An evaluation system for evaluating target members is provided. The evaluation system comprises an information processing device having a processor. The processor is configured to: in a first acquiring step, acquire reference information related to a relationship between a first physical amount and a second physical amount for a reference material, wherein a target material of the target member and the reference material belong to a group of materials, and wherein the first physical amount and the second physical amount for the reference material are different physical amounts related to a creep test of a reference member composed of the reference material; in a second acquiring step, acquire a first physical amount related to a creep test performed on the target member; and in an evaluating step, evaluate a second physical amount of the target member based on the reference information and the first physical amount of the target member.

A method and system for evaluating the performance of metallic materials based on creep-fatigue interaction, comprising: based on elastic-plastic property data and creep property data of metallic materials, calculating the monotonic crack tip opening displacement and cyclic crack tip opening displacement caused by plasticity or creep of short cracks under maximum far-field stress and far-field cyclic stress, respectively; using the linear superposition method to obtain the total monotonic crack tip opening displacement and cyclic crack tip opening displacement of short cracks under the combined creep-fatigue action; by calculating the short crack growth rate of the metallic material under creep-fatigue interaction, the performance of the metallic material is evaluated. The invention solves the problems of traditional methods, such as relying on a large amount of crack growth experimental data and insufficient consideration of creep-fatigue short crack effects.

Disclosed herein are devices and methods for generating and/or verifying a predictive temperature stress and time creep modulus, approving or rejecting a medical device, verifying a medical device design using a linear device model, and generating coefficients using thermal analysis.

A method and system for determining a critical inelastic strain rate during a creep-fatigue damage process are provided. The method includes: obtaining a plurality of high-temperature equipment materials; under a same temperature condition, conducting a creep test, a fatigue test, and a creep-fatigue interaction test on the high-temperature equipment materials, respectively; establishing a stress relaxation formula based on the creep test result; establishing a fitting equation for an inelastic strain energy density at a failure based on the fatigue test result; establishing a net tensile hysteresis energy-induced fatigue damage equation based on the creep-fatigue interaction test result; and according to a linear cumulative damage rule, determining a creep-fatigue life of the high-temperature equipment materials based on the stress relaxation formula, the fitting equation for an inelastic strain energy density at a failure, and the net tensile hysteresis energy-induced fatigue damage equation.