Effect of the molding temperature and cooling time on the residual stresses of crystal polystyrene
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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional de Colombia
2014
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| _version_ | 1876458614652141568 |
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| author | María Teresa Acevedo-Morantes |
| author_facet | María Teresa Acevedo-Morantes |
| contents | Effect of the molding temperature and cooling time on the residual stresses of crystal polystyrene María Teresa Acevedo-Morantes María Brieva-Sarmiento Alvaro Realpe-Jiménez Ingeniería Polariscope photoelasticity residual stresses inje ction molding crystal polystyrene The use of crystal polystyrene for high performance components requires knowledge of the distribution of residual stresses. Th e aim of this research was to analyze the influence of the molding tempe rature and cooling time on the residual stresses present in par ts of two types of crystal polystyrene PS1 and PS2, processed by injectio n molding. The results obtained using photoelasticity showed that at low t emperatures the residual stresses increase due to the processes of formation and destruction of intermolecular forces. Internal stresses wer e reduced in the polymer specimens with greater thickness becau se the molecular relaxation of chains of polystyrene is facilitated by the space increase between the walls of the mold. It was concl uded that the photoelasticity technique can be applied effectively in the mea surement of residual stresses in injection molded crystal polys tyrene parts. 2014 artículo científico 0012-7353 https://www.redalyc.org/articulo.oa?id=49632363008 en http://www.redalyc.org/revista.oa?id=496 Dyna application/pdf Universidad Nacional de Colombia Dyna (Colombia) Num.187 Vol.81 |
| format | Artículo científico |
| id | redalyc_49632363008 |
| institution | Redalyc |
| language | en |
| publishDate | 2014 |
| publisher | Universidad Nacional de Colombia |
| spellingShingle | Effect of the molding temperature and cooling time on the residual stresses of crystal polystyrene María Teresa Acevedo-Morantes Ingeniería Polariscope photoelasticity residual stresses inje ction molding crystal polystyrene Effect of the molding temperature and cooling time on the residual stresses of crystal polystyrene María Teresa Acevedo-Morantes María Brieva-Sarmiento Alvaro Realpe-Jiménez Ingeniería Polariscope photoelasticity residual stresses inje ction molding crystal polystyrene The use of crystal polystyrene for high performance components requires knowledge of the distribution of residual stresses. Th e aim of this research was to analyze the influence of the molding tempe rature and cooling time on the residual stresses present in par ts of two types of crystal polystyrene PS1 and PS2, processed by injectio n molding. The results obtained using photoelasticity showed that at low t emperatures the residual stresses increase due to the processes of formation and destruction of intermolecular forces. Internal stresses wer e reduced in the polymer specimens with greater thickness becau se the molecular relaxation of chains of polystyrene is facilitated by the space increase between the walls of the mold. It was concl uded that the photoelasticity technique can be applied effectively in the mea surement of residual stresses in injection molded crystal polys tyrene parts. 2014 artículo científico 0012-7353 https://www.redalyc.org/articulo.oa?id=49632363008 en http://www.redalyc.org/revista.oa?id=496 Dyna application/pdf Universidad Nacional de Colombia Dyna (Colombia) Num.187 Vol.81 |
| title | Effect of the molding temperature and cooling time on the residual stresses of crystal polystyrene |
| topic | Ingeniería Polariscope photoelasticity residual stresses inje ction molding crystal polystyrene |
| url | https://www.redalyc.org/articulo.oa?id=49632363008 |