Impact on porous targets: Penetration, crater formation, target compaction, and ejection
Using a granular-mechanics code, we study the impact of a sphere into a porous adhesive granular target, consisting of monodisperse silica grains. The model includes elastic repulsive, adhesive, and dissipative forces, as well as sliding, rolling, and twisting friction. Impact velocities of up to 30...
| Authors: | ; ; |
|---|---|
| Format: | Article |
| Status: | Published version |
| Publication date: | 2012 |
| Country: | Argentina |
| Institution: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repository: | CONICET Digital (CONICET) |
| Language: | English |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/20473 |
| Online Access: | http://hdl.handle.net/11336/20473 |
| Access Level: | Open access |
| Keyword: | Grains Craters https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| _version_ | 1878403762527141888 |
|---|---|
| author | Ringl, Christian |
| author2 | Bringa, Eduardo Marcial Urbassek, Herbert M. |
| author2_role | author author |
| author_browse | Bringa, Eduardo Marcial Ringl, Christian Urbassek, Herbert M. |
| author_facet | Ringl, Christian Bringa, Eduardo Marcial Urbassek, Herbert M. |
| author_role | author |
| collection | CONICET Digital (CONICET) |
| description | Using a granular-mechanics code, we study the impact of a sphere into a porous adhesive granular target, consisting of monodisperse silica grains. The model includes elastic repulsive, adhesive, and dissipative forces, as well as sliding, rolling, and twisting friction. Impact velocities of up to 30 m/s and target filling factors (densities) between 19% and 35% have been systematically studied. We find that the projectile is stopped by an effective drag force which is proportional to the square of its velocity. Target adhesion influences projectile stopping only below a critical velocity, which increases with adhesion. The penetration depth depends approximately logarithmically on the impact velocity and is inversely proportional to the target density. The excavated crater is of conical form and is surrounded by a compaction zone whose width increases but whose maximum value decreases with increasing target density. Grain ejection increases in proportion with impactor velocity. Grains are ejected which have originally been buried to a depth of 8Rgrain below the surface; the angular distribution favors oblique ejection with a maximum around 45◦. The velocity distribution of ejected grains features a broad low-velocity maximum around 0.5–1 m/s but exhibits a high-velocity tail up to ∼15% of the projectile impact velocity. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | AR_bb9a44232bf2a0dd3c8d73dc4e776147 |
| identifier_str_mv | Ringl, Christian; Bringa, Eduardo Marcial; Urbassek, Herbert M.; Impact on porous targets: Penetration, crater formation, target compaction, and ejection; American Physical Society; Physical Review E: Statistical, Nonlinear And Soft Matter Physics; 86; 6; 12-2012; 61313-61321 1539-3755 CONICET Digital CONICET |
| institution | Consejo Nacional de Investigaciones Científicas y Técnicas |
| instname_str | Consejo Nacional de Investigaciones Científicas y Técnicas |
| language | eng |
| network_acronym_str | AR |
| network_name_str | Argentina |
| oai_identifier_str | oai:ri.conicet.gov.ar:11336/20473 |
| publishDate | 2012 |
| publishDateSort | 2012 |
| publisher | American Physical Society |
| publisherStr | American Physical Society |
| reponame_str | CONICET Digital (CONICET) |
| spelling | Impact on porous targets: Penetration, crater formation, target compaction, and ejection Ringl, Christian Bringa, Eduardo Marcial Urbassek, Herbert M. Grains Craters https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 Using a granular-mechanics code, we study the impact of a sphere into a porous adhesive granular target, consisting of monodisperse silica grains. The model includes elastic repulsive, adhesive, and dissipative forces, as well as sliding, rolling, and twisting friction. Impact velocities of up to 30 m/s and target filling factors (densities) between 19% and 35% have been systematically studied. We find that the projectile is stopped by an effective drag force which is proportional to the square of its velocity. Target adhesion influences projectile stopping only below a critical velocity, which increases with adhesion. The penetration depth depends approximately logarithmically on the impact velocity and is inversely proportional to the target density. The excavated crater is of conical form and is surrounded by a compaction zone whose width increases but whose maximum value decreases with increasing target density. Grain ejection increases in proportion with impactor velocity. Grains are ejected which have originally been buried to a depth of 8Rgrain below the surface; the angular distribution favors oblique ejection with a maximum around 45◦. The velocity distribution of ejected grains features a broad low-velocity maximum around 0.5–1 m/s but exhibits a high-velocity tail up to ∼15% of the projectile impact velocity. Fil: Ringl, Christian. Universität Kaiserslautern; Alemania Fil: Bringa, Eduardo Marcial. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina Fil: Urbassek, Herbert M.. Universität Kaiserslautern; Alemania American Physical Society http://hdl.handle.net/11336/20473 Ringl, Christian; Bringa, Eduardo Marcial; Urbassek, Herbert M.; Impact on porous targets: Penetration, crater formation, target compaction, and ejection; American Physical Society; Physical Review E: Statistical, Nonlinear And Soft Matter Physics; 86; 6; 12-2012; 61313-61321 1539-3755 CONICET Digital CONICET |
| spellingShingle | Impact on porous targets: Penetration, crater formation, target compaction, and ejection Ringl, Christian Grains Craters https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| status_str | publishedVersion |
| title | Impact on porous targets: Penetration, crater formation, target compaction, and ejection |
| title_full | Impact on porous targets: Penetration, crater formation, target compaction, and ejection |
| title_fullStr | Impact on porous targets: Penetration, crater formation, target compaction, and ejection |
| title_full_unstemmed | Impact on porous targets: Penetration, crater formation, target compaction, and ejection |
| title_short | Impact on porous targets: Penetration, crater formation, target compaction, and ejection |
| title_sort | Impact on porous targets: Penetration, crater formation, target compaction, and ejection |
| topic | Grains Craters https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| topic_facet | Grains Craters https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| url | http://hdl.handle.net/11336/20473 |