Determination of the Bardeen–Cooper–Schrieffer material parameters of the HIE-ISOLDE superconducting resonator

Recently, the Rapid Prototyping technology (RP hereafter) has been increasingly used for a final product, which requires detailed knowledge of designing parts made by the RP technology. In order to apply parts made by the RP technology in robotics, and design in general, in a wider range, one of the most important material parameters is their bend strength. The paper describes an experimental determination of bend strength in parts printed on a 3D printer. The parts were made of polycarbonate. The tests were carried out in parts with various types of internal structure. The achieved results can be implemented when designing parts made by 3D printing provided that professional printers are used.

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An Improved Method of Determining the Disturbed State Concept Model Parameters

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.919-921.1345 ◽

2014 ◽

Vol 919-921 ◽

pp. 1345-1349

Author(s):

Wei Lu ◽

Jia Jun Pan

Keyword(s):

Triaxial Compression ◽

Model Parameters ◽

Improved Method ◽

Stress Strain ◽

Material Parameters ◽

Concept Model ◽

Strain Relation ◽

Stress Strain Relation ◽

Disturbed State Concept

The method of postulate of relatively intact model in the disturbed concept model is reached. Because it is more difficult to assume relatively intact curve by observed experimental data, a method which could automatically calculate the stress strain relation curve of relative intact by triaxial compression test data is raised, so that the determination of material parameters becomes easier, and the improved method is verified by numerical calculation. The results show that this method can effectively determine the stress strain relation curve of relative intact.

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A Three-Phase Constitutive Model for TiNiNb Shape Memory Alloys

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.97-101.660 ◽

2010 ◽

Vol 97-101 ◽

pp. 660-666

Author(s):

Jun Wang ◽

Zhi Ming Hao ◽

Ping An Shi ◽

Shao Rong Yu ◽

Wei Fen Li

Keyword(s):

Phase Transition ◽

Constitutive Model ◽

Shape Memory Alloys ◽

Shape Memory ◽

Shape Memory Effect ◽

Conventional Theory ◽

Material Parameters ◽

Three Phase ◽

The Individual

A three-phase constitutive model for TiNiNb shape memory alloys (SMAs) is proposed based on the fact that TiNiNb SMAs are dynamically composed of austenite, martensite and -Nb phases. In the considered ranges of stress and temperature, the behaviors of austenite, martensite and -Nb phases are assumed to be elastoplastic, and the behavior of an SMA is regarded as the dynamic combination of the individual behavior of each phase. Then a macroscopic constitutive description for TiNiNb SMAs is obtained by the conventional theory of plasticity, the theory of mixture, the theory of inclusion, and the description of phase transition by Tanaka. The method for determination of the material parameters is given. This constitutive model can describe the main characteristics of SMAs, such as ferrcelasticity, pseudoelasticity and shape memory effect.

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Numerical Determination of Two-Phase Material Parameters of a Gas Diffusion Layer Using Tomography Images

Journal of Fuel Cell Science and Technology ◽

10.1115/1.2821600 ◽

2008 ◽

Vol 5 (2) ◽

Cited By ~ 62

Author(s):

Jürgen Becker ◽

Volker Schulz ◽

Andreas Wiegmann

Keyword(s):

Diffusion Layer ◽

Gas Diffusion Layer ◽

Gas Diffusion ◽

Pore Morphology ◽

Two Phase ◽

Material Parameters ◽

3D Tomography ◽

Tomography Image ◽

Parameter Values

In this paper, we give a complete description of the process of determining two-phase material parameters for a gas diffusion layer: Starting from a 3D tomography image of the gas diffusion layer the distribution of gas and water phases is determined using the pore morphology method. Using these 3D phase distributions, we are able to determine permeability, diffusivity, and heat conductivity as a function of the saturation of the porous medium with comparatively low numerical costs. Using a reduced model for the compression of the gas diffusion layer, the influence of the compression on the parameter values is studied.

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