A Dynamic Photoelastic Investigation of Explosive Induced Fracture

1973 ◽  
Author(s):  
James W. Dally ◽  
William L. Fourney ◽  
David C. Holloway
Keyword(s):  
Photoelastic Investigation

Photoelastic investigation of crack-inclusion interaction

1990 ◽  
Vol 30 (3) ◽  
pp. 253-257 ◽  
Author(s):  
B. J. O'Toole ◽  
M. H. Santare
Keyword(s):  
Inclusion Interaction ◽  
Photoelastic Investigation

Friction and Frictional Rise of Wedge Sliders on Rubber

1969 ◽  
Vol 42 (5) ◽  
pp. 1433-1445
Author(s):  
A. Schallamach
Keyword(s):  
Stress Distribution ◽  
Frictional Force ◽  
Surface Friction ◽  
Simple Theory ◽  
Photoelastic Investigation ◽  
Rubber Surface

Abstract The friction of wedge sliders on rubber depends surprisingly little on the angle between their leading faces and the rubber surface. Friction remains moderate even when this angle is 90°. A simple theory is put forward which accounts qualitatively for the observed limitation of the frictional force and which also predicts an experimentally verified lift of the sliders. In agreement with these findings, a photoelastic investigation of the stress distribution around the sliders reveals that no ramming pressure precedes them in the rubber. The absence of a ramming pressure is attributed to a forward tilt of the rubber which originates from the couple of the frictional force with respect to the undeformed rubber underneath.

The Theoretical and Photoelastic Investigation of Stresses in Chassis Frame Joints

1984 ◽  
Vol 198 (1) ◽  
pp. 63-68
Author(s):  
G H Tidbury ◽  
M S Alvi
Keyword(s):  
Stress Distribution ◽  
Plate Theory ◽  
Test Results ◽  
Classical Plate Theory ◽  
Channel Section ◽  
Photoelastic Investigation ◽  
The Cross ◽  
Theoretical Results

The high stresses in the joints of chassis frames subject to torsion are estimated theoretically and confirmed by tests on photoelastic models. The joints considered are between channel section cross members welded or continuously attached to the webs of channel section side members. The detailed stress distribution in the side members has been estimated using classical plate theory to find the forces resisting the warping displacements of the cross members. Models of joints and a complete frame were made from channel section castings of birefringement material and coated with reflective material to allow the use of a reflection polariscope to analyse the stress distribution. The theoretical results were compared with the results from approximate theories as well as with the photoelastic test results.

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