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Atomistic Simulation of a Two-Dimensional Polymer Tougher Than Graphene Read chapter Read first chapter

2017 | OriginalPaper | Chapter

27. Which One Has More Influence on Fracture Strength of Ceramics: Pressure or Strain Rate?

Authors : M. Shafiq, G. Subhash

Published in: Dynamic Behavior of Materials, Volume 1

Publisher: Springer International Publishing

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Abstract

Both strain rate and confinement pressure have been known to have a strong influence on the failure strength of ceramics. However, the debate about which one has more influence has never been resolved. This manuscript aims to conclusively prove that confinement pressure has significantly higher influence than strain rate on the compressive strength of a ceramic. Normalized shear stress versus hydrostatic pressure plot on a variety of ceramics shows that the quasi-static and dynamic strength of brittle solids is a strong function of applied pressure and not the strain rate. The plots also revealed that despite the differences in material properties, test methods, and strain rate the data on failure strength fall in a narrow range and therefore a unified model, that extends the traditional Mohr-Coulomb criteria by adding an exponential term, can capture the overall deformation behavior of structural ceramics at high pressures.

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previous chapter A General Approach to Evaluate the Dynamic Fracture Toughness of Materials
next chapter Dynamic Strength and Fragmentation Experiments on Brittle Materials Using Theta-Specimens
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Metadata
Title
Which One Has More Influence on Fracture Strength of Ceramics: Pressure or Strain Rate?
Authors
M. Shafiq
G. Subhash
Copyright Year
2017
Book
Dynamic Behavior of Materials, Volume 1

Print ISBN: 978-3-319-41131-6

Electronic ISBN: 978-3-319-41132-3

Copyright Year: 2017

DOI
https://doi.org/10.1007/978-3-319-41132-3_27

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