Damage evaluation and life prediction of pilot’s intervertebral disc based on continuum damage mechanics

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue Pub Date : 2024-12-25 DOI:10.1016/j.ijfatigue.2024.108781

Jinglong Liu, Huiwen Huang, Peng Xu, Lizhen Wang, Zhixin Liu, Yubo Fan

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引用次数: 0

Abstract

Pilot’s cervical intervertebral disc (IVD) is prone to fatigue damage under long-term vibration loading. The accumulation of damage will lead to degeneration and life reduction of IVD, influencing pilot’s flight training. In this study, a continuum damage mechanics (CDM)-based fatigue damage model was established to describe the fatigue damage of human IVD, based on which the fatigue life of pilot’s neck was predicted. The parameters of the damage evolution model were fitted and calibrated by using the annulus fibrosus fatigue experimental data in vitro and disc degeneration data from general population. Then, the calibrated model considering recovery factors was applied to analyze the effects of flight duration, helmet mass, vibration amplitude and physical exercise on the damage and fatigue life of pilot’s cervical IVD. The degeneration rate of IVD was accelerated and fatigue life was reduced as the increase of flight duration, helmet mass and vibration amplitude, which was consistent with epidemiological research. Physical exercise could promote the damage recovery of IVD and prolong its fatigue life. The calibrated damage evolution model established in this study is effective in life prediction of IVD, which can be applied to assess the novel helmet design and cushion performance of aircraft seats.

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来源期刊

International Journal of Fatigue 工程技术-材料科学：综合

CiteScore

10.70

自引率

21.70%

发文量

619

审稿时长

58 days

期刊介绍： Typical subjects discussed in International Journal of Fatigue address: Novel fatigue testing and characterization methods (new kinds of fatigue tests, critical evaluation of existing methods, in situ measurement of fatigue degradation, non-contact field measurements) Multiaxial fatigue and complex loading effects of materials and structures, exploring state-of-the-art concepts in degradation under cyclic loading Fatigue in the very high cycle regime, including failure mode transitions from surface to subsurface, effects of surface treatment, processing, and loading conditions Modeling (including degradation processes and related driving forces, multiscale/multi-resolution methods, computational hierarchical and concurrent methods for coupled component and material responses, novel methods for notch root analysis, fracture mechanics, damage mechanics, crack growth kinetics, life prediction and durability, and prediction of stochastic fatigue behavior reflecting microstructure and service conditions) Models for early stages of fatigue crack formation and growth that explicitly consider microstructure and relevant materials science aspects Understanding the influence or manufacturing and processing route on fatigue degradation, and embedding this understanding in more predictive schemes for mitigation and design against fatigue Prognosis and damage state awareness (including sensors, monitoring, methodology, interactive control, accelerated methods, data interpretation) Applications of technologies associated with fatigue and their implications for structural integrity and reliability. This includes issues related to design, operation and maintenance, i.e., life cycle engineering Smart materials and structures that can sense and mitigate fatigue degradation Fatigue of devices and structures at small scales, including effects of process route and surfaces/interfaces.