to exhibit superior fatigue property. The objective of the study was to study the influence of cell shape on the compressive fatigue behavior of Ti-6Al-4V mesh arrays fabricated by electron beam melting. The results indicated that the underlying fatigue mechanism for the three kinds of meshes (cubic, G7 and rhombic dodecahedron) is the interaction of cyclic ratcheting and fatigue crack growth on the struts, which is closely related to cumulative effect of buckling and Bending Deformation of the strut. By increasing the buckling Deformation on the struts through cell shape design, the cyclic ratcheting rate of the meshes during cyclic Deformation was decreased and accordingly, the compressive fatigue strength was increased. With increasing Bending Deformation of struts, fatigue crack growth in struts contributed more to the fatigue damage of meshes. Rough surface and pores contained in the struts significantly deteriorated the compressive fatigue strength of the struts. By optimizing the buckling and Bending Deformation through cell shape design, Ti-6Al-4V alloy cellular solids with high fatigue strength and low modulus can be fabricated by the EBM technique.
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influence of cell shape on mechanical properties of ti 6al 4v meshes fabricated by electron beam melting method
Acta Biomaterialia, 2014Co-Authors: Zigui Wang, Y. L. Hao, W. T. Hou, R Yang, L E MurrAbstract:Ti-6Al-4V reticulated meshes with different elements (cubic, G7 and rhombic dodecahedron) in Materialise software were fabricated by additive manufacturing using the electron beam melting (EBM) method, and the effects of cell shape on the mechanical properties of these samples were studied. The results showed that these cellular structures with porosities of 88-58% had compressive strength and elastic modulus in the range 10-300MPa and 0.5-15GPa, respectively. The compressive strength and Deformation behavior of these meshes were determined by the coupling of the buckling and Bending Deformation of struts. Meshes that were dominated by buckling Deformation showed relatively high collapse strength and were prone to exhibit brittle characteristics in their stress-strain curves. For meshes dominated by Bending Deformation, the elastic Deformation corresponded well to the Gibson-Ashby model. By enhancing the effect of Bending Deformation, the stress-strain curve characteristics can change from brittle to ductile (the smooth plateau area). Therefore, Ti-6Al-4V cellular solids with high strength, low modulus and desirable Deformation behavior could be fabricated through the cell shape design using the EBM technique.
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influence of cell shape on mechanical properties of ti 6al 4v meshes fabricated by electron beam melting method
Acta Biomaterialia, 2014Co-Authors: S. J. Li, Y. L. Hao, W. T. Hou, R Yang, Zigui Wang, Qiang Xu, L E MurrAbstract:Abstract Ti–6Al–4V reticulated meshes with different elements (cubic, G7 and rhombic dodecahedron) in Materialise software were fabricated by additive manufacturing using the electron beam melting (EBM) method, and the effects of cell shape on the mechanical properties of these samples were studied. The results showed that these cellular structures with porosities of 88–58% had compressive strength and elastic modulus in the range 10–300 MPa and 0.5–15 GPa, respectively. The compressive strength and Deformation behavior of these meshes were determined by the coupling of the buckling and Bending Deformation of struts. Meshes that were dominated by buckling Deformation showed relatively high collapse strength and were prone to exhibit brittle characteristics in their stress–strain curves. For meshes dominated by Bending Deformation, the elastic Deformation corresponded well to the Gibson–Ashby model. By enhancing the effect of Bending Deformation, the stress–strain curve characteristics can change from brittle to ductile (the smooth plateau area). Therefore, Ti–6Al–4V cellular solids with high strength, low modulus and desirable Deformation behavior could be fabricated through the cell shape design using the EBM technique.
Yoshio Bando - One of the best experts on this subject based on the ideXlab platform.
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kinking effects and transport properties of coaxial bn c nanotubes as revealed by in situ transmission electron microscopy and theoretical analysis
APL Materials, 2019Co-Authors: Xin Zhou, Dmitry G Kvashnin, Yanming Xue, Daiming Tang, Ovidiu Cretu, Masanori Mitome, Yoshio BandoAbstract:The insights into transport behavior and the effects of Bending on heterostructures constructed from boron nitride (BN) and carbon (C) nanotubes are important for their flexible device applications because the two systems have equally excellent mechanical but completely different electrical properties. In this work, coaxial BN–C nanotubes have been fabricated and their intrinsic transport properties, as well as structural and electrical response to Bending Deformation, are studied inside a high-resolution transmission electron microscope. Ballistic, diffusive, and hopping transports within different tube length ranges have been observed. When Bending Deformation was applied to the tubes, although severe kinking becomes apparent, their transport properties are not notably affected. Meanwhile, both theoretical and experimental analyses confirm that the kink positions depend on the ratio of tube diameter to its length. Possible formation of quantum dots, directly within the kink areas, was predicted through calculations of electron density redistribution between nanotube walls at Bending.The insights into transport behavior and the effects of Bending on heterostructures constructed from boron nitride (BN) and carbon (C) nanotubes are important for their flexible device applications because the two systems have equally excellent mechanical but completely different electrical properties. In this work, coaxial BN–C nanotubes have been fabricated and their intrinsic transport properties, as well as structural and electrical response to Bending Deformation, are studied inside a high-resolution transmission electron microscope. Ballistic, diffusive, and hopping transports within different tube length ranges have been observed. When Bending Deformation was applied to the tubes, although severe kinking becomes apparent, their transport properties are not notably affected. Meanwhile, both theoretical and experimental analyses confirm that the kink positions depend on the ratio of tube diameter to its length. Possible formation of quantum dots, directly within the kink areas, was predicted through ...