On the Tensile Strength of Granite at High Strain Rates considering the Influence from Preexisting Cracks
Joint Authors
Saadati, Mahdi
Forquin, Pascal
Weddfelt, Kenneth
Larsson, Per-Lennart
Source
Advances in Materials Science and Engineering
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-07-14
Country of Publication
Egypt
No. of Pages
9
Abstract EN
The dynamic tensile behavior of granite samples, when some preexisting cracks are introduced artificially, is investigated.
Spalling tests using a Hopkinson bar are performed and strain rates of ~102 1/s are obtained in both specimen types (with and without initial cracks).
This experimental technique is employed being of the same order as strain rates in rock materials during percussive drilling, the application of interest here.
The dynamic tensile responses of both sample-sets are compared using the velocity profile measured on the free-end of the sample.
Furthermore, an anisotropic damage model based on the concept of obscuration probability describes the response without preexisting cracks.
Here, a term of cohesive strength in obscuration zones is added to accurately handle the softening behavior of the material in tension.
Results from the spalling tests are used to validate the model prediction of the dynamic tensile strength and also to calibrate the cohesive model parameters.
Damaged elements are numerically introduced in the finite element calculations simulating the spalling experiments performed on predamaged samples.
The results are compared with the experimental ones.
Good agreement is obtained showing that a two-scale approach may constitute a suitable method to simulate numerically the tensile response of predamaged granite.
American Psychological Association (APA)
Saadati, Mahdi& Forquin, Pascal& Weddfelt, Kenneth& Larsson, Per-Lennart. 2016. On the Tensile Strength of Granite at High Strain Rates considering the Influence from Preexisting Cracks. Advances in Materials Science and Engineering،Vol. 2016, no. 2016, pp.1-9.
https://search.emarefa.net/detail/BIM-1096269
Modern Language Association (MLA)
Saadati, Mahdi…[et al.]. On the Tensile Strength of Granite at High Strain Rates considering the Influence from Preexisting Cracks. Advances in Materials Science and Engineering No. 2016 (2016), pp.1-9.
https://search.emarefa.net/detail/BIM-1096269
American Medical Association (AMA)
Saadati, Mahdi& Forquin, Pascal& Weddfelt, Kenneth& Larsson, Per-Lennart. On the Tensile Strength of Granite at High Strain Rates considering the Influence from Preexisting Cracks. Advances in Materials Science and Engineering. 2016. Vol. 2016, no. 2016, pp.1-9.
https://search.emarefa.net/detail/BIM-1096269
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1096269