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The elastic modulus of a material is not the same as the stiffness of a component made from that material. Elastic modulus is a property of the constituent material; stiffness is a property of a structure or component of a structure, and hence it is dependent upon various physical dimensions that describe that component.
Approximate specific stiffness for various materials. No attempt is made to correct for materials whose stiffness varies with their density. Material Young's modulus Density (g/cm 3) Young's modulus per density; specific stiffness (10 6 m 2 s −2) Young's modulus per density squared (10 3 m 5 kg −1 s −2) Young's modulus per density cubed ...
English: Materials are plotted by stiffness (Young's modulus) versus density, and grouped by material type. Guidelines are provided to compare materials by stiffness versus density, stiffness versus density squared, and stiffness versus density cubed. A limited range of stiffnesses and densities is included. All materials are labeled.
Elastic constants are specific parameters that quantify the stiffness of a material in response to applied stresses and are fundamental in defining the elastic properties of materials. These constants form the elements of the stiffness matrix in tensor notation, which relates stress to strain through linear equations in anisotropic materials.
Young's modulus is the slope of the linear part of the stress–strain curve for a material under tension or compression.. Young's modulus (or Young modulus) is a mechanical property of solid materials that measures the tensile or compressive stiffness when the force is applied lengthwise.
English: Materials are plotted by stiffness (Young's modulus) versus density, and grouped by material type. Guidelines are provided to compare materials by stiffness versus density, stiffness versus density squared, and stiffness versus density cubed. The full range of stiffnesses and densities is included. Only a few materials are labeled.