OBJECTIVES OF THE STUDY After studying this chapter you must be able to: ►Define orally and in written of engineering stress and engineering strain. ►Able to evaluate and analyze engineering stress-strain diagram and determining a) the modulus of elasticity b) the yield strength c) the tensile strength and d) estimate the percent elongation ►Calculate and solve the ductility of a metal in terms of both elongation and percent reduction of a metal that is loaded in tension to fracture. 2
OBJECTIVES OF THE STUDY (II) After studying this chapter you must be able to: ►Able to describe orally and in written of the changes in specimen profile to the point of fracture for the tensile deformation of a ductile and brittle cylinder. ►Define orally and in written of what is meant by hardness and able to differentiate it with strength of materials. ►Able to name the two most common hardness testing technique and to note differences betweenthem. 3
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