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Design Properties of Materials
Published in Robert L. Mott, Joseph A. Untener, Applied Strength of Materials, Sixth Edition SI Units Version, 2017
Robert L. Mott, Joseph A. Untener
Designers typically seek to produce products that are safe, strong, stiff, lightweight, and highly tolerant of the environment in which the product will operate. Composites often excel in meeting these objectives when compared to alternative materials such as metals, wood, and unfilled plastics. Two parameters that are used to compare materials are specific strength and specific modulus, defined as Specific strength is the ratio of the tensile strength of a material to its specific weight.Specific modulus is the ratio of the modulus of elasticity of a material to its specific weight.Because the modulus of elasticity is a measure of the stiffness of a material, the specific modulus is sometimes called specific stiffness.
Design Properties of Materials
Published in Robert L. Mott, Joseph A. Untener, Applied Strength of Materials, 2016
Robert L. Mott, Joseph A. Untener
Designers typically seek to produce products that are safe, strong, stiff, lightweight, and highly tolerant of the environment in which the product will operate. Composites often excel in meeting these objectives when compared to alternative materials such as metals, wood, and unfilled plastics. Two parameters that are used to compare materials are specific strength and specific modulus, defined as Specific strength is the ratio of the tensile strength of a material to its specific weight.Specific modulus is the ratio of the modulus of elasticity of a material to its specific weight.
Non-linear buckling analysis of MWCNT reinforced hybrid composite shell subjected to hydrostatic pressure: A numerical and experimental investigation
Published in Mechanics of Advanced Materials and Structures, 2023
Surekha GnanaSekar, Vasudevan Rajamohan
The high specific strength and specific modulus of composite materials make them ideal for use in a wide range of applications including automotive and aerospace industries, defence, and underwater exploration sectors [1–3]. Furthermore, industries which require structures having high strength with reduced weight focus on composite materials due to their high specific strength-to-weight ratio and stiffness-to-weight ratio. Buckling is the catastrophic failure that generally occurs in thin shell structures due to the application of compressive load. Buckling analysis is generally used to estimate the critical buckling (bifurcation) load of structures and bifurcation points on the load-deflection path. The lateral deflection caused by buckling is unstable and addition of further load may result in unpredictable deformation which may lead to collapse of entire structure. To overcome this, design and analysis of the buckling of structures are very important. Bisagni [4] investigated the buckling and post-buckling response of a composite cylindrical shell under axial compressive load numerically and experimentally. The numerical analysis was carried out using the commercially available software ABAQUS® to perform the Non-linear Riks analysis, eigenvalue analysis and dynamic analysis for the composite cylinder. Huang and Zeng [5] investigated numerically and experimentally the strength and stability of a composite dome subjected to the combinations of axial compression, tension and internal pressure to identify the stress distribution throughout the structure used in a missile of the submarine. Ragavan et al. [6] examined the non-linear stability of pre-buckled or prestressed dome with ring stiffener subjected to uniform load and point load to analyze the influence of external stiffeners in the configuration of rings. The results demonstrated that the stiffening system increases the strength-to-weight ratio of the structure and enhances the overall stability of the dome.