Development of Long-term Creep-fatigue Testing Machines

Abstract

Two types of long-term creep-fatigue testing system have been newly developed; onewith a cam-and-lever driven by a servo-electric motor, and the other with a heat-actuator where the temperature is controlled in a closed loop circuit. Characteristics of the systems are summarizedas follows:
(1) Axial strain control is possible with in limited strain rate.
(2) The mechanism is simple and compact.
(3) Reliability is high and maintenance is easy.
(4) The systems are suitable for the tests with long strain holds at high temperatures.
(5) Simulation tests of actual thermal and strain histories for high temperature component are applicable.