Bolted Joint Interface Pressure for Thermal Contact Resistance

One of the parameters needed to calculate the thermal contact resistance across a bolted joint is the interface pressure distribution between the plates of the joint [1, 2]. As part of a study [3] on thermal joint conductance, a three-dimensional photoelastic analysis using the stress freezing technique was used to predict the interface pressure. Nine bolted joint geometries were investigated using smooth flat plates of photoelastic material and equal thickness. The resulting interface pressure distributions which are presented are sufficiently accurate for the calculation of thermal contact resistance.

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Interface pressure distributions and thermal contact resistance of a bolted joint

Proceedings of The Royal Society A Mathematical Physical and Engineering Sciences ◽

10.1098/rspa.2005.1452 ◽

2005 ◽

Vol 461 (2060) ◽

pp. 2339-2354 ◽

Cited By ~ 13

Author(s):

M Tirovic ◽

G.P Voller

Keyword(s):

Cast Iron ◽

Contact Resistance ◽

Thermal Contact Resistance ◽

Thermal Contact ◽

Conductive Heat ◽

Bolted Joint ◽

Interface Pressure ◽

Pressure Distributions ◽

Area Of Interest ◽

Wide Range

The paper studies interface pressure distributions and thermal contact resistance (TCR) of a large automotive bolted joint. The research was initiated by the need to determine accurately conductive heat dissipation from a commercial vehicle disc brake. The main area of interest was the conduction between the grey cast iron disc and the spheroidal graphite cast iron wheel carrier. The bolt clamp forces and interface pressure distributions were investigated theoretically and experimentally. Finite-element analyses and pressure-sensitive paper experiments provided very similar interface pressure distributions. TCR change with interface pressure was studied experimentally, by conducting numerous temperature measurements. The derived linear relationship is of generic nature, enabling the calculation of the TCR for a variety of engineering bolted joints, over a wide range of interface pressures.

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Contribution to the Study of Solid-Solid Thermal Contact Resistances--A Comparative Study

Annales de Chimie Science des Matériaux ◽

10.18280/acsm.450401 ◽

2021 ◽

Vol 45 (4) ◽

pp. 267-272

Author(s):

Rahmouna Cheriet ◽

Bourassia Bensaad ◽

Fatiha Bouhadjela ◽

Soufyane Belhenini ◽

Mohammed Belharizi

Keyword(s):

Contact Resistance ◽

Contact Pressure ◽

Mixed Method ◽

Thermal Contact Resistance ◽

Low Cost ◽

Thermal Contact ◽

Three Dimensional ◽

Empirical Models ◽

Three Dimensional Finite Element ◽

Semi Empirical

This study presents a mixed numerical / semi-empirical approach that primarily aimed to estimate the thermal contact resistance between two solids. The results obtained by this mixed method were compared and validated by experimental measurements of this resistance. Three semi-empirical models were used, namely the Mikic model, the Yovanovich model and the Antonetti model. The three-dimensional finite element numerical simulation was used to estimate the contact pressure between the two solids. Then this contact pressure obtained numerically was compared to the hardness of the solids in contact. The findings indicated that the numerically obtained contact pressures were close to hardness. Therefore, the hardness, which is usually used as an input variable in semi-empirical models, was replaced by the contact pressure. The thermal contact resistance obtained by this mixed method was then compared with the experimental one. The outcomes obtained from this comparison turned out to be very conclusive and can therefore be used to reinforce our approach which can actually be viewed as a reliable and low-cost method for estimating the thermal contact resistance between solids in contact.

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Finite Element Simulation of the Tightening Process of Bolted Joint With a Bolt Heater

Journal of Pressure Vessel Technology ◽

10.1115/1.1493205 ◽

2002 ◽

Vol 124 (4) ◽

pp. 457-464 ◽

Cited By ~ 7

Author(s):

Toshimichi Fukuoka ◽

Quantuo Xu

Keyword(s):

Finite Element ◽

Contact Resistance ◽

Finite Element Simulation ◽

Thermal Contact Resistance ◽

Thermal Contact ◽

Numerical Approach ◽

Numerical Analyses ◽

Bolted Joint ◽

Skilled Workers ◽

Element Simulation

The tightening operation with a bolt heater has advantages surpassing those of other tightening methods. Currently, a bolt heater is mainly applied to tighten huge bolts that cannot be clamped by other means, and the tightening operation is usually supported by the expertise of skilled workers. In this paper, a numerical approach is presented to aim at a broader use of bolt heater technique by elucidating the tightening mechanism. The effects of thermal contact resistance existing around a bolted joint are taken into account for a better accuracy in the numerical analyses. Based on the numerical results obtained, a series guideline to help the tightening operation when performed by less skilled workers is proposed.

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A THREE DIMENSIONAL LATTICE BOLTZMANN MODEL FOR SOLVING HEAT TRANSFER PROBLEMS WITH THERMAL CONTACT RESISTANCE

JP Journal of Heat and Mass Transfer ◽

10.17654/hm015030643 ◽

2018 ◽

Vol 15 (3) ◽

pp. 643-651

Author(s):

Oussama El Mhamdi ◽

Elalami Semma

Keyword(s):

Heat Transfer ◽

Contact Resistance ◽

Lattice Boltzmann ◽

Thermal Contact Resistance ◽

Thermal Contact ◽

Three Dimensional ◽

Lattice Boltzmann Model ◽

Dimensional Lattice ◽

Transfer Problems ◽

Boltzmann Model

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An equivalent temperature model of three-dimensional steady heat conduction analysis for a fiber metal laminated plate coated with a thermal barrier

Thermal Science ◽

10.2298/tsci190704445g ◽

2019 ◽

pp. 445-445

Author(s):

Ninghua Gao ◽

Junwei Lian ◽

Zhaohui Xu ◽

Haojie Jiang

Keyword(s):

Contact Resistance ◽

Thermal Contact Resistance ◽

Thermal Contact ◽

Three Dimensional ◽

Thermal Barrier ◽

Temperature Model ◽

Equivalent Temperature ◽

Fiber Metal ◽

Steady Heat Conduction ◽

Steady Heat

In this paper, an equivalent temperature model of three-dimensional steady heat conduction analysis for a fiber metal laminated plate coated with a thermal barrier (CFML) is presented. The separate variable method (SVM) and equivalent temperature (ET) method are applied comprehensively to solve the temperature field at the interface between the thermal barrier and top aluminum 2024-T3 layer for the fiber metal laminated (FML) structure firstly, and values of other layers? temperature and thermal contact resistance are obtained based on balance principle of heat flux between respective adjacent top and bottom layers subsequently. The aim of this research is to understand the influences of kinds of fiber species, numbers of FML layers, thickness ratio between total CFML structure and thermal barrier as well as temperature distributed function on the values of thermal contact resistance between respective adjacent layers and temperature distribution from top to bottom surfaces for the CFML structure. Especially, the ratio of thermal contact resistance between maximum and minimum values are about 5 times no matter considering one or two kinds of fiber species. Besides the present results (mainly geometrical and physical parameters? effect) could guide engineers designing the CFML structures to adapt to high-temperature environment especially aerospace temperature environment.

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