scholarly journals Modelling the Effects of Resin Shrinkage in Pultrusion of Composites Sections

2000 ◽  
Vol 9 (6) ◽  
pp. 096369350000900 ◽  
Author(s):  
Sunil C. Joshi ◽  
Y.C. Lam
Keyword(s):  
Mass Transfer ◽  
Thermal Expansion ◽  
Heat And Mass Transfer ◽  
Material Properties ◽  
Three Dimensional ◽  
Chemical Shrinkage ◽  
Numerical Schemes ◽  
Temperature Dependent ◽  
Effects Of Temperature ◽  
Dimensional Simulation

This paper discusses the development, implementation and application of numerical schemes for modelling the effects of temperature-dependent material properties including chemical shrinkage and thermal expansion of resin on the curing of thermosetting composites in pultrusion. The results of the three-dimensional simulation of heat and mass transfer in pultrusion of regular as well as irregular and hollow sections are presented.

Size- and temperature-dependent Young's modulus and size-dependent thermal expansion coefficient of thin films

2016 ◽  
Vol 18 (31) ◽  
pp. 21508-21517 ◽  
Author(s):  
Xiao-Ye Zhou ◽  
Bao-Ling Huang ◽  
Tong-Yi Zhang
Keyword(s):  
Thin Films ◽  
Thermal Expansion ◽  
Young’S Modulus ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
Material Properties ◽  
Essential Role ◽  
Young's Modulus ◽  
Temperature Dependent ◽  
Size Dependent

Surfaces of nanomaterials play an essential role in size-dependent material properties.

First Steps Towards the Development of a 3D Nuclear Fuel Behavior Solver With OpenFOAM

2018 ◽  
Author(s):  
Alessandro Scolaro ◽  
Ivor Clifford ◽  
Carlo Fiorina ◽  
Andreas Pautz
Keyword(s):  
Nuclear Fuel ◽  
Material Properties ◽  
Three Dimensional ◽  
Small Strain ◽  
Theoretical Background ◽  
Transfer Model ◽  
Temperature Dependent ◽  
Reactor Physics ◽  
Radial Temperature ◽  
Fuel Behavior

A new 3D fuel behavior solver is currently under collaborative development at the Laboratory for Reactor Physics and Systems Behaviour of the École Polytechnique Fédérale de Lausanne and at the Paul Scherrer Institut. The long term objective is to enable a more accurate simulation of inherently 3D safety-relevant phenomena which affect the performance of the nuclear fuel. The current implementation is a coupled three-dimensional heat conduction and linear elastic small strain solver, which models the effects of burnup- and temperature dependent material properties, swelling, relocation and gap conductance. The near future developments will include the introduction of a smeared pellet cracking model and of material inleasticities, such as creep and plasticity. After an overview of the theoretical background, equations and models behind the solver, this work focuses on the recent preliminary verification and validation efforts. The radial temperature and stress profiles predicted by the solver for the case of an infinitely long rod are compared against their analytical solution, allowing the verification of the thermo-mechanics equations and of the gap heat transfer model. Then, an axisymmetric model is created for 4 rods belonging to the Halden assembly IFA-432. These models are used to predict the fuel centerline temperature during power ramps recorded at the beginning of life, when the fuel rod performance is still not affected by more complex high burnup effects. Finally, the predictions are compared with the experimental measurements coming from the IFPE database. This first preliminary results allow a careful validation of the temperature-dependent material properties and of the gap conductance models.

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