Numerical simulation of planar entry flow for a polyisobutylene solution using an integral constitutive equation

1993 ◽  
Vol 37 (6) ◽  
pp. 1029-1040 ◽  
Author(s):  
E. Mitsoulis
Keyword(s):  
Numerical Simulation ◽  
Constitutive Equation ◽  
Integral Constitutive Equation

Comprehensive Numerical Simulation of Stress and Damage Fields under Thermo-Mechanical Loading for TBC-Coated Ni-Based Superalloy

2018 ◽  
Vol 774 ◽  
pp. 137-142 ◽  
Author(s):  
Hiroaki Katori ◽  
Masayuki Arai ◽  
Kiyohiro Ito
Keyword(s):  
Numerical Simulation ◽  
Constitutive Equation ◽  
Thermal Barrier Coatings ◽  
Peak Stress ◽  
Thermal Barrier ◽  
High Temperature Creep ◽  
Wave Loading ◽  
Element Analysis ◽  
Barrier Coatings ◽  
Start Up

A finite element analysis code was developed to accurately predict stress and damage fields in thermal barrier coatings (TBCs) systems subjected to thermo-mechanical loadings. An inelastic constitutive equation for TBCs, and a Chaboche-type viscoplastic constitutive equation for Ni-based super alloys (IN738LC) were employed to simulate high temperature creep and cyclic deformation. Simulations of the TBC/IN738LC system subjected to two types of loading, namely, a triangle-wave loading and a GT-operation loading, were performed using the developed analysis code. The results confirmed that the stress and damage fields in the TBC/IN738LC system could be simulated accurately, and provided us with credible results regarding the crack occurrence. Additionally, the analysis under the GT-operation loading conditions revealed that a peak stress generated during the start-up operation would lead to delamination of the TBC, while a peak stress at the shut-down would lead to cracking in the substrate.

A Single‐Integral Constitutive Equation

1969 ◽  
Vol 13 (1) ◽  
pp. 103-109 ◽  
Author(s):  
Alden H. Emery ◽  
Michael L. White
Keyword(s):  
Constitutive Equation ◽  
Single Integral ◽  
Integral Constitutive Equation

Structure of Flows in Viscoplastic Fluids Mixing

2002 ◽  
Author(s):  
Fre´de´ric Savreux ◽  
Pascal Jay ◽  
Albert Magnin ◽  
Jean-Michel Piau
Keyword(s):  
Numerical Simulation ◽  
Free Surface ◽  
Finite Elements ◽  
Constitutive Equation ◽  
Power Consumption ◽  
Viscoplastic Fluid ◽  
Two Dimensional ◽  
Cylindrical Tank ◽  
Stream Lines ◽  
Isothermal Mixing

The laminar isothermal mixing of a viscoplastic fluid is considered in the absence of any free surface and when the material can be modelled using a Bingham constitutive equation. The material is mixed by a rotating cylindrical tank and a fixed anchor impeller. A two-dimensional numerical simulation is performed with a finite elements method. The effects of viscoplasticity and inertia are related to an Oldroyd (Od) and to a Reynolds (Re) number. Stream lines, vortices, yield surfaces and power consumption are shown and analysed depending on the value of Od and Re parameters.

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