Use of weight functions and photoelastic experimental hybrid method to study the contact problem

作者：Mose B R; Maranga S M; Alunda B O; Hawong J S^*; Shin D C

来源：Materialwissenschaft und Werkstofftechnik, 2015, 46(6): 603-612.

DOI：10.1002/mawe.201500274

• Weight functions
• contact stresses
• photoelastic experimental hybrid method

The contact problem involving flat punches has been the subject of many investigations mainly due to the crucial role it plays in many engineering applications. The contact problem has however, been widely approached from a theoretical point of view and there is a lack of experimental verifications due to the limited number of laboratory techniques capable of supplying detailed information about contact parameters. In order to gain an understanding of such problems, this study uses an experimental approach to investigate the stresses arising from photoelastic models when compressed against each other using Riemann-Hilbert's weight functions and photoelastic experimental hybrid method. The study shows that this approach is effective in determining the magnitudes of contact stresses as well as interior stresses which up to date have been scarcely investigated. It is further shown that high stresses exist when a photoelastic model with a sharp corner is pressed against straight surface of the bottom half space and by introducing fillet radii at the sharp corners, significant stress reductions of up to 62.66% is observed.

• 出版日期2015-6