Terms (Simple Stress)

Question 1

Deals with their relations between externally applied loads and their internal effects on bodies

Answer 1

Strength of materials

Question 2

Two fundamental concepts of strength of materials

Answer 2

Strength and rigidity

Question 3

This component measures the pulling or pushing action perpendicular to the section

Answer 3

Axial force

Question 4

A pull represents a —— force the tends to elongate the member

Answer 4

Tensile force

Question 5

A push is a —— force the tends to shorten it

Answer 5

Compressive force

Question 6

The actual force is often denoted by the letter

Answer 6

P

Question 7

These are components of the total resistance to sliding the portion to one side of the exploratory section past the other

Answer 7

Shear force

Question 8

The resultant fear force is usually designated by the letter

Answer 8

V

Question 9

Component measures the resistance to twisting the member

Answer 9

Torque

Question 10

Torque is commonly given the symbol/letter

Answer 10

T

Question 11

These components, measure the resistance to bending the member about the Y or Z axis, and are often denoted merely by MY or MZ

Answer 11

Bending moments

Question 12

Is usually defined as the stress in the material

Answer 12

Unit strength of a material

Question 13

Stress is expressed symbolically as

Answer 13

O= P/A

Question 14

Stress or force per unit area

Answer 14

Ō (sigma)

Question 15

What does the letter P stand for?

Answer 15

Applied load

Question 16

What does the letter A stand for?

Answer 16

Cross-sectional area

Question 17

Force is measured in

Answer 17

Newtons

Question 18

Area is measured in

Answer 18

Square meters

Question 19

Unit for stress

Answer 19

Newton per square meter

Question 20

Three assumptions used in the elementary analysis of trusses

Answer 20

1. Weights of the members are neglected.
2. All connections are smooth pins.
3. All external loads are applied directly to the pins.

Question 21

The method of analyzing a single joint

Answer 21

Method of joints

Question 22

The analysis of a section of the trust, composed of two or more joints is called the

Answer 22

Method of sections

Question 23

It is caused by forces acting along or parallel to the area, resisting the forces

Answer 23

Shearing stress

Question 24

Caused by forces perpendicular to the areas on which they act

Answer 24

Tensile and compressive stress

Question 25

Tensile and compressive stresses are frequently called

Answer 25

Normal stresses

Question 26

Shearing stress may also be called

Answer 26

Tangential stress

Question 27

Cases of shear stresses

Answer 27

Single shear and double shear

Question 28

The shear occurs over an area parallel to the applied load

Answer 28

Direct shear

Question 29

May occur over sections inclined with the resultant load

Answer 29

Induced shear

Question 30

A contact pressure between separate bodies

Answer 30

Bearing stress

Question 31

This stress is usually called the tangential stress because it acts tangent to the surface of the cylinder

Answer 31

Circumferential stress

Question 32

It is called —— because the dark parallel to the longitudinal axis of the cylinder

Answer 32

Longitudinal stress

Question 33

—— is 1/2 the value of the tangential stress

Answer 33

Longitudinal stress