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Analysis of crack propagation in a “pull-out” test Cover

Analysis of crack propagation in a “pull-out” test

Studia Geotechnica et Mechanica
Volume 41 (2019): Issue 3 (September 2019)
By: Jakub Gontarz and  Jerzy Podgórski  
Open Access
|Sep 2019
Figures & tables

Figures & Tables

Figure 1

Pre-set undercut Hilti HDA-P anchor.

Figure 2

a) scheme of mounting the anchor, b) used anchor.

Figure 3

Scheme of the task.

Figure 4

Compression with extensometer test.

Figure 5

Results of the compressive tests: a) relation between the force and vertical displacement, b) relation between horizontal and vertical displacement.

Figure 6

Scheme of the three point bending test with the notch.

Figure 7

Three point bending test for notched beams.

Figure 8

The quasi-Brazilian test.

Figure 9

Model of the test before the load application.

Figure 10

Last step of calculation from simulation with anchor and friction coefficient μ = 0.2.

Figure 11

Graph of force dependence on the horizontal range of the crack.

Figure 12

Crack paths for different methods of applying the load.

Figure 13

Pull-out test performed on actual rock (Jonak et al., 2019).

Figure 14

A cross-section of the actual pull-out sample: a) Sandstone, b) Porphyry

Figure 15

The shape of the actual pull-out sandstone sample.

Figure 16

Definition of the material effort ratio μ

Figure 17

a) The limit surface associated with author Ottosen-Podgórski (PJ) criterion compared with Drucker-Prager cone, b) Coulomb-Mohr, Drucker-Prager and PJ criteria at 2D stress state.

Figure 18

a) Values of the material effort ratio μ near the crack tip, b) the exemplary gradient-crack direction dependency.

Figure 19

Predicted crack path found with own method.

Figure 20

Values of material effort ratio for different angles and different distance from the crack tip.
DOI: https://doi.org/10.2478/sgem-2019-0015 | Journal eISSN: 2083-831X | Journal ISSN: 0137-6365
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Language: English
Page range: 160 - 170
Submitted on: Feb 15, 2019
Accepted on: Jun 4, 2019
Published on: Sep 30, 2019
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
Pull-out test,
rock mechanics,
fracture mechanics,
numerical modeling of fracture
Related subjects:
Geosciences,
Geosciences, other,
Materials sciences,
Composites,
Porous materials,
Physics,
Mechanics and fluid dynamics

© 2019 Jakub Gontarz, Jerzy Podgórski, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Volume 41 (2019): Issue 3 (September 2019)
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