Thermodynamic strength theory (TST)

WANG Biao

doi:10.6052/1000-0992-23-017

Volume 53 Issue 3

Sep. 2023

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Wang B. Thermodynamic strength theory (TST). Advances in Mechanics, 2023, 53(3): 693-712 doi: 10.6052/1000-0992-23-017

Citation:

Wang B. Thermodynamic strength theory (TST). Advances in Mechanics, 2023, 53(3): 693-712 doi: 10.6052/1000-0992-23-017

Wang B. Thermodynamic strength theory (TST). Advances in Mechanics, 2023, 53(3): 693-712 doi: 10.6052/1000-0992-23-017

Citation:

Wang B. Thermodynamic strength theory (TST). Advances in Mechanics, 2023, 53(3): 693-712 doi: 10.6052/1000-0992-23-017

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Thermodynamic strength theory (TST)

doi: 10.6052/1000-0992-23-017

WANG Biao^,

School of Physics, Sun Yat-sen University, Guangzhou 510275
Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082
Research Institute of Interdisciplinary Science & School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808

More Information

Corresponding author: wangbiao@mail.sysu.edu.cn
Received Date: 2023-04-25
Accepted Date: 2023-06-03

Available Online: 2023-06-04

Publish Date: 2023-09-30

Abstract

Abstract

The accurate prediction of structural strength of materials is the key issue to the design and optimization of engineering structures and is one of the core problems in solid mechanics. Traditional strength theories mainly rely on empirical formulas, which are largely limited by the applicable materials and working conditions. To ensure safety, engineering structural design often adopts large safety factors, resulting in a significant waste of materials and still can not eliminate the occurrence of catastrophic accidents. How to break through the empirical shackles of traditional strength theories and develop a new theory of structural strength assessment of materials from universal principles is an urgent scientific and engineering problem to be solved. This article briefly summarizes the problems with traditional strength theories, outlines some methods for predicting the failure behavior of the material structures based on the energy theory, and highlights the thermodynamic strength theory proposed by the author. In this theory we treat the material structure as a thermodynamic systems and establish the relationship between the prediction of the failure strength of a material structure with the thermodynamic stability analysis. In principle, this theory has no restrictions on the failure modes of material structures and is applicable to strength prediction for a wide range of failure modes. Several representative examples are used to demonstrate the correctness and wide applicability of the theory, which reflects excellent prospects for engineering applications.
- Strength theory,
- Thermodynamics,
- Failure criterion,
- Stability analysis

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References(64)

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