The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform
Frank Madsen - One of the best experts on this subject based on the ideXlab platform.
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The effect of Specimen geometry on the mechanical behaviour of trabecular bone Specimens.
Journal of biomechanics, 1992Co-Authors: Frank Linde, Ivan Hvid, Frank MadsenAbstract:The effect of Specimen geometry on the mechanical behaviour of trabecular bone Specimens was studied by non-destructive uniaxial compression to 0.4% strain using cylindrical Specimens with different sizes and length-to-diameter ratios, and by comparing cubic and cylindrical Specimens with the same cross-sectional area. Both the length and the cross-sectional area of the Specimen had a highly significant influence on the mechanical behaviour (p less than 0.0001). Within the actual range of length (2.75-11.0 mm) the normalized stiffness (Young's modulus) was related nearly linearly to the Specimen length. This dependency on Specimen length is suggested to be caused mainly by structural disintegrity of the trabecular Specimens near the surface. The normalized stiffness (Young's modulus) was also positively correlated to the cross-sectional area. This dependency on cross-sectional area is probably due to friction-induced stress inhomogeneity at the platen-Specimen interface. A cube with side length 6.5 mm or a cylindrical Specimen with 7.5 mm diameter and 6.5 mm length are suggested as standard Specimens for comparative studies on trabecular bone mechanics.
Frank Linde - One of the best experts on this subject based on the ideXlab platform.
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The effect of Specimen geometry on the mechanical behaviour of trabecular bone Specimens.
Journal of biomechanics, 1992Co-Authors: Frank Linde, Ivan Hvid, Frank MadsenAbstract:The effect of Specimen geometry on the mechanical behaviour of trabecular bone Specimens was studied by non-destructive uniaxial compression to 0.4% strain using cylindrical Specimens with different sizes and length-to-diameter ratios, and by comparing cubic and cylindrical Specimens with the same cross-sectional area. Both the length and the cross-sectional area of the Specimen had a highly significant influence on the mechanical behaviour (p less than 0.0001). Within the actual range of length (2.75-11.0 mm) the normalized stiffness (Young's modulus) was related nearly linearly to the Specimen length. This dependency on Specimen length is suggested to be caused mainly by structural disintegrity of the trabecular Specimens near the surface. The normalized stiffness (Young's modulus) was also positively correlated to the cross-sectional area. This dependency on cross-sectional area is probably due to friction-induced stress inhomogeneity at the platen-Specimen interface. A cube with side length 6.5 mm or a cylindrical Specimen with 7.5 mm diameter and 6.5 mm length are suggested as standard Specimens for comparative studies on trabecular bone mechanics.
Lijie Qiao - One of the best experts on this subject based on the ideXlab platform.
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influence of Specimen thickness with rectangular cross section on the tensile properties of structural steels
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2012Co-Authors: W. J. Yuan, Yanjing Su, Zhiliang Zhang, Lijie QiaoAbstract:Abstract Specimens with a rectangular cross-section are commonly used to measure the tensile properties of materials. However, the Specimen size may influence the results. In this study, the tensile properties of FH550 and X80 steels were investigated using rectangular cross-section Specimens with different thicknesses and the same width. Both an experimental study and a 3D finite element method (FEM) study have been conducted. The results show that the uniform elongation is independent of Specimen size, but the post-necking elongation increases dramatically as Specimen thickness increases, which was attributed to the stress distribution near neck region. Single factor analysis results show that both the yield and the ultimate tensile strength of the Specimens are independent of the thickness when the Specimen thickness is larger than 1 mm.
Ivan Hvid - One of the best experts on this subject based on the ideXlab platform.
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The effect of Specimen geometry on the mechanical behaviour of trabecular bone Specimens.
Journal of biomechanics, 1992Co-Authors: Frank Linde, Ivan Hvid, Frank MadsenAbstract:The effect of Specimen geometry on the mechanical behaviour of trabecular bone Specimens was studied by non-destructive uniaxial compression to 0.4% strain using cylindrical Specimens with different sizes and length-to-diameter ratios, and by comparing cubic and cylindrical Specimens with the same cross-sectional area. Both the length and the cross-sectional area of the Specimen had a highly significant influence on the mechanical behaviour (p less than 0.0001). Within the actual range of length (2.75-11.0 mm) the normalized stiffness (Young's modulus) was related nearly linearly to the Specimen length. This dependency on Specimen length is suggested to be caused mainly by structural disintegrity of the trabecular Specimens near the surface. The normalized stiffness (Young's modulus) was also positively correlated to the cross-sectional area. This dependency on cross-sectional area is probably due to friction-induced stress inhomogeneity at the platen-Specimen interface. A cube with side length 6.5 mm or a cylindrical Specimen with 7.5 mm diameter and 6.5 mm length are suggested as standard Specimens for comparative studies on trabecular bone mechanics.
S. Dionne - One of the best experts on this subject based on the ideXlab platform.
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recent advances in fib tem Specimen preparation techniques
Materials Characterization, 2006Co-Authors: T. Malis, S. DionneAbstract:Preparing high-quality transmission electron microscopy (TEM) Specimens is of paramount importance in TEM studies. The development of the focused ion beam (FIB) microscope has greatly enhanced TEM Specimen preparation capabilities. In recent years, various FIB-TEM foil preparation techniques have been developed. However, the currently available techniques fail to produce TEM Specimens from fragile and ultra-fine Specimens such as fine fibers. In this paper, the conventional FIB-TEM Specimen preparation techniques are reviewed, and their advantages and shortcomings are compared. In addition, a new technique suitable to prepare TEM samples from ultra-fine Specimens is demonstrated.
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Recent advances in FIB–TEM Specimen preparation techniques
Materials Characterization, 2006Co-Authors: T. Malis, S. DionneAbstract:Preparing high-quality transmission electron microscopy (TEM) Specimens is of paramount importance in TEM studies. The development of the focused ion beam (FIB) microscope has greatly enhanced TEM Specimen preparation capabilities. In recent years, various FIB-TEM foil preparation techniques have been developed. However, the currently available techniques fail to produce TEM Specimens from fragile and ultra-fine Specimens such as fine fibers. In this paper, the conventional FIB-TEM Specimen preparation techniques are reviewed, and their advantages and shortcomings are compared. In addition, a new technique suitable to prepare TEM samples from ultra-fine Specimens is demonstrated.
