VM-WB-MECH-028

VM-WB-MECH-028
Bolt Pretension Load Applied on a Semi-Cylindrical Face

Overview

Reference:	Any standard Strength of Materials book
Solver(s):	Ansys Mechanical
Analysis Type(s):	Static Structural Analysis
Element Type(s):	Solid

Test Case

A semi-cylinder is fixed at both the end faces. The longitudinal faces have frictionless support. A bolt pretension load is applied on the semi-cylindrical face. To get accurate results, apply sizing control with element size of 0.01 m.

Find the Z directional deformation and the adjustment reaction due to the bolt pretension load.

Figure 31: Schematic

Material Properties

Geometric Properties

E = 2e11 Pa

ν = 0.0

Length L = 1 m

Diameter D = 0.05 m

Pretension as preload = 19.635 N (equal to adjustment of 1e-7 m)

Analysis

The bolt pretension load applied as a preload is distributed equally to both halves of the bar. Therefore the z-directional deformation due to pretension is given by:

Results Comparison

Results	Target	Mechanical	Error (%)
Minimum z-directional deformation (m)	-5.00E-08	-5.0002E-08	0.004
Maximum z-directional deformation (m)	5.00E-08	4.9502E-08	-0.996
Adjustment Reaction (m)	1.00E-07	1.00E-07	0.000