A Prediction Method for Modulus Decay of Braided Ceramic Matrix Composites
A technology of composite materials and prediction methods, applied in design optimization/simulation, instrumentation, electrical digital data processing, etc., can solve problems such as unconsidered impact and unsatisfactory accuracy of prediction results
Active Publication Date: 2020-09-22
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
However, the influence of environmental factors on the modulus of its composite materials is not considered, and the accuracy of the prediction results is not ideal
Method used
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Embodiment 1
[0143] Taking the fiber-reinforced SiC / CAS ceramic matrix composite as the test sample, the modulus decay of the test sample is predicted:
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The invention belongs to the technical field of prediction of modulus decline of ceramic matrix composites, and particularly relates to a prediction method of modulus decline of a woven ceramic matrixcomposite considering environmental influence. According to the method, in the process of constructing the relation equation of the stress and the modulus of the woven ceramic-based composite material, parameters related to the temperature are permeated into all the steps, and the delay modulus decline prediction accuracy of a woven ceramic-based composite material matrix is improved. Results ofthe embodiment show that the prediction method provided by the invention can be used for accurately predicting the hysteresis modulus decline of the woven ceramic matrix composite material.
Description
technical field [0001] The invention belongs to the technical field of modulus decline prediction of ceramic matrix composite materials, and in particular relates to a method for predicting modulus decline of braided ceramic matrix composite materials in consideration of environmental impact. Background technique [0002] Braided ceramic matrix composites have the advantages of high temperature resistance, corrosion resistance, low density, high specific strength, and high specific modulus. Compared with superalloys, they can withstand higher temperatures, reduce cooling airflow, and improve turbine efficiency. Therefore, they have become Preparation materials for various devices such as aero-engine combustors, turbine guide vanes, turbine shell rings, and tail nozzles. The high-pressure turbine of the LEAP (Leading Edge Aviation Propulsion, LEAP) series engine developed by CFM uses braided ceramic matrix composites. For example, the LEAP-1B engine provides power for the Air...
Claims
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IPC IPC(8): G06F30/20G06F119/14
Inventor 李龙彪
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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