TY  - JOUR
A1  - Cooper, Ryan C.
A1  - Bruno, Giovanni
A1  - Wheeler, M. R.
A1  - Pandey, A.
A1  - Watkins, T. R.
A1  - Shyarn, A.
T1  - Effect of microcracking on the uniaxial tensile response of beta-eucryptite ceramics
BT  - Experiments and constitutive model
JF  - Acta Materialia
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 beta-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 beta-eucryptite with varying levels of microcracking. The advantages of the SDMDA are discussed in regard to tensile loading.
KW  - behavior
Y1  - 2017
U6  - https://doi.org/10.1016/j.actamat.2017.06.033
SN  - 1359-6454
SN  - 1873-2453
VL  - 135
SP  - 361
EP  - 371
PB  - Elsevier
CY  - Oxford
ER  -