Influence of creep on preload relaxation of bolted composite joints: Modeling and numerical simulation

Xie, Yuanhong; Xiao, Yi; Lv, Jiaxin; Zhang, Zhen; Zhou, Yue‐Ting; Xue, Yuande

doi:10.1016/j.compstruct.2020.112332

Cited by 22 publications

(7 citation statements)

References 20 publications

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“…Stress relaxation refers to the phenomenon that bolt materials creep under high temperatures and stress conditions lower than yield strength, and the elastic strain ( e  ) slowly transforms into creep strain ( c  ) over time, resulting in the attenuation of bolt axial force. It is found that the influence of material creep on bolt self-loosening under high temperatures is dominant [6] - [10] .…”

Section: Stress Relaxation Occurs In Bolts Under High Temperatures An...mentioning

confidence: 99%

Cause Analysis and Theoretical Study of Bolt Self-loosening Under a High-temperature Condition

Ding

Cheng

et al. 2023

J. Phys.: Conf. Ser.

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With the wide application of bolt connection, the application environment of the bolt is more and more complicated. The problem of bolt loosening caused by high temperatures cannot be ignored. Based on the research status of domestic and foreign experts, this paper analyzes the causes of high-temperature bolt loosening and introduces theoretical research on this problem. The conclusion is drawn that the factors affecting bolt loosening under high-temperature conditions and the anti-loosening measures are put forward.

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Section: Stress Relaxation Occurs In Bolts Under High Temperatures An...mentioning

confidence: 99%

Cause Analysis and Theoretical Study of Bolt Self-loosening Under a High-temperature Condition

Ding

Cheng

et al. 2023

J. Phys.: Conf. Ser.

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“…As marked recently [195], there is nothing more fundamental in nonlinear mechanics of anisotropic materials with tension-compression asymmetry than the constitutive framework [191][192][193][194] developed in the early 1980s. Furthermore, such constitutive framework was used in [196][197][198][199][200][201][202][203][204][205][206][207] for modeling of the natural and artificial materials, however, without referencing sources [191][192][193][194].…”

Section: Interpretation Of Afm Nanoindentation Measurements For Spher...mentioning

confidence: 99%

Quantum, molecular and continuum modeling in nonlinear mechanics of viruses

Zolochevsky¹,

Parkhomenko²,

Мартыненко

2022

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Introdution. Viruses are a large group of pathogens that have been identified to infect animals, plants, bacteria and even other viruses. The 2019 novel coronavirus SARS-CoV-2 remains a constant threat to the human population. Viruses are biological objects with nanometric dimensions (typically from a few tens to several hundreds of nanometers). They are considered as the biomolecular substances composed of genetic materials (RNA or DNA), protecting capsid proteins and sometimes also of envelopes. Objective. The goal of the present review is to help predict the response and even destructuration of viruses taking into account the influence of different environmental factors, such as, mechanical loads, thermal changes, electromagnetic field, chemical changes and receptor binding on the host membrane. These environmental factors have significant impact on the virus. Materials and methods. The study of viruses and virus-like structures has been analyzed using models and methods of nonlinear mechanics. In this regard, quantum, molecular and continuum descriptions in virus mechanics have been considered. Application of single molecule manipulation techniques, such as, atomic force microcopy, optical tweezers and magnetic tweezers has been discussed for a determination of the mechanical properties of viruses. Particular attention has been given to continuum damage–healing mechanics of viruses, proteins and virus-like structures. Also, constitutive modeling of viruses at large strains is presented. Nonlinear elasticity, plastic deformation, creep behavior, environmentally induced swelling (or shrinkage) and piezoelectric response of viruses were taken into account. Integrating a constitutive framework into ABAQUS, ANSYS and in-house developed software has been discussed. Conclusion. Link between virus structure, environment, infectivity and virus mechanics may be useful to predict the response and destructuration of viruses taking into account the influence of different environmental factors. Computational analysis using such link may be helpful to give a clear understanding of how neutralizing antibodies and T cells interact with the 2019 novel coronavirus SARS-CoV-2.

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“…(2014) found the change law of flange thickness on bolt pretightening force loss based on the creep study of gasket, and proposed a new mathematical model to predict the pretightening force loss caused by gasket creep. Xie et al. (2020) studied the influence of the interaction caused by the creep of composite material and the contact creep of rough surface on the relaxation of bolt pretightening force and established the creep constitutive model of composite material.…”

Section: Introductionmentioning

confidence: 99%

“…For the bolt pretightening force loss caused by gasket creep relaxation, Housari et al (2012) and Mao et al (2014) found the change law of flange thickness on bolt pretightening force loss based on the creep study of gasket, and proposed a new mathematical model to predict the pretightening force loss caused by gasket creep. Xie et al (2020) studied the influence of the interaction caused by the creep of composite material and the contact creep of rough surface on the relaxation of bolt pretightening force and established the creep constitutive model of composite material. The results showed that the performance of the connection system could be improved by controlling the surface topography of the joint surface.…”

Section: Introductionmentioning

confidence: 99%

General prediction model of residual pretightening force of bolt group with one-step and multi-step pretightening and analysis of influencing factors from the perspective of elastic interaction

Pan

Sun

et al. 2023

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PurposeThe purpose is to predict the distribution of the residual pretightening force of the bolt group under the action of any initial pretightening force, and to achieve the final residual pretightening force as the target to solve the initial pretightening force value to be applied.Design/methodology/approachBased on the finite element method and the elastic interaction theory between bolt group, this paper establishes a prediction model for the residual pretightening force distribution of bolt group for one-step pretightening and multi-step pretightening of gasketless flange connection systems. In addition, using the general modeling method given in this paper, the prediction model of residual pretightening force of long plate bolt connection system is established, and compared with reference, which fully proves the effectiveness and universality of the general prediction model of residual pretightening force of bolt group.FindingsThe appropriate pretightening sequence, increasing the number of pretightening steps and variable amplitude loading can effectively reduce the influence of elastic interaction and improve the uniformity of residual pretightening force of the bolt group. And the selection of material, number of bolts and connected thickness of bolt connection system also has a great influence on the distribution of residual pretightening force of bolt groups.Originality/valueThe general prediction model for the residual pretightening force of bolt group of connecting structural components considering elastic interaction given in this paper can provide a reference for the design and optimization of the bolt assembly process of the rotor system and the casing system in aero-engine and the prediction of the performance of the connecting system.

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Influence of creep on preload relaxation of bolted composite joints: Modeling and numerical simulation

Cited by 22 publications

References 20 publications

Cause Analysis and Theoretical Study of Bolt Self-loosening Under a High-temperature Condition

Cause Analysis and Theoretical Study of Bolt Self-loosening Under a High-temperature Condition

Quantum, molecular and continuum modeling in nonlinear mechanics of viruses

General prediction model of residual pretightening force of bolt group with one-step and multi-step pretightening and analysis of influencing factors from the perspective of elastic interaction

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