Method for modeling high-temperature multi-axis stress and strain relationship under tension and torsion loads
A technique of stress-strain, modeling method, applied in the field of fatigue strength
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[0032] The specific embodiment of the present invention will be described with reference to the accompanying drawings.
[0033] The present invention is further illustrated by uniaxial and tension-torsion tests at high temperatures. The test material is GH4169, the material of the turbine disk of an aero-engine, and the test temperature is 650°C. The test adopts strain loading, and the loading waveform is a triangular wave.
[0034] A high-temperature multiaxial stress-strain relationship modeling method under tension-torsion loading, the specific implementation method is as follows:
[0035] Step 1): Use the uniaxial test data to fit the model parameters. The fitted parameter values are shown in Table 1, and the uniaxial stress-strain hysteresis loop is used for verification. The verification effect is shown in figure 2 ;
[0036] Table 1 Fitting parameters using uniaxial high temperature test data
[0037] E k Z n Q b a1 a2 C1 C2 178000 400 2425 ...
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