Measurement of residual stresses in polymeric parts by indentation method
- Measurement of residual stresses in polymeric parts by indentation method
- 박성열; 김성륜; 김성호; 윤재륜
- Hole drilling method; Indentation method; Injection molding; Numerical analysis; Residual stress
- Issue Date
- Polymer testing
- VOL 32, NO 5, 946-952
- An indentation method was studied as a means of measuring the residual stress in an
injection molded polymeric specimen because destructive methods restrict the reuse of
measured parts and it is not possible to apply them to small and complicated parts. The
load-displacement curve was measured for indentation at stressed and non-stressed positions.
Residual stress distribution of the injection molded part was calculated by
comparing the load-displacement curve results with respect to the indentation depth. The
residual stresses measured by the indentation method were reliable because they were in
good agreement with numerical results and those measured by the hole drilling method.
The indentation method can be utilized to measure the residual stresses in polymeric parts
for practical applications, particularly for small or complicated parts.
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