learn.zybooks.com/zybook/UMASSM&I-ENG201LeeSpring2023/chapter/6/section/3

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elastic deformation; a plot of stress (ordinate) versus strain (abscissa) results in a linear relationship, as shown in Figure 6.3.1. The slope of this linear segment corresponds to the modulus of elasticity E. This modulus may be thought of as stiffness, or a material's resistance to elastic deformation. The greater the modulus, the stiffer the material, or the smaller the elastic strain that results from the application of a given stress. The modulus is an important design parameter for computing elastic deflections.

modulus of elasticity (E): The ratio of stress to strain when deformation is totally elastic; also a measure of the stiffness of a material. elastic deformation: Deformation that is nonpermanent—that is, totally recovered upon release of an applied stress.

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