STRESSDOE-HDBK-1017/1-93Properties of MetalsHowever, in mechanical design, the response of components to the two conditions can be sodifferent that it is better, and safer, to regard them as separate types.As illustrated in Figure 1, the plane of a tensile or compressive stress lies perpendicular to theaxis of operation of the force from which it originates. The plane of a shear stress lies in theplane of the force system from which it originates. It is essential to keep these differencesquite clear both in mind and mode of expression.Figure 1 Types of Applied StressTensile stressis that type of stress in which the two sections of material on either sideof a stress plane tend to pull apart or elongate as illustrated in Figure 1(a).Compressive stressis the reverse of tensile stress. Adjacent parts of the material tendto press against each other through a typical stress plane as illustrated in Figure 1(b).Shear stressexists when two parts of a material tend to slide across each other in anytypical plane of shear upon application of force parallel to that plane as illustrated inFigure 1(c).MS-02Page 4Rev. 0
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