Method for forecasting engineering service life of glass fiber reinforced plastic sleeve

Abstract

The invention discloses a method for forecasting the engineering service life of a glass fiber reinforced plastic sleeve, which comprises the following steps of: 1, analysis of the working conditions, i.e. analyzing the working conditions and determining the main strained condition and the hygrothermal aging condition of the glass fiber reinforced plastic sleeve; 2, determination of safety coefficients, i.e. measuring relative mechanical properties by utilizing a test sample, measuring the stress of the glass fiber reinforced plastic sleeve by the field test and further determining the working safety coefficients of the glass fiber reinforced plastic sleeve; 3, establishment of a short-period hygrothermal aging function, i.e. carrying out hygrothermal aging test on the test sample for 1,000 hours to establish the hygrothermal aging function; and 4, forecasting of the engineering service life, i.e. selecting the safety coefficient according to the minimum rule, carrying out integration on the safety coefficient and the hygrothermal aging function to establish a glass fiber reinforced plastic sleeve engineering service life estimation model, setting the residual safety coefficients as 2 and extrapolating to 100 thousand of hours according tot he estimation model. The method can be used for accurately forecasting the engineering service life of the glass fiber reinforced plastic sleeve. The method has the advantages of time saving, economy and simple method.

Description

technical field [0001] The invention relates to a method for predicting the engineering life of a fiberglass casing. Background technique [0002] The engineering life of the FRP casing refers to the duration of the FRP casing in a reasonable installation state, which can perform the design function with high reliability according to the operating parameters specified in the design without major maintenance. The engineering life of FRP casing is an important engineering parameter, which is of great significance to the entire equipment engineering design and research. However, FRP casing is significantly different from metal materials and general composite materials in terms of service conditions, service process, failure process, failure mechanism and influencing factors, and its fatigue problem is much more complicated. Therefore, how to develop an accurate and credible engineering life prediction method according to the special service conditions of FRP casing is a very i...

AI Technical Summary

Problems solved by technology

However, compared with metal materials and general composite materials, the fatigue life of FRP casing is much more complicated than that of metal materials and general composite materials, regardless of the use conditions, use process, or failure process, failure mechanism and influencing factors.

At present, there is no standard for life prediction of FRP casing engineering at home and abroad.

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