Deformation and Failure Mechanisms of Thermoelectric Type-I Clathrate Ba8Au6Ge40

2022 ◽  
Author(s):  
Xiaolian Zhang ◽  
Pengcheng Zhai ◽  
Xiege Huang ◽  
Sergey I. Morozov ◽  
Bo Duan ◽  
...  
Keyword(s):  
Failure Mechanisms ◽  
Type I ◽  
Deformation And Failure

Deformation and Failure Mechanisms of Austenitic Piping Under the Influence of Oxyhydrogen Reactions

2016 ◽  
Author(s):  
Stefan Offermanns ◽  
Stefan Weihe
Keyword(s):  
Failure Mechanisms ◽  
Shear Bands ◽  
Adiabatic Shear ◽  
Material Behavior ◽  
Inert Gas ◽  
Materials Testing ◽  
Failure Model ◽  
Adiabatic Shear Bands ◽  
Deformation And Failure ◽  
Gas Component

The present paper deals with the deformation and failure mechanisms of austenitic piping under the influence of oxyhydrogen reactions for the safety evaluation of incident scenarios in technical installations based on previous work of the author [1–5]. For the characterization of the processes, detonation tests performed at the Materials Testing Institute University of Stuttgart (MPA Stuttgart) have been used. The aim of these experiments was to study the detonation processes in head spray cooling piping of boiling water reactors. The experiments were performed on austenitic pipes with an outer diameter of O. D. = 114.3 mm and various wall thicknesses. Oxyhydrogen was used in its stoichiometric ratio of 2H2+O2 mixed with various amounts of an inert gas component. These tests have shown that less amounts of reactive gas may result in a stronger reaction of the pipe structure. This observation is attributed to the influence of the so-called overdriven detonation. Depending on the ratio of oxyhydrogen to the inert gas component and the pipe-wall thickness, adiabatic shear bands can occur in the piping structure. Adiabatic shear bands are very narrow zones with intense localized shear deformations due to the conversion of a significant portion of strain energy into heat. In order to describe this phenomenon numerically, a strain-based failure model was used which can reflect material damage over a wide range of different stress states. However, it has shown that damage of the studied material depends significantly on the Lode angle. Furthermore, no clear dependence of the failure limit on the loading rate has been found for the studied material. For the constitutive description of the material behavior under the occurring loading rates and temperatures suitable material models were selected and the required parameters have been evaluated experimentally and verified by numerical methods. With the aid of this constitutive description of the material behavior and the failure model numerical simulations of the detonation tests were carried out.

Deformation and failure mechanisms of granular soil around pressurised shallow cavities

Géotechnique ◽  
2021 ◽  
pp. 1-45
Author(s):  
Fernando Patino-Ramirez ◽  
Floriana Anselmucci ◽  
Edward Andò ◽  
Gioacchino Viggiani ◽  
Bernardo Caicedo ◽  
...  
Keyword(s):  
Failure Mechanisms ◽  
Granular Soil ◽  
Deformation And Failure ◽  
Shallow Cavities

The role of non-equilibrium grain boundary in micro-deformation and failure mechanisms of Bicrystal structural tungsten

2021 ◽  
Vol 94 ◽  
pp. 105376
Author(s):  
Ping Li ◽  
Lusheng Wang ◽  
Siliang Yan ◽  
Miao Meng ◽  
Yufeng Zhou ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Failure Mechanisms ◽  
Deformation And Failure ◽  
Micro Deformation ◽  
Non Equilibrium

Dynamic plastic deformation and failure mechanisms of individual microcapsule and its polymeric composites

2020 ◽  
Vol 139 ◽  
pp. 103933 ◽  
Author(s):  
Xin Zhang ◽  
Pengfei Wang ◽  
Dawei Sun ◽  
Xin Li ◽  
Jinliang An ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Failure Mechanisms ◽  
Polymeric Composites ◽  
Deformation And Failure ◽  
Dynamic Plastic Deformation

Deformation and failure mechanisms of nanoscale cellular structures of metallic glasses

RSC Advances ◽  
2016 ◽  
Vol 6 (103) ◽  
pp. 100899-100907 ◽  
Author(s):  
J. C. Zhang ◽  
C. Chen ◽  
Q. X. Pei ◽  
Q. Wan ◽  
W. X. Zhang ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Metallic Glasses ◽  
Failure Mechanisms ◽  
Cellular Structures ◽  
Light Weight ◽  
Deformation And Failure ◽  
Functional Applications ◽  
Absorption Performance

Cellular metallic glasses (MGs) can be good candidates for structural and functional applications due to their light weight, enhanced ductility and excellent energy absorption performance.

A study of the deformation and failure mechanisms of protective intermetallic coatings on AZ91 Mg alloys using microcantilever bending

2016 ◽  
Vol 120 ◽  
pp. 337-344 ◽  
Author(s):  
Mingyuan Lu ◽  
James Mead ◽  
Yueqin Wu ◽  
Hugh Russell ◽  
Han Huang
Keyword(s):  
Failure Mechanisms ◽  
Mg Alloys ◽  
Deformation And Failure ◽  
Intermetallic Coatings

scholarly journals Atomistic modelling of deformation and failure mechanisms in nanostructured materials

2014 ◽  
Vol 2 (2) ◽  
pp. 133-136 ◽  
Author(s):  
Xiaoyan Li ◽  
Huajian Gao
Keyword(s):  
Nanostructured Materials ◽  
Failure Mechanisms ◽  
Deformation And Failure ◽  
Atomistic Modelling
Sign in / Sign up

Export Citation Format

Share Document