Although stiffness and strength are two essential mechanical properties of materials, they refer to distinct aspects of a substance’s behaviour.
The stiffness of a material is its resistance to deformation under an applied load. It is a measurement of how much a material will deflect or deform under a load, and it is frequently expressed as Young’s modulus or modulus of elasticity. Under the same strain, a more rigid material will deflect less than a less rigid material.
In contrast, strength refers to a material’s resistance to failure under an applied load. It is a measurement of the amount of stress a material can withstand before breaking, and it is frequently expressed as the yield strength or ultimate tensile strength. A material with greater tensile strength will be able to withstand greater tension or load before it fails.
Stiffness and strength are both essential mechanical properties of materials, but they refer to distinct aspects of a material’s behaviour. Stiffness is a measurement of a material’s resistance to deformation, whereas strength is a measurement of a material’s resistance to failure under an applied load.
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