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一个材料的劲度(stiffness)是指材料在瞬间受到压缩或伸长时能经受的抵抗程度,因此当外力除去后,材料将恢复原状.相反,硬度(hardness)是指材料在受到长时间的挤压或拉伸后,能保持材料的形状不发生变化的能力,因为材料形状的变化就意味着材料内部原子的位置发生了位移.单晶的固?
The stiffness of a material refers to the degree of resistance a material can withstand when it is compressed or stretched in an instant so that the material will return to its original state when the external force is removed.Roughness, on the other hand, Squeeze or stretch, to maintain the shape of the material does not change, because the change in shape of the material means that the position of atoms within the material has been displaced.