A steel rod (diameter 20 mm, E = 200 GPa) sits inside a tube made of brass (outer diameter 120 mm, inner diameter 70 mm, E = 100 GPa). Both are 600 mm long and are compressed together between rigid plates by 100 kN. Find the compressive stress σr in the rod.
Axial stress & strain worksheet with answers
1.Easy
P = 100 kNrod: Ø20 mm, E = 200 GPatube: Ø120/Ø70 mm, E = 100 GPaL = 600 mm
σr = MPa
2.Easy
A solid round bar carries an axial tensile load P. Find the normal stress σ in the bar.
P = 75 kNd = 20 mm
σ = MPa
3.Medium
Find the axial strain ε in the aluminium bar, in microstrain (µε = 10⁻⁶).
P = 110 kNd = 25 mmL = 1 mE = 70 GPa
ε = µε
4.Medium
Find the axial strain ε in the steel bar, in microstrain (µε = 10⁻⁶).
P = 95 kNd = 20 mmL = 0.5 mE = 200 GPa
ε = µε
5.Hard
The stepped bar is fixed at the wall and loaded at its free end. Find the total elongation δ.
P = 90 kNsegment 1: Ø35 mm, 1.5 m, aluminium (E = 70 GPa)segment 2: Ø20 mm, 1 m, brass (E = 100 GPa)
δ = mm
6.Hard
A steel segment (diameter 25 mm, length 400 mm, E = 200 GPa) and a segment made of brass (diameter 60 mm, length 500 mm, E = 100 GPa) are joined end to end and fixed between two rigid walls. An axial load of 100 kN acts at the joint, towards segment 2. Find the magnitude of the stress σ2 in segment 2.
segment 1: steel, Ø25 mm, 400 mm, E = 200 GPasegment 2: brass, Ø60 mm, 500 mm, E = 100 GPaP = 100 kN
σ2 = MPa
Answer key
- 1. σr = 24.72 MPa
- 2. σ = 238.7 MPa
- 3. ε = 3201 µε
- 4. ε = 1512 µε
- 5. δ = 4.869 mm
- 6. σ2 = 24.66 MPa
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