Properties of materials Flashcards Preview

Technology 3 - Building Science and Structures > Properties of materials > Flashcards

Flashcards in Properties of materials Deck (64):
1

fundamental requirements of structures (3)

to enclose a space, withstand forces and transmit them to the ground, load-bearing capacity of soil

2

types of building loads (4)

the weight imposed by the building itself, weight of snow or rain, wind loads, weight of occupants and contents

3

the weight imposed by the building itself, weight of snow or rain, wind loads, weight of occupants and contents are types of...

building loads

4

to enclose a space, withstand forces and transmit them to the ground, load-bearing capacity of soil are...

fundamental requirements of structures

5

definition of force

that which produces a deformation in material

6

that which produces a deformation in material is known as

force

7

What is Strength

The ability to resist failure or excessive Plastic deformation under stress

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The ability to resist failure or excessive Plastic deformation under stress is also Known as

Strength

9

definition of stress

intensity of force

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intensity of force is known as

stress

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equation for calculating stress

stress = force(PSI or MN/M²) / area of which force acts

12

stress = force(PSI or MN/M²) / area of which force acts

equation for calculating stress

13

types of stress (3)

tensile = tension stress (pulling)
compressive = compression (pushing)
shear = friction/tortion

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tensile, compressive and shear are types of...

stress

15

bending stresses are...

dead load on a steel beam. Top half is in compression, bottom half is in tension. Neutral zone is in shear stress.

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dead load on a steel beam is a...

bending stress

17

properties of steel (4)

high strength in tension, compression, shear, bending

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deformation is...

consequences of application of force

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consequences of application of force is known as...

deformation

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high strength in tension, compression, shear and bending are properties of...

steel

21

characteristics of deformation (2)

magnitude = amount
type = plastic or elastic

22

plastic, elastic and magnitude are characteristics of what?

deformation

23

definition of strain

strain is deformation due to stress

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Deformation due to stress is known as

Strain

25

strain is calculated by

change in dimension / original dimension = strain

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change in dimension original dimension =

strain

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tensile and compressive strain are..

direct strains

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examples of direct strains (2)

tensile and compressive

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sheer strain is...

indirect strain

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indirect strain is known as...

sheer strain

31

elastic deformation is

fully recoverable

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which type of deformation is fully recoverable?

elastic deformation

33

plastic deformation is

permanent deformation

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which type of deformation is permanent?

plastic deformation

35

within plastic deformation, tension has high...

ductility

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tension has high ductility within...

plastic deformation

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ductility is...

a solid material's ability to deform under tensile stress

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a solid material's ability to deform under tensile stress is known as...

ductility

39

What is Stiffness

Ability of a material to resist elastic deformation under load

40

Ability of a material to resist elastic deformation under load is Known as

Stiffness

41

What is toughness

The ability of a material to absorb energy by impact or sudden blow

42

The ability of a material to absorb energy by impact or sudden blow is known as

Toughness

43

The equation used to measure stiffness is...

Young's Modulus (E)

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Young's Modulus is used to measure...

Stiffness.

45

The equation for Young's Modulus is...

Stress (Tensile or Compressive) / Elastic Strain

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Stress (Tensile or Compressive) / Elastic Strain is the equation for

Young's Modulus.

47

Material Stiffness can be referred to as....

Young's Modulus

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Young's Modulus can also be referred to as

Material stiffness.

49

Component Stiffness...

is governed by shape of component and distribution of material

50

The shape of a component and the distribution of material leads to...

Component Stiffness.

51

Lateral supports e.g.Herringbone Struts prevent...

twist and shear stress, resulting in a reduced risk for cracked ceilings.

52

The lateral supports which reduce the twists and shear stresses are...

Herringbone Struts.

53

The components of a steel I beam are (2)

Flange (Top & Bottom) Web (Middle)

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Flange (Top & Bottom) Web (Middle) are components in...

Steel I beams.

55

What is Hardness

Resistance to Indentation under Stress

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Resistance to Indentation under Stress is known as

Hardness

57

What are the long term mechanical properties (2)

Creep & Fatigue

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Creep & Fatigue are characteristics of....

Long term mechanical properties.

59

What is Creep

The effect of long term Stress, leading to additional distortion or failure

60

The effect of long term Stress, leading to additional distortion or failure is known as

Creep.

61

What is Fatigue

The effect of load reversals such as vibrations which lead to failure at relatively low stress.

62

The effect of load reversals such as vibrations which lead to failure at relatively low stress.

Fatigue

63

Dimensional changes can by produced by... (2)

changes in moisture content, changes in temperature.

64

changes in moisture content &changes in temperature can result in....

Dimensional Changes.