Paper Title:
Numerical Simulation of Explosively Compacted Powder-in-Tube MgB2 Superconductor
  Abstract

High Tc MgB2 superconductors were fabricated using the ex-situ and in-situ powder in tube (PIT) technique. During treatment, the precursor materials were shock consolidated under high strain-rates using PETN as the explosive medium. After compaction, the superconducting properties of the steel-sheathed MgB2 samples were examined by means of magnetization measurements using a SQUID magnetometer. Bean’s critical state model was applied to investigate the critical current density characteristics of the samples at fields up to 5T. The superconducting transition temperature of the specimens was determined by examining the material temperature dependence of magnetisation in zero field cooled (ZFC) and field cooled (FC) states. An assessment of the explosive compaction technique was carried out by simulating the procedure using the LS-DYNA explicit finite element code. The sample is modelled as a porous soil-like material with a customised yield surface. The numerically estimated final product dimensions, porosity and hardness are compared to the experimental results; furthermore, the numerically obtained pressure, temperature and strain rate profiles are used to assess the efficiency of the compaction process for different explosive quantities and powder compositions.

  Info
Periodical
Edited by
S. Itoh, J.J. Yoh and K. Hokamoto
Pages
131-136
DOI
10.4028/www.scientific.net/MSF.673.131
Citation
A. G. Mamalis, I. D. Theodorakopoulos, A. K. Vortselas, "Numerical Simulation of Explosively Compacted Powder-in-Tube MgB2 Superconductor", Materials Science Forum, Vol. 673, pp. 131-136, 2011
Online since
January 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Pu Qing Chen, Wei Xia, Zhao Yao Zhou, Wei Ping Chen, Yuan Yuan Li
Abstract:Metal cutting operations constitute a large percentage of the manufacturing activity. One of the most important objectives of metal cutting...
201
Authors: Christian Ghermec, Olimpia Ghermec, Mario Trotea
Abstract:The elaboration of carbon steels sintered through the enrichment of compactised iron powders in carbon in methane gas medium has allowed the...
113
Authors: Jian Li, Bin Ting Yang
Modeling, Analysis and Simulation of Manufacturing Processes
Abstract:Utilization of MSC.Marc FEM software, the typical warm compaction process of molybdeum powder was simulated. Influence of processing...
524
Authors: Jian Li, Bin Ting Yang
Abstract:Utilization of finite element method (FEM) and warm compaction process, study on mechanical theory and FEM simulation of molybdenum powder...
119
Authors: Guo Ning Si, Chen Lan
Chapter 14: Modelling, Analysis and Simulation
Abstract:The finite element method was conducted to simulate the pharmaceutical powder compression process by using Drucker–Prager Cap model and...
1403