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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 9/10
Edited by: B.H.V. Topping
Paper IX.3

Numerical Study of Speciment Subjected to Shear Compression Stress Field

J. Davies

Department of Civil Engineering, The Polytechnic of Wales, Pontypridd, Wales

Full Bibliographic Reference for this paper
J. Davies, "Numerical Study of Speciment Subjected to Shear Compression Stress Field", in B.H.V. Topping, (Editor), "Proceedings of the Fourth International Conference on Civil and Structural Engineering Computing", Civil-Comp Press, Edinburgh, UK, pp 351-360, 1989. doi:10.4203/ccp.9.9.3
The study of the distribution of elastic stresses between crack tips represents a special interest in the understanding of the mechanism of fracture. The Finite Element Analysis was used to determine the influence of geometry and loading conditions on the stress distribution in specimens proposed for fracture testing of cementitious materials in shear. It was shown that the maximum shear stresses generated between two opposite notches are of significant magnitude and may be the driving force during fracture process. To establish the contribution of the shear part of the loading towards the overall cracking process, the mixed mode stress intensity factors KI and KII at the crack tips were estimated from numerical displacements. It was established that KII is significantly higher than KI, therefore, indicating that the shear part of loading plays an important role during the fracture process. The numerical study was complemented by a series of experiments which confirmed that shear fracture can be generated under the specific loading conditions.

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