Strength Of Materials

Question 1

It deals with analyzing stresses and deflections in materials under load. Also known as Mechanics of Deformable Bodies.

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 loaded by a normal/perpendicular force.

Answer 3

Axial Stress/Normal Stress

Question 4

Is a force that causes layers or parts to slide upon each other in opposite directions.

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 structural members like slabs and foundation by shear under the action of concentrated loads.

Answer 7

Punching Shear

Question 8

A tank or pipe carrying a fluid or gas under a pressure is subjected to tensile forces, which resist bursting, developed by longitudinal and transverse sections.

Answer 8

Thin-Walled Pressured Vessels

Question 9

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

Answer 9

Proportional Limit

Question 10

The stress is directly proportional to strain.

Answer 10

Hooke’s Law

Question 11

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 11

Elastic point

Question 12

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

Answer 12

Yield point

Question 13

The maximum ordinate in the stress-strain diagram.

Answer 13

Ultimate Strength

Question 14

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

Answer 14

Rupture Strength/ Breaking Strength

Question 15

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 15

Modulus of resilience

Question 16

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

Answer 16

Working Stress

Question 17

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 17

Modulus of toughness

Question 18

The maximum safe stress that a material can carry.

Answer 18

Allowable stress

Question 19

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

Answer 19

Factor of Safety

Question 20

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

Answer 20

Shear modulus

Question 21

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

Answer 21

Poisson’s ratio

Question 22

-In solid mechanics, it is the twisting of an object due to an applied torque
-In circular sections, the resultant shearing stress is perpendicular to the radius.

Answer 22

Torsion