Theoretical analysis reveals elastic instability in rods under axial and torsional forces, indicating critical design considerations.
The following problems of elastic instability are theoretically discussed with some calculations and experiments: (a) The buckling under compression of a rod with ends hinged in directions not coincident with its principal axes. (b) The buckling under compression of a rod consisting of two parts, their directions of principal axes not coinciding with each other. (c) General discussion on bucklings of a straight uniform rod having some initial twist under axial, torsional or combined loads. (d) The same problem as (c) when two principal bending rigidities are equal. (e)The buckling under compression of a rod with some initial twist when two principal bending rigidities are unequal. (f) The same problem as (c) when there is no initial twist, especially of a strip.
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Isamu Imachi (1954) studied this question.
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