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Use of stochastic XFEM in the investigation of heterogeneity effects on the tensile strength of intermediate geotechnical materials

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Dyson, AP, Tang, Z and Tolooiyan, A ORCID: 0000-0001-8072-636X 2018 , 'Use of stochastic XFEM in the investigation of heterogeneity effects on the tensile strength of intermediate geotechnical materials' , Finite Elements in Analysis and Design, vol. 145 , pp. 1-9 , doi: 10.1016/j.finel.2018.03.003.

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Abstract

The numerical simulation of an Unconfined Expansion Test (UET) is presented with tensile strength fracture criteria assigned by stochastic methods to take into account material heterogeneity. Tests are performed by producing radial cavity expansion models of thinly sliced cylindrical specimens. The introduction of element-wise allocation of fracture parameters generates instances of specimen failure without the requirement of predefined fracture zones, permitting discontinuities to form naturally within zones containing weak strength parameters. The parallel application of an in-house Python scripts and eXtended Finite Element Method (XFEM) facilitates the investigation of heterogeneity effects on the tensile strength of intermediate geotechnical materials.

Item Type: Article
Authors/Creators:Dyson, AP and Tang, Z and Tolooiyan, A
Keywords: intermediate geotechnical material, fracture mechanics, stochastic methods, extended finite element method, unconfined expansion test
Journal or Publication Title: Finite Elements in Analysis and Design
Publisher: Elsevier Science Bv
ISSN: 0168-874X
DOI / ID Number: 10.1016/j.finel.2018.03.003
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