Torsion Module

  • Torsion of circular cross-sections is considered by the MDSolids software. Four different torsion member options are available.
  • The user can define a simple torsion member (i.e., one shaft with one torque). This shaft is shown as a 3-dimensional representation. A grid is superimposed on the shaft to illustrate the twisting produced by a torque.
  • Mohr's circle calculations can be initiated from this torsion option. Standard values for shear moduli are available to the user by simply clicking on the desired material in a drop-down menu.
  • Optionally, an axial force can also be considered in the problem, and if the shaft is a pipe shape, the effects of pressure can be included. This permits problems with combined axial and torsion effects to be considered.

Screenshot (160k)

  • Two torsion options consider power transmission problems. One of these options considers a single shaft connected to a motor while the second option considers a power shaft connected by gears to an idler shaft.
  • The power/idler shaft option also includes an animated motor and gear movement with simulated throttles so that users can observe the effects produced by changing motor power, speed, or gearing ratio.

Screenshot (125k)

  • Each of these three options feature a flexible problem definition format. The user enters the known variables and the software solves for the remaining variables.
  • Extra explanations describe in words the specific procedure that should be used to solve each problem.
  • A fourth torsion option considers a single shaft with multiple torques. This option produces a torque diagram, a shear stress diagram, and a twist angle diagram.

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  • The torsion module also includes two routines pertaining to statically indeterminate torsion assemblies:
    • Torsion of coaxial shafts
    • Torsion of end-to-end shafts

Indeterminate torsion coaxial

Screenshot (222k)

Indeterminate torsion coaxial

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