Abstract
The solution of the problem of a helical spring subjected to an axial force
and an axial twisting moment is presented in the work of Love (3). The spring,
which is considered to be a curved thin rod, can suffer large deformations.
The solution is exact in that six nonlinear equations of equilibrium are satisfied.
If the spring is not permitted to expand radially by some type of cylindrical
constraint the spring stiffness will increase. This problem is solved (neglecting
friction) in the work of Blanco and Costello (I). Again an exact solution is
obtained. It is the purpose of this technical note to investigate the pure bending
of a helical spring with large deflections and to see what type of solutions
can be found.
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