Modeling ultrasonic vibration fatigue with unified mechanics theory

Lee, Hsiao Wei; Basaran, Cemal; Egner, Halina; Lipski, Adam; Piotrowski, Michał; Mroziński, Stanisław; M, Noushad Bin Jamal; Rao, C. Lakshmana

doi:10.1016/j.ijsolstr.2021.111313

Cited by 21 publications

(5 citation statements)

References 71 publications

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“…Furthermore, a damage evolution can be calculated along the thermodynamic state index axis, with values ranging from zero to one. UMT has been utilized in various fatigue tests, e.g., Lee et al 115 incorporated the two‐scale model shown in Figure 10 and described in section 2.4 into this method for test frequencies of 30 Hz and 20 kHz. A review paper offers a comprehensive summary of this theory and its applications 116 …”

Section: Fatigue Life Prediction Methodsmentioning

confidence: 99%

Thermo‐based fatigue life prediction: A review

Teng

2023

Fatigue Fract Eng Mat Struct

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The main objective of this review paper is twofold: Recall the most captivating areas of research in predicting the fatigue life of metals with the application of thermal methodology, particularly for the stress‐controlled fatigue tests. The explicit lifetime models reviewed have been developed by scholars over the past two decades owing to the advancements in infrared thermal imaging technology. Introduce, discuss, and conclude a broad range of alternative theoretical frameworks in thermodynamics. Some investigations are made with the previous methods, including the most recent evolutions of lifetime models for structural integrity across various fields. Some future perspectives are provided in final, which could pave the way for a new realistic or potential capability.

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Section: Fatigue Life Prediction Methodsmentioning

confidence: 99%

Thermo‐based fatigue life prediction: A review

Teng

2023

Fatigue Fract Eng Mat Struct

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“…These microstructural changes often happen in the region where the stress concentration, such as grain boundaries, dislocations, vacancies, and other defects, occurs [29,30]. Thus, the main objective in this field is to gain an understanding of the relationship between fatigue behaviors and energy dissipation, realizing a rapid fatigue evaluation, including fatigue life [8,[31][32][33][34] and fatigue limit, from the macroscopic scale level [33,35]. This has motivated scholars to examine the correlation between energy dissipation and the motion of the internal microstructure of materials.…”

Section: Figurementioning

confidence: 99%

A Review of Fatigue Limit Assessment Using the Thermography-Based Method

Wei,

He,

Sun

et al. 2024

Metals

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Fatigue limit assessment methodologies based on the thermography technique are comprehensively studied in this work. Three fundamental indicators pertaining to temperature increase, intrinsic energy dissipation, and thermodynamic entropy are discussed in sequence. The main train of thought of thermo-based research is outlined. The main objective of this paper is, on the one hand, to describe some works that have been accomplished in this field and, on the other hand, to present further potential for future studies involving fatigue behaviors and thermography approaches.

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“…The study results highlighted that the techniques for predicting fatigue life, strain response, and natural frequency under strong noise excitation are still incomplete, requiring further development to enhance design practicality. Moreover, Lee et al [19][20][21] combined the second law of thermodynamics with Newton's laws to effectively predict high-cycle fatigue life based on Unified Mechanics Theory (UMT). The presented work has not relied on traditional empirical curve fitting, providing an important alternative perspective.…”

Section: Introductionmentioning

confidence: 99%

Acoustic and Vibration Response and Fatigue Life Analysis of Thin-Walled Connection Structures under Heat Flow Conditions

Sha,

Zhao,

Tang

et al. 2024

Aerospace

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Thin-walled connection structures are commonly used in the hot-end components of aerospace vehicles. Large deflection nonlinear responses and fatigue failure occur due to their discontinuous mass distribution and prominent cross-sectional changes under the action of complex thermal, aerodynamic, and noise loads. A thermoacoustic fatigue test was carried out to obtain the acoustic and vibration responses and fatigue life changes of the connection structure under heat flow conditions in engineering applications. The high-temperature acoustic fatigue test system of aviation thin-walled structures was used, taking the high-temperature alloy thin-walled plate-load-bearing frame bolted connection structure as the research object. As a result, the vibration response and fatigue life under different thermoacoustic loads were obtained. The contact finite element method was used to simulate the connection pre-tightening force, and the coupled finite element/boundary element method was used to calculate the acoustic and vibration response of the heat flow conditions. The changing rules of the frequency response peak value at the critical point of the thin-walled connection structure under the effects of different temperature fields, fluid fields, and sound fields were obtained through the processing and analysis of the calculation results. Considering the structural vibration fatigue damage mechanism, this study employed an improved rainflow counting method to compute the rainflow circulation matrix (RFM) and rainflow damage matrix (RFD) of the vibration stress time history at critical points within the structure framework. Said method was combined with Miner’s linear cumulative damage theory to estimate the fatigue life under various thermal-fluid-acoustic coupled loads. A comprehensive analysis validates the accuracy of the established numerical simulation calculation model in identifying critical connection points within structures subjected to pre-tightening forces. This model effectively characterizes thermal, aerodynamic, and acoustic loads on high-temperature alloy thin-walled-load-bearing frame bolted connection structures. It delineates the relationship between vibration response and fatigue life while assessing the impact of three distinct load parameters.

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Modeling ultrasonic vibration fatigue with unified mechanics theory

Cited by 21 publications

References 71 publications

Thermo‐based fatigue life prediction: A review

Thermo‐based fatigue life prediction: A review

A Review of Fatigue Limit Assessment Using the Thermography-Based Method

Acoustic and Vibration Response and Fatigue Life Analysis of Thin-Walled Connection Structures under Heat Flow Conditions

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