Finite Element Analysis of Plane Shear(Mode II) Fracture Mechanism of Brittle Rock at High Temperature

Zhi Wang; Hai Wei Sun; Shi Peng Shang; Wei Xing Shi

doi:10.4028/www.scientific.net/AMR.446-449.3628

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 446-449Finite Element Analysis of Plane Shear(Mode II)...

Finite Element Analysis of Plane Shear(Mode II) Fracture Mechanism of Brittle Rock at High Temperature

Abstract:

Finite element method is used to calculate the crack-tip stresses of rock specimens under plane compression-shear loading in order to study the mechanism of plane shear(Mode II)fracture. Numerical results show that both the tensile and shear stresses exist at the crack tip and the ratio of maximum shear stress to maximum tensile stress,τ_max/σ₁,is about 3-6. Since the additional compressive can restrain tensile stresses at the crack-tip, τ_max can easily reach its limited value before σ₁ and cause plane shear(Mode II)fracture. Plane shear-box test is a potential method for obtaining Mode II fracture of rock and determining Mode II fracture toughness K_IIC of rock.

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Periodical:

Advanced Materials Research (Volumes 446-449)

Pages:

3628-3632

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.446-449.3628

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Online since:

January 2012

Authors:

Zhi Wang, Hai Wei Sun, Shi Peng Shang, Wei Xing Shi

Keywords:

Finite Element Method (FEM), Fracture Machanism, High-Temperature, Plane Compression-Shear, Plane Shear (Mode II) Fracture, Rock

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