Computational Characterization of Micro- to Macroscopic Deformation Behavior of Amorphous, Crystalline, and Semicrystalline Polyethylene

2005 ◽  
Vol 3 (2) ◽  
pp. 149-160 ◽  
Author(s):  
Yoshihiro Tomita ◽  
Makoto Uchida
Keyword(s):  
Deformation Behavior ◽  
Macroscopic Deformation

About Puncture Testing Applied for Mechanical Characterization of Fetal Membranes

2014 ◽  
Vol 136 (11) ◽  
Author(s):  
Wilfried Bürzle ◽  
Edoardo Mazza ◽  
John J. Moore
Keyword(s):  
Deformation Behavior ◽  
Mechanical Characterization ◽  
Ex Vivo ◽  
Fetal Membrane ◽  
Membrane Rupture ◽  
Resistance To Deformation ◽  
Ex Vivo Testing ◽  
Insight Into

Puncture testing has been applied in several studies for the mechanical characterization of human fetal membrane (FM) tissue, and significant knowledge has been gained from these investigations. When comparing results of mechanical testing (puncture, inflation, and uniaxial tension), we have observed discrepancies in the rupture sequence of FM tissue and significant differences in the deformation behavior. This study was undertaken to clarify these discrepancies. Puncture experiments on FM samples were performed to reproduce previous findings, and numerical simulations were carried out to rationalize particular aspects of membrane failure. The results demonstrate that both rupture sequence and resistance to deformation depend on the samples' fixation. Soft fixation leads to slippage in the clamping, which reduces mechanical loading of the amnion layer and results in chorion rupturing first. Conversely, the stiffer, stronger, and less extensible amnion layer fails first if tight fixation is used. The results provide a novel insight into the interpretation of ex vivo testing as well as in vivo membrane rupture.

The High Temperature Deformation Behavior of A Cr2Nb Ordered Intermetallic System

1990 ◽  
Vol 213 ◽  
Author(s):  
G. E. Vignoul ◽  
J.M. Sanchez ◽  
J. K. Tien
Keyword(s):  
Deformation Behavior ◽  
Elevated Temperatures ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Deformation Law ◽  
Ordered Intermetallic ◽  
Intermetallic System ◽  
Increasing Temperature ◽  
Stress Term

ABSTRACTA basic characterization of the deformation behavior of Cr2Nb by microindention at ambient and elevated temperatures (up to 1400 °C) was undertaken. The microhardness of this system was seen to decrease with increasing temperature, from 1040 MPa at 25°C to 322 MPa at 1400 °C. Further, the microindention creep behavior of this system was studied by varying time on load at T = 1000 and 1200°C. Analysis of the data showed that m = 24 and Qapp = 477.61 kJ/mole. These unusually high values are indicative of the existence of an effective resisting stress against creep. When the data was fit against a microindention creep deformation law which was modified to incorporate an effective resisting stress term, it was determined that m = 4.5, Qcreep = 357 kJ/mole and the resisting stress term σr = 300 MPa.

Characterization of hot deformation behavior of Al-Zn-Mg-Mn-Zr alloy during compression at elevated temperature

2017 ◽  
Vol 24 (3) ◽  
pp. 515-520 ◽  
Author(s):  
Jie Yan ◽  
Qing-lin Pan ◽  
Xiang-kai Zhang ◽  
Xue Sun ◽  
An-de Li ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Hot Deformation ◽  
Deformation Behavior ◽  
Hot Deformation Behavior ◽  
Zr Alloy

scholarly journals Characterization of Impact Deformation Behavior of a Thermally Aged Duplex Stainless Steel by EBSD

2018 ◽  
Vol 31 (8) ◽  
pp. 798-806 ◽  
Author(s):  
Gang Liu ◽  
Shi-Lei Li ◽  
Hai-Long Zhang ◽  
Xi-Tao Wang ◽  
Yan-Li Wang
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Deformation Behavior ◽  
Impact Deformation
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