Chap 2 Mechanical Behavior

Question 1

Permanent elongation of a component under a static load maintained for a period of time

Answer 1

creep

Question 2

Maximum force (stress) to which a material can be subjected in a cycle without fail, regardless of the number of cycles

Answer 2

endurance limit

Question 3

Resistance of a material to permanent indentation

Answer 3

hardness

Question 4

Area under true stress-true strain curve; amount of energy per unit volume that the material dissipates prior to fracturing in a tension test

Answer 4

toughness

Question 5

Stress per unit strain of a test specimen that is under elastic stress in a tension test; the slope of elastic portion of stress-strain curve

Answer 5

modulus of elasticity

Question 6

In engineering stress-strain curve, necking begins at

Answer 6

tensile strength

Question 7

Force required to permanently deform a specimen in a tension test

Answer 7

yield stress

Question 8

Characterized by being easily stretchable without breaking

Answer 8

ductile

Question 9

Failure of a material that results from cyclic stresses

Answer 9

fatigue failure

Question 10

Stresses that remain within a part after it has been formed and all of the external forces are removed

Answer 10

residual stresses