Fatigue load-contained metal structure calendar life confirming method

Abstract

The invention provides a method, belonging to the material failure and protection technical field, which mainly solves the problem that: how to consider the effect of the fatigue load, in determination process of calendar life of the metal structure and device. The technical proposal is that: (1) compiling an one-year application temperature spectrum and a failure load spectrum; (2) determining the corrosion solution components and test acceleration multiple; (3) respectively recurrently performing a first-level corrosion test of metal test piece of high-concentration solution and a fatigue test, in the application temperature spectrum and fatigue load spectrum, until the test piece damage goes the critical damage value Dc; (4) calculating the calendar life Hc using a model (1)(saw upper right). Dt in model (1) is obtained by the corrosion and fatigue combination test and Dc is the given clinical corrosion damage value, dt is the known test solution concentration, Lambada is the test cycle period obtained by test, Sigma hi is the known application temperature spectrum, thus the calendar life of the metal structure and device containing the fatigue load Hc can be obtained.

Description

Technical field [0001] The invention belongs to the field of material failure and protection. technical background [0002] Since some metal structures and equipment are not only affected by the corrosive environment but also by the fatigue load during use, when determining the calendar life of these structures and equipment, only the effect of the corrosive environment is considered, and the fatigue load is not considered. The effect is unreliable. At present, at home and abroad, how to consider the influence of fatigue load in the determination of calendar life, there is no easy method for engineering application. The method of the present invention solves this problem. Contents of the invention [0003] In the method of the present invention, in the test of one-level high-concentration corrosion solution and one-year service temperature spectrum, the one-year service fatigue load spectrum is randomly added, so that the corrosion damage D in the test is t It is the re...

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Problems solved by technology

At present, at home and abroad, how to consider the influence of fatigue load in the

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