scholarly journals A stiffness degradation model of bolted joint based on fourth polynomial pressure distribution

AIP Advances ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 125317
Author(s):  
Sheng’ao Wang ◽  
Min Zhu ◽  
Zijian Xu ◽  
Fei Wu ◽  
Biao Li ◽  
...  
Keyword(s):  
Pressure Distribution ◽  
Stiffness Degradation ◽  
Bolted Joint ◽  
Degradation Model

An investigation into contact pressure distribution in bolted joints

2014 ◽  
Vol 228 (18) ◽  
pp. 3405-3418 ◽  
Author(s):  
JT Stephen ◽  
MB Marshall ◽  
R Lewis
Keyword(s):  
Pressure Distribution ◽  
Contact Pressure ◽  
Applied Load ◽  
Plate Thickness ◽  
Operating Conditions ◽  
Bolted Joints ◽  
Bolted Joint ◽  
Contact Pressure Distribution ◽  
Engineering Structures ◽  
Peak Value

Bolted joints are widely used in modern engineering structures and machine designs due to their low cost and reliability when correctly selected. Their integrity depends on quantitative representation of the contact pressure distribution at the interface during design. Because of the difficulty in reaching and assessing clamped interfaces with traditional experimental methods, presently bolted joint design and evaluation is based on theoretical analysis, with assumptions to quantify pressure distribution at the clamped interface, which may not represent their true operating conditions. The present work utilises a non-intrusive ultrasonic technique to investigate and quantify the pressure distribution in bolted joints. The effect of variation in plate thickness on the contact pressure distribution at bolted interfaces under varying axial loads is investigated. While it was observed that the contact pressure at the interface increases as the applied load increases, the distance from the edge of the bolt hole at which the distribution becomes stable is independent of the applied load on the bolted joint. However, the contact pressure distribution was observed to vary with the plate thickness. Although the variation in the peak value of the average contact pressure distribution in bolted joints does not depend on the plate thickness, the distance from the edge of bolt hole at which the value of the distribution becomes stable increases as the plate thickness is increased. It was also observed that the edge of the bolt head affected the position of the peak value of the contact pressure distribution at the interface, though its effect was dependent on plate thickness. Furthermore, a model based on a Weibull distribution has been proposed to fit the experimental data and a good correlation was observed.

Statistical Model for Pressure Distribution of a Bolted Joint

2008 ◽  
Author(s):  
Eliete Pereira ◽  
Marcia Mantelli ◽  
Fernando Milanez ◽  
Leroy Fletcher
Keyword(s):  
Statistical Model ◽  
Pressure Distribution ◽  
Bolted Joint

A novel creep-fatigue stiffness degradation model for composite materials

2020 ◽  
Vol 237 ◽  
pp. 111955 ◽  
Author(s):  
Seyed Sina Samareh-Mousavi ◽  
Fathollah Taheri-Behrooz
Keyword(s):  
Composite Materials ◽  
Stiffness Degradation ◽  
Degradation Model ◽  
Creep Fatigue

Behavior of Interface Pressure Distribution in a Single Bolt-Flange Assembly Subjected to Heat Flux

1992 ◽  
Vol 114 (2) ◽  
pp. 231-236 ◽  
Author(s):  
S. Itoh ◽  
Y. Shiina ◽  
Y. Ito
Keyword(s):  
Heat Flux ◽  
Thermal Behavior ◽  
Pressure Distribution ◽  
Thermal Loading ◽  
Thermal Contact ◽  
Bolted Joint ◽  
Interface Pressure ◽  
Short Period ◽  
Series Of Experiments ◽  
Axial Heat

This paper describes the thermal behavior of a single bolt-flange assembly, emphasizing the correlation between the thermal contact resistance, thermal deformation of joint surroundings and interface pressure distribution, i.e., mechanically-thermally closed loop effect. Through a series of experiments, the major findings are as follows: (1) The thermal behavior of the bolted joint is dependent upon the sinusoidal-like distribution of the interface pressure, for instance, it showing the additional heat flow in radial direction under the axial heat flux. (2) The bolted joint with ordinarily geometric specification is in thermal stability except for a short period after thermal loading.

Numerical Simulation of Unidirectional Hoop Composite Laminates under Flexural Loads

2007 ◽  
Vol 334-335 ◽  
pp. 217-220
Author(s):  
Li Li Tong ◽  
Zhen Qing Wang ◽  
Bao Hua Sun
Keyword(s):  
Numerical Simulation ◽  
Composite Laminates ◽  
Calculated Result ◽  
Composite Laminate ◽  
Stiffness Degradation ◽  
Test Results ◽  
Degradation Model ◽  
Compressive Stresses

Numerical simulation for unidirectional hoop composite laminates under flexural loads was finished. The change of tensile and compressive stresses, the position of local crush and delamination and stiffness degradation were analyzed with parametric program compiled by APDL language in ANSYS. The results showed that composite laminate could bear the load continually after local crush and delamination. Displacements of calculated result with stiffness degradation model matched test results well.

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