Effect of microcracking on the uniaxial tensile response of β-eucryptite ceramics: Experiments and constitutive model

R. C. Cooper; G. Bruno; M. R. Wheeler; A. Pandey; T. R. Watkins; A. Shyam

doi:10.1016/j.actamat.2017.06.033

Effect of microcracking on the uniaxial tensile response of β-eucryptite ceramics: Experiments and constitutive model

R. C. Cooper
, G. Bruno
, M. R. Wheeler
, A. Pandey
, T. R. Watkins
, A. Shyam

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

A constitutive model for the nonlinear or “pseudoplastic” mechanical behavior in a linear-elastic solid with thermally induced microcracks is developed and applied to experimental results. The model is termed strain dependent microcrack density approximation (SDMDA) and is an extension of the modified differential scheme that describes the slope of the stress-strain curves of microcracked solids. SDMDA allows a continuous variation in the microcrack density with tensile loading. Experimental uniaxial tensile response of β-eucryptite glass and ceramics with controlled levels of microcracking is reported. It is demonstrated that SDMDA can well describe the extent of non-linearity in the experimental uniaxial tensile response of β-eucryptite with varying levels of microcracking. The advantages of the SDMDA are discussed in regard to tensile loading.

Original language	English
Pages (from-to)	361-371
Number of pages	11
Journal	Acta Materialia
Volume	135
DOIs	https://doi.org/10.1016/j.actamat.2017.06.033
State	Published - Aug 15 2017

Funding

Microtensile testing and sample machining were made possible by the U.S Department of Energy, Office of Fossil Energy, Solid State Energy Conversion Alliance (SECA) Program. Research also partially sponsored by the U.S. Department of Energy, Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies, as part of the Propulsion Materials Program. The authors thank James E. Webb of Corning Inc. for supplying the uncerammed glass for this study and sharing the devitrification procedures. Authors thank Andrew A. Wereszczak (ORNL) and Edgar Lara-Curzio (ORNL) for reviewing this manuscript.

Keywords

Microcracking
Modeling
Tensile behavior
Young's modulus
β-eucryptite

Access to Document

10.1016/j.actamat.2017.06.033

Cite this

@article{ebacfb377b7241febf4ac27ed5cb9399,

title = "Effect of microcracking on the uniaxial tensile response of β-eucryptite ceramics: Experiments and constitutive model",

abstract = "A constitutive model for the nonlinear or “pseudoplastic” mechanical behavior in a linear-elastic solid with thermally induced microcracks is developed and applied to experimental results. The model is termed strain dependent microcrack density approximation (SDMDA) and is an extension of the modified differential scheme that describes the slope of the stress-strain curves of microcracked solids. SDMDA allows a continuous variation in the microcrack density with tensile loading. Experimental uniaxial tensile response of β-eucryptite glass and ceramics with controlled levels of microcracking is reported. It is demonstrated that SDMDA can well describe the extent of non-linearity in the experimental uniaxial tensile response of β-eucryptite with varying levels of microcracking. The advantages of the SDMDA are discussed in regard to tensile loading.",

keywords = "Microcracking, Modeling, Tensile behavior, Young's modulus, β-eucryptite",

author = "Cooper, \{R. C.\} and G. Bruno and Wheeler, \{M. R.\} and A. Pandey and Watkins, \{T. R.\} and A. Shyam",

note = "Publisher Copyright: {\textcopyright} 2017 Acta Materialia Inc.",

year = "2017",

month = aug,

day = "15",

doi = "10.1016/j.actamat.2017.06.033",

language = "English",

volume = "135",

pages = "361--371",

journal = "Acta Materialia",

issn = "1359-6454",

publisher = "Elsevier",

}

TY - JOUR

T1 - Effect of microcracking on the uniaxial tensile response of β-eucryptite ceramics

T2 - Experiments and constitutive model

AU - Cooper, R. C.

AU - Bruno, G.

AU - Wheeler, M. R.

AU - Pandey, A.

AU - Watkins, T. R.

AU - Shyam, A.

PY - 2017/8/15

Y1 - 2017/8/15

N2 - A constitutive model for the nonlinear or “pseudoplastic” mechanical behavior in a linear-elastic solid with thermally induced microcracks is developed and applied to experimental results. The model is termed strain dependent microcrack density approximation (SDMDA) and is an extension of the modified differential scheme that describes the slope of the stress-strain curves of microcracked solids. SDMDA allows a continuous variation in the microcrack density with tensile loading. Experimental uniaxial tensile response of β-eucryptite glass and ceramics with controlled levels of microcracking is reported. It is demonstrated that SDMDA can well describe the extent of non-linearity in the experimental uniaxial tensile response of β-eucryptite with varying levels of microcracking. The advantages of the SDMDA are discussed in regard to tensile loading.

AB - A constitutive model for the nonlinear or “pseudoplastic” mechanical behavior in a linear-elastic solid with thermally induced microcracks is developed and applied to experimental results. The model is termed strain dependent microcrack density approximation (SDMDA) and is an extension of the modified differential scheme that describes the slope of the stress-strain curves of microcracked solids. SDMDA allows a continuous variation in the microcrack density with tensile loading. Experimental uniaxial tensile response of β-eucryptite glass and ceramics with controlled levels of microcracking is reported. It is demonstrated that SDMDA can well describe the extent of non-linearity in the experimental uniaxial tensile response of β-eucryptite with varying levels of microcracking. The advantages of the SDMDA are discussed in regard to tensile loading.

KW - Microcracking

KW - Modeling

KW - Tensile behavior

KW - Young's modulus

KW - β-eucryptite

UR - https://www.scopus.com/pages/publications/85021372903

U2 - 10.1016/j.actamat.2017.06.033

DO - 10.1016/j.actamat.2017.06.033

M3 - Article

AN - SCOPUS:85021372903

SN - 1359-6454

VL - 135

SP - 361

EP - 371

JO - Acta Materialia

JF - Acta Materialia

ER -

Effect of microcracking on the uniaxial tensile response of β-eucryptite ceramics: Experiments and constitutive model

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this