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

Jakub Gontarz

Jakub Gontarz

Faculty of Civil Engineering and Architecture, Lublin University of TechnologyLublin, Poland
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Gontarz, Jakub
 e 
Jerzy Podgórski

Jerzy Podgórski

Faculty of Civil Engineering and Architecture, Lublin University of TechnologyLublin, Poland
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Podgórski, Jerzy
  
30 set 2019
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Categoria dell'articolo: Research Article
Pubblicato online: 30 set 2019
Pagine: 160 - 170
Ricevuto: 15 feb 2019
Accettato: 04 giu 2019
DOI: https://doi.org/10.2478/sgem-2019-0015
Parole chiave
© 2019 Jakub Gontarz, Jerzy Podgórski, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Figure 1

Pre-set undercut Hilti HDA-P anchor.
Pre-set undercut Hilti HDA-P anchor.

Figure 2

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

Figure 3

Scheme of the task.
Scheme of the task.

Figure 4

Compression with extensometer test.
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.
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.
Scheme of the three point bending test with the notch.

Figure 7

Three point bending test for notched beams.
Three point bending test for notched beams.

Figure 8

The quasi-Brazilian test.
The quasi-Brazilian test.

Figure 9

Model of the test before the load application.
Model of the test before the load application.

Figure 10

Last step of calculation from simulation with anchor and friction coefficient μ = 0.2.
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.
Graph of force dependence on the horizontal range of the crack.

Figure 12

Crack paths for different methods of applying the load.
Crack paths for different methods of applying the load.

Figure 13

Pull-out test performed on actual rock (Jonak et al., 2019).
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
A cross-section of the actual pull-out sample: a) Sandstone, b) Porphyry

Figure 15

The shape of the actual pull-out sandstone sample.
The shape of the actual pull-out sandstone sample.

Figure 16

Definition of the material effort ratio μ
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.
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.
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.
Predicted crack path found with own method.

Figure 20

Values of material effort ratio for different angles and different distance from the crack tip.
Values of material effort ratio for different angles and different distance from the crack tip.
Lingua:
Inglese
Frequenza di pubblicazione:
4 volte all'anno
Argomenti della rivista:
Geoscienze, Geoscienze, altro, Scienze materiali, Compositi, Materiali porovati, Fisica, Meccanica e dinamica dei fluidi
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