Column buckling worksheet with answers

Free printable Column buckling worksheet: 6 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

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1.Easy
PL = 6 m20 × 60 mmcross-section

A column of length L made of steel is pinned at both ends. Using Euler’s formula, find its critical buckling load Pcr.

L = 6 mE = 200 GPa (steel)b × h = 20 × 60 mm
Pcr = kN
2.Easy
PL = 1.5 md = 40 mmcross-section

A column of length L made of aluminium is pinned at both ends. Using Euler’s formula, find its critical buckling load Pcr.

L = 1.5 mE = 70 GPa (aluminium)d = 40 mm
Pcr = kN
3.Medium
PL = 5 md = 80 mmcross-section

A column of length L made of steel is fixed at both ends. Using Euler’s formula, find its critical buckling load Pcr.

L = 5 mE = 200 GPa (steel)d = 80 mm
Pcr = kN
4.Medium
PL = 6 m30 × 100 mmcross-section

A column of length L made of steel is fixed at the base and free at the top. Using Euler’s formula, find its critical buckling load Pcr.

L = 6 mE = 200 GPa (steel)b × h = 30 × 100 mm
Pcr = kN
5.Hard
P = 60 kNL = 5 md = ?cross-section

A solid round column of length L made of steel is fixed at both ends. It must carry 60 kN with a factor of safety of 2.5 against buckling. Find the smallest diameter d.

P = 60 kNn = 2.5L = 5 mE = 200 GPa (steel)
d = mm
6.Hard
P = 65 kNL = 2.5 md = ?cross-section

A solid round column of length L made of steel is fixed at both ends. It must carry 65 kN with a factor of safety of 2.5 against buckling. Find the smallest diameter d.

P = 65 kNn = 2.5L = 2.5 mE = 200 GPa (steel)
d = mm

Answer key

  1. 1. Pcr = 2.193 kN
  2. 2. Pcr = 38.59 kN
  3. 3. Pcr = 635 kN
  4. 4. Pcr = 3.084 kN
  5. 5. d = 55.77 mm
  6. 6. d = 40.23 mm

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