CHAPTER 1 Introduction to fictile tasteing TENSILE TESTS atomic number 18 performed for several reasons. The results of malleable tests are used in selecting cloths for plan applications. ductile properties oft are include in natural speci?cations to ensure quality. Tensile properties ofttimes are mensural during education of new materials and processes, so that different materials and processes offer be compared. Finally, tractile properties often are used to predict the behavior of a material beneath forms of loading early(a) than uniaxial tension. The strength of a material often is the primary concern. The strength of interest may be whole toned in terms of either the puree necessary to case appreciable tractile deformation or the maximum stress that the material loafer withstand. These measures of strength are used, with appropriate reprove (in the form of safety factors), in design design. Also of interest is the materials ductileness, which is a measure of how much it can be deformed before it fractures. seldom is ductility interconnected directly in design; rather, it is included in material speci?cations to ensure quality and toughness. Low ductility in a tensile test often is accompanied by outset resistance to fracture under other forms of loading.
Elastic properties as well may be of interest, provided special techniques must be used to measure these properties during tensile testing, and more accurate measurements can be made by ultrasonic techniques. This chapter provides a outline overview of some of the more primal topics associated with tensile testing. These include: ? ? Tensile specimens and test machines Str ess-strain curves, including discussions of ! elastic versus plastic deformation, yield points, and ductility ? confessedly stress and strain ? Test methodology and data compendium It should be noted that succeeding chapters contain more little information on these topics. virtually notably, the following chapters should be referred to: ? Chapter 2, Mechanical...If you postulate to get a honorable essay, order it on our website: OrderEssay.net
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