Numerical simulations of tests on atypical specimens for estimation of fracture parameters of quasi brittle materials

abstrakt

angličtina

The work deals with a numerical analysis of fracture propagation in atypical test specimens (made of material with quasi-brittle manner) subjected to a novel test configuration. The aim is to select suitable test geometries and specimen shapes/sizes for future studies and real tests. The tests will be simulated in ATENA 2D software enabling modeling of cohesive crack propagation. The test specimens/geometries should represent wide line of different shapes: from compact specimens (like WST) to long ones (3PB) which should considerably differ in constraint conditions. The same type of loading will be used for the whole specimen/geometry set - a wedge mechanism causing splitting the test specimen (apart from compressing/bending of the specimen in the direction perpendicular to the splitting forces). The specimens shapes/test configurations selected for the real testing will be further numerically analyzed in detail in order to investigate the stress and displacement fields in the cracked bodies. So, a part of the present research is also focused on the over-deterministic analysis of the fields around the crack tip described via Williams power series.

numerické simulace, atypická tělesa, lomové parametry, kvazikřehké materiály

SOBEK, J.; VESELÝ, V.

12. 11. 2012

Špičák, Česká republika

978-80-261-0157-4

Computational Mechanics 2012

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