To investigate the effect of high hydrostatic pressure on the short-life fatigue property of an alloy steel a new high pressure fatigue machine was designed and developed to apply simultaneously to the specimen: (1) constant high fluid pressure in the range of atmospheric to 45 000 lbf/in2; (2) mean uniaxial tensile or compressive strain; (3) cyclic push-pull strain at a selected strain rate. In addition the machine should be able to apply a constant stress cycle and the shape of the strain-time cycle should be adjustable.
The design and development of this high pressure push-pull testing machine is described in detail.
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