Thermomechanical coupling effect of PVC sheet with defects

To ensure the structural safety and reliability of coal mine rescue capsule in disastrous surroundings after gas explosion, in this paper, the thermomechanical coupling effect on a certain structure subjected to gas explosion was analyzed, and then a novel rescue capsule with a combination of radius and square features was designed according to the underground surroundings and relevant regulations on mine rescue devices. Foremost, the coupling mechanism of thermal-fluid-solid interaction between gas explosion shock wave and rescue capsule and the thermal dynamic response of the capsule subjected to explosion load of gas/air mixture was investigated and revealed by employing LS-DYNA. The variation laws and characteristics of stress field, displacement field, and temperature field of the capsule were analyzed based on the simulation results. Results show that the structural safety, tightness, and reliability of the capsule meet the requirements of the national safety regulations. The design method presented in this work provides a new thought for design of coal mine rescue capsule.

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Thermomechanical coupling effect of graphite electrodes upon the electric arc furnace dynamics

Meccanica ◽

10.1007/s11012-014-0023-x ◽

2014 ◽

Vol 49 (12) ◽

pp. 2979-2990 ◽

Cited By ~ 3

Author(s):

Eugenio Brusa

Keyword(s):

Coupling Effect ◽

Electric Arc Furnace ◽

Electric Arc ◽

Thermomechanical Coupling ◽

Arc Furnace ◽

Graphite Electrodes

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Dynamic Instability of a Cantilever Column Subjected to a Follower Force Including Thermomechanical Coupling Effect

Journal of Applied Mechanics ◽

10.1115/1.3408963 ◽

1971 ◽

Vol 38 (4) ◽

pp. 839-846 ◽

Cited By ~ 19

Author(s):

R. C. Shieh

Keyword(s):

Boundary Value Problem ◽

Boundary Conditions ◽

Critical Loads ◽

Dynamic Instability ◽

Coupling Effect ◽

Follower Force ◽

Thermomechanical Coupling ◽

Damping Coefficients ◽

Critical Dynamic ◽

Linear Thermoelasticity

Within the context of the linear thermoelasticity theory, including thermomechanical coupling effect, the dynamic instability of equilibrium of an elastic cantilever column subjected to a follower-type force at its free end is studied. The surfaces of the column are either kept at constant temperature (isothermal) or thermally insulated (adiabatic). The boundary-value problem is first formulated, and then it is solved in general and in particular for the depth-length ratio much less than unity. Numerical results for the critical loads are given for various values of the thermal parameters. It is shown that, for a tangential follower force, the critical dynamic (oscillatory) instability load may be reduced through the coupling effect to approximately one half of that of the corresponding uncoupled isothermal problem (which was solved by Beck [14] in 1952). Analytical results are also obtained for the damping coefficients for both adiabatic and isothermal boundary conditions. From a comparison with available experiment for aluminum, it appears that material damping, at least for this material, is almost entirely due to thermomechanical coupling.

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On an Axisymmetric Coupled Thermal Stress Problem in a Finite Circular Cylinder

Journal of Applied Mechanics ◽

10.1115/1.3166977 ◽

1983 ◽

Vol 50 (1) ◽

pp. 116-122 ◽

Cited By ~ 8

Author(s):

Y. Takeuti ◽

R. Ishida ◽

Y. Tanigawa

Keyword(s):

Thermal Stress ◽

Circular Cylinder ◽

Thermal Stresses ◽

Coupling Effect ◽

Three Dimensions ◽

Thermomechanical Coupling ◽

Coupling Term ◽

Wide Range ◽

A New Technique ◽

Transient Thermal

This paper presents a general treatment of the transient thermal stresses of a finite circular cylinder with consideration of the thermomechanical coupling effect using a new technique. The method used is quite useful for the solution of a wide range of transient thermal stress problems in two or three dimensions. From numerical results, we can find that there is a clear effect on the thermal stress distribution when the coupling term is taken into account.

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TMF of Directionally Solidified and Single Crystal Superalloy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.233-235.2227 ◽

2011 ◽

Vol 233-235 ◽

pp. 2227-2230

Author(s):

Qing Wu Wang ◽

Shi Hui Zhang ◽

Mao Pang

Keyword(s):

Single Crystal ◽

Fatigue Damage ◽

Evaluation Method ◽

Mechanical Response ◽

Coupling Effect ◽

Damage Model ◽

Equivalent Strain ◽

Single Crystal Superalloy ◽

Thermomechanical Coupling ◽

Directionally Solidified

Directional solidification and single crystal technology reduces material defects, improves material mechanical property and improves resistances to the high temperature fatigue, creep and corrosion. Accumulation of fatigue damage is a method of life prediction analysis and many fatigue damage models are proposed. Based on foregone research achievements, this paper presents a fatigue damage model, which could reflect material anisotropy and thermomechanical coupling effect. Based on equivalent strain, a fatigue damage evaluation method of directionally solidified and single crystal superalloy is presented and by this method, the linear fit of published fatigue experiment data is proceeded. Directionally solidified and single crystal superalloy is of strong anisotropy and crystal orientation has strong effect on component mechanical response. Comparative life of different location on component could be analyzed.

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The Influence of Thermomechanical Coupling on the Behaviour of Athick-Walled Metallic Tube Subjected to Internal Pressure

International Journal of Applied Mechanics and Engineering ◽

10.2478/ijame-2018-0041 ◽

2018 ◽

Vol 23 (3) ◽

pp. 751-766

Author(s):

Z. Śloderbach

Keyword(s):

Plastic Deformation ◽

Heat Flow ◽

Residual Stresses ◽

Internal Pressure ◽

Coupling Effect ◽

Applied Pressure ◽

Thermomechanical Coupling ◽

Stored Energy ◽

Adiabatic Processes ◽

Elastic Unloading

Abstract In this study, the influence of thermomechanical coupling effect - the effect of thermal expansion due to dissipation of the energy of plastic deformation, with and without taking into account the stored energy of plastic deformation (SEPD) for the distribution of stresses, strains, temperature, the applied pressure and the residual stresses is examined. The residual stresses remain in a thick-walled tube (a cylindrical thick-walled tank) after removing the internal pressure in the process of purely elastic unloading. The analysis is made on the example of an analitycal solution for a thick-walled tube subjected to a quasistatically increasing internal pressure for the case of adiabatic processes (without heat flow). Since the loading with internal pressure is quasi-static (monotonic), then neglecting the process of heat flow can lead to some different results in calculated stresses, deformations, temperature, internal pressure and residual stresses. The calculations for isothermal type of processes of deformations (without heat or ideal cooling) are also performed for the estimation of these differences. The results calculated for the process with heat flow should be intermediate between the values obtained for isothermal and adiabatic processes.

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