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Three-Dimensional Failure Mechanics Theory and Digital Applications

Pengfei Cui^*

Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, China

* Corresponding Author: Pengfei Cui. Email:

The International Conference on Computational & Experimental Engineering and Sciences 2025, 34(1), 1-1. https://doi.org/10.32604/icces.2025.010832

Abstract

With the continuous advancement of aerospace equipment, in addition to performance, function, and reliability requirements, durability is playing an increasingly crucial role. For instance, the objective of China's new - generation space transportation system is to achieve a reliability of 0.9999 or higher for manned flights, and a single rocket is expected to be capable of up to 100 flights. In high - temperature load - bearing structures, nickel - based alloys are extensively used because of their outstanding strength, fatigue resistance, and creep properties. In advanced aerospace engines, their mass fraction can reach as high as 50%. Thus, ensuring the safety and reliability of nickel - based high - temperature structures during long - term service is of vital importance for enhancing the reusability of aerospace equipment. To achieve this goal, the ability to accurately design the lifespan of nickel - based high - temperature structures is essential.
Nevertheless, the existing design method based on two - dimensional fracture theory cannot be precisely applied to the lifespan design of actual three - dimensional structures. Moreover, the vast amount of measurement and control operation data has not been fully exploited. In this study, we establish a series of creep, fatigue, and fracture design methods from the perspective of three - dimensional failure mechanics. By leveraging digital technology, these methods can further enhance the structural efficiency and reliability.

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