For laboratory investigations a rotary bending based on “Wholer system” is often used. The machine is meant for bending test of a cantilever test piece in rotation. The test is conducted by a ready bending moment to a rotating shaft via ball bearings fitted with load hangers. When the shaft rotates the test, piece passes through tension- and compression stresses alternately. The main advantage of this type of machine is its simplicity whereas serious drawback is that the maximum stresses are concentrated on a very short section of the test piece length near the fillet.
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Work of Fatigue Testing Machine
For laboratory investigations a rotary bending based on “Wholer system” is often used. The machine is meant for bending test of a cantilever test piece in rotation. The test is conducted by a ready bending moment to a rotating shaft via ball bearings fitted with load hangers. When the shaft rotates the test, piece passes through tension- and compression stresses alternately. The main advantage of this type of machine is its simplicity whereas serious drawback is that the maximum stresses are concentrated on a very short section of the test piece length near the fillet.
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