Mechanical properties of materials• H.W.:• The following data where obtained during the tensile test of mild steel circular bar 12.75 mmdiameter and 203.2 mm gauge length. Determine the following:1) The apparent stress at each point2) Strain at each point3) True stress at each point (Assume D at failure is 8,51 mm and D at max. load is 11.15 mm)4) Draw stress - strain curved based on:a) Original cross sectional areab) True cross sectional area5) Proportional limitMechanical properties of materials6) Modulus of elasticity7) Upper and lower yield point8) Ultimate strength9) Breaking strength based on the original cross sectional area and on true cross sectional area10) Percentage of elongation11) Percentage of reduction in cross sectional area.12) Ductility, Resilience and toughnessLoad (N)43931690229357333603362735584413664883952709553785635643768Deformation0.02540.1270.2280.3050.3563.816.3511.6816.7626.924376842.42(mm )

Mechanical properties are those properties of a material which can be observed under the action of a…

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Mechanical properties of materials H.W.: The following data where obtained during the tensile test of mild steel circular bar 12.75 mm diameter and 203.2 mm gauge length. Determine the following:

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Chapter2: Loads On Structures

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Question

Mechanical properties of materials
• H.W.:
• The following data where obtained during the tensile test of mild steel circular bar 12.75 mm
diameter and 203.2 mm gauge length. Determine the following:
1) The apparent stress at each point
2) Strain at each point
3) True stress at each point (Assume D at failure is 8,51 mm and D at max. load is 11.15 mm)
4) Draw stress - strain curved based on:
a) Original cross sectional area
b) True cross sectional area
5) Proportional limit
Mechanical properties of materials
6) Modulus of elasticity
7) Upper and lower yield point
8) Ultimate strength
9) Breaking strength based on the original cross sectional area and on true cross sectional area
10) Percentage of elongation
11) Percentage of reduction in cross sectional area.
12) Ductility, Resilience and toughness
Load (N)
4393
16902
29357
33360
33627
35584
41366
48839
52709
55378
56356
43768
Deformation
0.0254
0.127
0.228
0.305
0.356
3.81
6.35
11.68
16.76
26.92
43768
42.42
(mm )

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Step 1 : Introduction

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Step 2 : Calculate the apparent stress at each point

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Step 3 : Calculate the strain at each point

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Step 4 : Draw stress strain curve based on original and true cross sectional area

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Step 5 : Calculation of proportional limit

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Step 6 : Calculate the term 'modulus of elasticity'

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