ISSN:
1741-2765
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The paper describes the use of the embedded-strain-gage technique for the measurement of the strain distribution below a circular surface of contact supporting normal and tangential forces while the bodies in contact are rolling together. A brief description is given of the method used for embedding strain gages at very small depths below the surface of a model sphere of epoxy resin. The rig used for pressing the model against another sphere of the same material, driving one of them and restraining the other, is also described together with the instrumentation. A preliminary series of static tests shows that the measured subsurface strains are in good agreement with Hertz's theory of contact. For tests under rolling conditions, the recorded results of a strain gage under different load levels are easily converted to a common nondimensional scale by photographic enlargement or reduction of the original recorded trace. A special Wheatstone-bridge configuration also permits the direct measurement of orthogonal shear strains by combining the output of the gages of embedded rectangular rosettes. Some typical results are given.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02327407
