Relative performance of metal and polymeric foam sandwich plates under low velocity impact
Relative performance of metal and polymeric foam cored sandwich plates is studied under low velocity impact loading. The metal and polymeric foam sandwich plates are constructed using a core of 40 mm thickness (with two layers of 20 mm each) and aluminum faceplates. Metal foam sandwich plates are co...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2014
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| Online Access: | https://hdl.handle.net/10356/103635 http://hdl.handle.net/10220/19327 |
| _version_ | 1811684862627676160 |
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| author | Rajaneesh, A. Sridhar, I. Rajendran, S. |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Rajaneesh, A. Sridhar, I. Rajendran, S. |
| author_sort | Rajaneesh, A. |
| collection | NTU |
| description | Relative performance of metal and polymeric foam cored sandwich plates is studied under low velocity impact loading. The metal and polymeric foam sandwich plates are constructed using a core of 40 mm thickness (with two layers of 20 mm each) and aluminum faceplates. Metal foam sandwich plates are constructed using aluminum alloy foam (ALPORAS) core while polymeric foam sandwich plates are constructed using polyvinyl chloride (Divinycell H80 and H250) foam core. Impact experiments are conducted with a hemispherical punch of mass 8.7 kg at a nominal velocity of 5.8 m/s. The effect of stepwise core grading on the maximum dynamic penetration force as well as energy absorption is studied. To maximize the energy absorption or to minimize the mass of the sandwich plate for a given penetration force, alternatives to Alporas foam are chosen based on either equivalent density (H250) or through-thickness compressive yield strength (H80). The increase in penetration force and energy absorption resulting from the choice of H250 in place of Alporas for the same density of the foam as well as the effect of decrease in mass of the sandwich panel by choosing H80 foam in place of Alporas for the same compressive strength of the foam is discussed. Numerical models were developed in LS-Dyna to predict the impact response (force-displacement history) and failure modes. Upperbound analysis is used to estimate the maximum penetration force. Peak force, energy absorption values and failure mode patterns obtained by analytical estimates, experimental measurements and numerical predictions all agree well. |
| first_indexed | 2024-10-01T04:35:22Z |
| format | Journal Article |
| id | ntu-10356/103635 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:35:22Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1036352023-03-04T17:20:33Z Relative performance of metal and polymeric foam sandwich plates under low velocity impact Rajaneesh, A. Sridhar, I. Rajendran, S. School of Mechanical and Aerospace Engineering DRNTU::Engineering::Aeronautical engineering Relative performance of metal and polymeric foam cored sandwich plates is studied under low velocity impact loading. The metal and polymeric foam sandwich plates are constructed using a core of 40 mm thickness (with two layers of 20 mm each) and aluminum faceplates. Metal foam sandwich plates are constructed using aluminum alloy foam (ALPORAS) core while polymeric foam sandwich plates are constructed using polyvinyl chloride (Divinycell H80 and H250) foam core. Impact experiments are conducted with a hemispherical punch of mass 8.7 kg at a nominal velocity of 5.8 m/s. The effect of stepwise core grading on the maximum dynamic penetration force as well as energy absorption is studied. To maximize the energy absorption or to minimize the mass of the sandwich plate for a given penetration force, alternatives to Alporas foam are chosen based on either equivalent density (H250) or through-thickness compressive yield strength (H80). The increase in penetration force and energy absorption resulting from the choice of H250 in place of Alporas for the same density of the foam as well as the effect of decrease in mass of the sandwich panel by choosing H80 foam in place of Alporas for the same compressive strength of the foam is discussed. Numerical models were developed in LS-Dyna to predict the impact response (force-displacement history) and failure modes. Upperbound analysis is used to estimate the maximum penetration force. Peak force, energy absorption values and failure mode patterns obtained by analytical estimates, experimental measurements and numerical predictions all agree well. Accepted version 2014-05-15T01:51:38Z 2019-12-06T21:16:47Z 2014-05-15T01:51:38Z 2019-12-06T21:16:47Z 2014 2014 Journal Article Rajaneesh, A., Sridhar, I., & Rajendran, S. (2014). Relative performance of metal and polymeric foam sandwich plates under low velocity impact. International Journal of Impact Engineering, 65,126-136. 0734-743X https://hdl.handle.net/10356/103635 http://hdl.handle.net/10220/19327 10.1016/j.ijimpeng.2013.11.012 178715 en International journal of impact engineering © 2014 Elsevier Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by International Journal of Impact Engineering, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.ijimpeng.2013.11.012]. application/pdf |
| spellingShingle | DRNTU::Engineering::Aeronautical engineering Rajaneesh, A. Sridhar, I. Rajendran, S. Relative performance of metal and polymeric foam sandwich plates under low velocity impact |
| title | Relative performance of metal and polymeric foam sandwich plates under low velocity impact |
| title_full | Relative performance of metal and polymeric foam sandwich plates under low velocity impact |
| title_fullStr | Relative performance of metal and polymeric foam sandwich plates under low velocity impact |
| title_full_unstemmed | Relative performance of metal and polymeric foam sandwich plates under low velocity impact |
| title_short | Relative performance of metal and polymeric foam sandwich plates under low velocity impact |
| title_sort | relative performance of metal and polymeric foam sandwich plates under low velocity impact |
| topic | DRNTU::Engineering::Aeronautical engineering |
| url | https://hdl.handle.net/10356/103635 http://hdl.handle.net/10220/19327 |
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