Fatigue life research and experimental verification of superalloy thin-walled structures subjected to thermal-acoustic loads

Wang, Jian; Zhao, Fengtong; Yu, Sha; Gu, Shitan

doi:10.1016/j.cja.2019.09.012

Cited by 9 publications

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Because structures usually bear composite loads during their operation, some experts have studied the fatigue strength of structures under multi-source composite excitations. Wang et al [24] conducted research on fatigue life prediction for metal thinwalled aircraft structures under thermal acoustic loads and verified it through fatigue tests. Zhang et al [25,26] analyzed the influence of thermal vibration loads on the stress-strain and fatigue life of aviation hydraulic pipelines, and they established a thermal vibration coupled stress model for pipelines.…”

Section: Introductionmentioning

confidence: 99%

Optimal Transport Meshless Method Based Fatigue Life Calculation Method for Hydraulic Pipelines under Combined Excitation

Li,

Fan,

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

The issue of fatigue in modern hydraulic pipelines is increasingly severe, and there remains a lack of effective prediction methods for pipeline fatigue life. In practical engineering, hydraulic pipelines are primarily subjected to random excitation and fluid excitation, representing a typical composite excitation. Most current research relies on solutions considering only single excitations, which leads to inaccuracies. To accurately calculate the fatigue life under composite excitation, this study incorporates resonance excitation and pulsation excitation into the optimal transport meshless method (OTM) within a strong fluid–structure coupling computational framework. Subsequently, by utilizing the hazard point method based on obtained stress data, an estimation of the service life for engine hydraulic lines can be determined. This work provides both practical guidance and theoretical insights for designing hydraulic lines in modern aircraft.

show abstract

Section: Introductionmentioning

confidence: 99%

Optimal Transport Meshless Method Based Fatigue Life Calculation Method for Hydraulic Pipelines under Combined Excitation

Li,

Fan,

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…These combined loads may lead to nonlinear structural response characteristics [1]. Specifically, thin-walled structures are prone to snap-through response under the combined thermal-acoustic loads, and the reverse stress generated by the snap-through response can reduce the structure's fatigue life dramatically [2]. Therefore, it is necessary to probe into the nonlinear response of thin-walled structures under thermal-acoustic loads.…”

Section: Introductionmentioning

confidence: 99%

Acoustic vibration analysis of high-temperature thin-walled structures

Huang,

Hu,

Chen

et al. 2024

Vib. proced.

View full text Add to dashboard Cite

Advanced aerospace structures are subjected to extremely harsh working environment, including of mechanical, acoustic, thermal, and aerodynamic loads. These combined loads can make the structures exhibit complex response, which has already attracted increasing concern in the design of advanced aerospace structures. To tackle the problem, a finite element model (FEM) by discretizing the theoretical differential equation is established to calculate the dynamic response of thin-walled structures under combined thermal and acoustic loads. The numerical analysis indicates that three types of nonlinear responses of the thin plate under combined thermal-acoustic loads are obtained, and the mechanism of snap-through is revealed through two ways: thermal buckling analysis and thermal modal analysis. which can be used to explain the nonlinear response characteristics.

show abstract

“…Hence, further research and validation were needed. Sha et al [26][27][28][29] extensively researched the response and fatigue failure occurring in aeronautical thin-walled structures under high temperatures and intense noise excitations. They carried out numerical simulations and experimental validations of models (e.g., single thin-walled plates) under various coupled loads.…”

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Fatigue life research and experimental verification of superalloy thin-walled structures subjected to thermal-acoustic loads

Cited by 9 publications

References 14 publications

Optimal Transport Meshless Method Based Fatigue Life Calculation Method for Hydraulic Pipelines under Combined Excitation

Optimal Transport Meshless Method Based Fatigue Life Calculation Method for Hydraulic Pipelines under Combined Excitation

Acoustic vibration analysis of high-temperature thin-walled structures

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

Contact Info

Product

Resources

About