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Proceedings Paper

Measurement of residual stress during implant resistance welding of plastics
Author(s): Joon B. Park; Avraham Benatar
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Paper Abstract

The formation of residual stress during plastic welding can adversely affect the quality of the joint. Residual stress can reduce the solvent resistance of the polymer as well as the tensile strength and fatigue life of the joint. Therefore, it is vital to predict and measure the level of residual stresses. The formation of thermal and residual stresses during implant resistance welding of polycarbonate was studied. Thermocouples and an infrared temperature sensor were used to measure the temperature distribution and temperature history in the parts during welding. The formation of thermal and residual stresses was predicted using 2-D finite element analysis in conjunction with non-isothermal linear viscoelasticity for a thermorheologically simple material. The residual stresses in the parts were determined using both photoelasticity and moiré interferometry. Theoretical prediction of residual stresses were in good agreement with measurements.

Paper Details

Date Published: 1 December 1991
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Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); doi: 10.1117/12.57420
Show Author Affiliations
Joon B. Park, Ohio State Univ. (United States)
Avraham Benatar, Ohio State Univ. (United States)


Published in SPIE Proceedings Vol. 1554:
Second International Conference on Photomechanics and Speckle Metrology
Fu-Pen Chiang; Fu-Pen Chiang, Editor(s)

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