Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Kenneth Weddfelt"'
Autor:
Pascal Forquin, Mahdi Saadati, Dominique Saletti, Bratislav Lukic, Federico Schiaffini, Kenneth Weddfelt, Per-Lennart Larsson
Publikováno v:
Applied Sciences, Vol 12, Iss 22, p 11621 (2022)
In the present study, dynamic experiments are developed to investigate the induced damage modes when Lingulid sandstone is subjected to dynamic and impact loading. To do so, a series of spalling tests were carried out in order to investigate the mate
Externí odkaz:
https://doaj.org/article/98c1408a8e9343bea7b13d2954067c7f
Autor:
Pascal Forquin, Mahdi Saadati, Dominique Saletti, Bratislav Lukic, Frederico Schiaffini, Kenneth Weddfelt, Per-Lennart Larsson
Publikováno v:
Applied Sciences, Vol 12, Iss 21, p 10806 (2022)
A constitutive model able to describe both tensile damage and plastic deformation under confinement is a prerequisite to numerically simulate the behaviour of sandstone rock under an impact loading induced in a percussive drilling process. Therefore,
Externí odkaz:
https://doaj.org/article/9d95eac28096402ea7da23dd848a26cb
Publikováno v:
Lubricants, Vol 8, Iss 12, p 106 (2020)
The rock fragmentation response to drilling, in particular percussive drilling, is important in order to improve the efficiency of such an operation. The resulting problem includes spherical contact between the drill bit and the material and therefor
Externí odkaz:
https://doaj.org/article/cb9a238820544301a529b9b5f6fb9e83
Publikováno v:
Advances in Materials Science and Engineering, Vol 2016 (2016)
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
Externí odkaz:
https://doaj.org/article/51fe15ca1a95402f986bb70e9c58ccf5
Publikováno v:
Rock Mechanics and Rock Engineering. 53:5809-5821
The focus of this work is toward an investigation of the mechanical response of a variety of rocks to indentation loading as a close condition to drilling application. A rock classification method is introduced based on the mechanical response of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0df24b6c972c0e2f62fc6ecd7a49512e
https://doi.org/10.1007/s00603-020-02242-9
https://doi.org/10.1007/s00603-020-02242-9
Publikováno v:
International Journal for Numerical and Analytical Methods in Geomechanics
International Journal for Numerical and Analytical Methods in Geomechanics, Wiley, 2022, ⟨10.1002/nag.3303⟩
International Journal for Numerical and Analytical Methods in Geomechanics, Wiley, 2022, ⟨10.1002/nag.3303⟩
An anisotropic damage model is employed in order to simulate the fracture pattern of Bohus granite under quasi-static spherical indentation loading. The chosen damage description is added to the previously employed Drucker-Prager plasticity model wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::164dd1f83799420006cb335080b8aaa6
Publikováno v:
International Journal of Rock Mechanics and Mining Sciences. 100:170-176
The load capacity of selected hard rocks subjected to circular flat punch indentation is investigated. The compacted zone underneath the indenter is assumed to be limited and only responsible for the load transition to the rest of the material. There
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::336263029d7105030eafb0401cdc202a
https://doi.org/10.1016/j.ijrmms.2017.10.001
https://doi.org/10.1016/j.ijrmms.2017.10.001
Autor:
Kenneth Weddfelt, Hossein Shariati, Mahdi Saadati, Per-Lennart Larsson, Amine Bouterf, François Hild
Publikováno v:
Rock Mechanics and Rock Engineering
Rock Mechanics and Rock Engineering, Springer Verlag, 2019, 52, pp.645-657. ⟨10.1007/s00603-018-1646-3⟩
Rock Mechanics and Rock Engineering, Springer Verlag, 2019, 52, pp.645-657. ⟨10.1007/s00603-018-1646-3⟩
International audience; The inelastic behavior of Bohus granite is investigated based on experimental and numerical results. The yield surface and related dilation angle are determined based on quasi-oedometric tests performed in an earlier work. It
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c722189bba02a171f98b950d968e6333
https://hal.archives-ouvertes.fr/hal-01924594
https://hal.archives-ouvertes.fr/hal-01924594
Publikováno v:
Journal of Engineering Materials and Technology. 140
The focus in this work is toward an investigation of the fracture response of brittle materials with different specimen size loaded in diametral compression using different boundary conditions. The compacted zone underneath the loading points is assu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::832fcb6e02be23d488515ae508551d69
https://doi.org/10.1115/1.4039290
https://doi.org/10.1115/1.4039290
Publikováno v:
Journal of Testing and Evaluation
Journal of Testing and Evaluation, ASTM International, 2018, 46 (1), pp.33-45. ⟨10.1520/JTE20160072⟩
Journal of Testing and Evaluation, ASTM International, 2018, 46 (1), pp.33-45. ⟨10.1520/JTE20160072⟩
International audience; In this investigation, experiments are carried out in order to determine the mechanical properties of Bohus granite considering the influence from pre-existing cracks and defects. The experimental investigation aims at a compl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3d5d992d3dbc622dfcfe5ab875a9c76
https://hal.archives-ouvertes.fr/hal-01674573
https://hal.archives-ouvertes.fr/hal-01674573