Modification of Charpy machine for the acquisition of stress-strain curve in thermoplastics
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| Natura: | Artículo científico |
| Lingua: | en |
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Universidad Nacional de Colombia
2020
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| _version_ | 1876441909557198848 |
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| author | Luis Miguel Zabala-Gualtero |
| author_facet | Luis Miguel Zabala-Gualtero |
| contents | Modification of Charpy machine for the acquisition of stress-strain curve in thermoplastics Luis Miguel Zabala-Gualtero Ulises Figuero-López Andrea Guevara-Morales Alejandro Rojo-Valerio Ingeniería DYNA tension thermoplastics Mechanical properties impact testing equipment Simulations of impact events in the automotive industry are now a common practice. Vehicle crashworthiness simulations on plastic components cover a wide range of strain rates from 0.01-500 s-1. Because plastic mechanical properties are very dependent on strain rate, developing experimental methods for generating stress-strain curves at this strain rate range is of great technological importance. In this paper, a modified Charpy machine capable of acquiring useful information to obtain the stress-strain curve is presented. Strain rates between 300-400 s-1 were achieved. Three thermoplastics were tested: high-density polyethylene, polypropylene-copolymer and polypropylene-homopolymer. Impact simulations using LS-DYNA were performed using the acquired high-strain rates stress-strain curves and compared with experimental data. Simulations using stress-strain curves from quasi-static tests were also performed for comparison against high-speed. Very good agreement between the simulation and experimental results was found when the ASTM D1822 type S specimen was used for testing each material. 2020 artículo científico 0012-7353 https://www.redalyc.org/articulo.oa?id=49664596007 https://www.redalyc.org/journal/496/49664596007/ https://www.redalyc.org/journal/496/49664596007/html/ https://www.redalyc.org/journal/496/49664596007/49664596007.epub https://www.redalyc.org/journal/496/49664596007/movil 10.15446/dyna.v87n213.83469 en http://www.redalyc.org/revista.oa?id=496 Dyna application/pdf Universidad Nacional de Colombia Dyna (Colombia) Num.213 Vol.87 |
| format | Artículo científico |
| id | redalyc_49664596007 |
| institution | Redalyc |
| language | en |
| publishDate | 2020 |
| publisher | Universidad Nacional de Colombia |
| spellingShingle | Modification of Charpy machine for the acquisition of stress-strain curve in thermoplastics Luis Miguel Zabala-Gualtero Ingeniería DYNA tension thermoplastics Mechanical properties impact testing equipment Modification of Charpy machine for the acquisition of stress-strain curve in thermoplastics Luis Miguel Zabala-Gualtero Ulises Figuero-López Andrea Guevara-Morales Alejandro Rojo-Valerio Ingeniería DYNA tension thermoplastics Mechanical properties impact testing equipment Simulations of impact events in the automotive industry are now a common practice. Vehicle crashworthiness simulations on plastic components cover a wide range of strain rates from 0.01-500 s-1. Because plastic mechanical properties are very dependent on strain rate, developing experimental methods for generating stress-strain curves at this strain rate range is of great technological importance. In this paper, a modified Charpy machine capable of acquiring useful information to obtain the stress-strain curve is presented. Strain rates between 300-400 s-1 were achieved. Three thermoplastics were tested: high-density polyethylene, polypropylene-copolymer and polypropylene-homopolymer. Impact simulations using LS-DYNA were performed using the acquired high-strain rates stress-strain curves and compared with experimental data. Simulations using stress-strain curves from quasi-static tests were also performed for comparison against high-speed. Very good agreement between the simulation and experimental results was found when the ASTM D1822 type S specimen was used for testing each material. 2020 artículo científico 0012-7353 https://www.redalyc.org/articulo.oa?id=49664596007 https://www.redalyc.org/journal/496/49664596007/ https://www.redalyc.org/journal/496/49664596007/html/ https://www.redalyc.org/journal/496/49664596007/49664596007.epub https://www.redalyc.org/journal/496/49664596007/movil 10.15446/dyna.v87n213.83469 en http://www.redalyc.org/revista.oa?id=496 Dyna application/pdf Universidad Nacional de Colombia Dyna (Colombia) Num.213 Vol.87 |
| title | Modification of Charpy machine for the acquisition of stress-strain curve in thermoplastics |
| topic | Ingeniería DYNA tension thermoplastics Mechanical properties impact testing equipment |
| url | https://www.redalyc.org/articulo.oa?id=49664596007 https://www.redalyc.org/journal/496/49664596007/ https://www.redalyc.org/journal/496/49664596007/html/ https://www.redalyc.org/journal/496/49664596007/49664596007.epub https://www.redalyc.org/journal/496/49664596007/movil |