Strength Of Materials

Question 1

it deals with analyzing stresses and deflections in materials under load.

Answer 1

Strength of materials

Question 2

is defined as the internal force which is resisting the external force per unit area.

Answer 2

Stress

Question 3

Is a stress that occurs when a member is load by an axial force

Answer 3

Axial or Normal stress

Question 4

is a force that causes layers or parts to slide upon each other in opposite drections.

Answer 4

Shearing stress

Question 5

is load applied in one plane that would result in the fastener being cut into two pieces.

Answer 5

Single shear

Question 6

is load applied in one plane that would result in the fastener being cut into three pieces.

Answer 6

Double shear

Question 7

is a failure mechanism in strurtural members like slabs and foundation by shear under the action of concentrated loads.

Answer 7

Punching shear

Question 8

the endpoint of the stress-strain curve that is a straight line.

Answer 8

Proportional limit

Question 9

the stress is directly proportional to strain.

Answer 9

Hooke’s law

Question 10

is the limit beyond which the material will no longer go back to its original shape when the load is removed, or it is the maximum stress that may be developed such that there is no permanent or residual deformation when the load is entirely
removed.

Answer 10

Elastic limit

Question 11

Is the point at which the material will have an appreciable elongation or yielding without any increase in load.

Answer 11

Yield point

Question 12

The maximum ordinate in the stress-strain
diagram.

Answer 12

Ultimate stress

Question 13

is the strength of the material at rupture. This is also known as the breaking strength.

Answer 13

Rupture point

Question 14

is the work done on a unit volume of material as the force is gradually increased from the linear range, in N·m/m3. This may be calculated as the area under the stress-strain curve from the origin O to up to the elastic limit E (the shaded area in the
figure). The resilience of the material is its ability to absorb energy without creating a permanent distortion.

Answer 14

modulus of resilience

Question 15

is the work done on a unit volume of material as the force is gradually increased from O to R, in N·m/m3. This may be calculated as the area under the entire stress-strain curve (from O to R). The
toughness of a material is its ability to absorb The ratio of the sidewise deformation (or strain) to the longitudinal deformation (or strain) energy without causing it to break.

Answer 15

Modulus of toughness

Question 16

is defined as the actual stress of a material under a given loading.

Answer 16

Working stress

Question 17

The maximum safe stress that a material can carry.

Answer 17

Allowable stress

Question 18

The ratio of this strength (ultimate or yield
strength) to allowable strength.

Answer 18

Factor of safety

Question 19

The ratio of the shear stress τ and the shear strain γ

Answer 19

Shear modulus

Question 20

The ratio of the sidewise deformation (or strain) to the longitudinal deformation (or strain)

Answer 20

Poisson’s ratio