Autor(es):
Barbosa, Carlos N. 
; Viana, Júlio C. ; Franzen, Markus ; Simões, Ricardo
Data: 2012
Identificador Persistente: http://hdl.handle.net/11110/305
Origem: CiencIPCA
Assunto(s): Mechanical Properties
Detalhes do Documento
Effect of the Impact Conditions on the Mechanical Properties of Injection-Molde...
Descrição
This work focused on the study of the impact event on molded parts in the framework of automotive components. The influence of the impact conditions and processing parameters on the mechanical behavior of talc-filled polypropylene specimens was analyzed. The specimens were lateral-gate discs produced by injection molding, and the mechanical characterization was performed through instrumented falling weight impact tests concomitantly assisted with high-speed videography. Results analyzed using the analysis of variance (ANOVA) method have shown that from the considered parameters, only the dart diameter and test temperature have significant influence on the falling weight impact properties. Higher dart diameter leads to higher peak force and peak energy results. Conversely, higher levels of test temperatures lead to lower values of peak force and peak energy. By means of high-speed videography, a more brittle fracture was observed for experiments with higher levels of test velocity and dart diameter and lower levels of test temperature. The injection-molding process conditions assessed in this study have an influence on the impact response of moldings, mainly on the deformation capabilities of the moldings. Foundation for Science and Technology, Lisbon, through the 38 Quadro Comunita´rio de Apoio, the POCTI and FEDER programs, and project PEst-C/CTM/LA0025/2011.
This work focused on the study of the impact event on molded parts in the framework of automotive components. The influence of the impact conditions and processing parameters on the mechanical behavior of talc-filled polypropylene specimens was analyzed. The specimens were lateral-gate discs produced by injection molding, and the mechanical characterization was performed through instrumented falling weight impact tests concomitantly assisted with high-speed videography. Results analyzed using the analysis of variance (ANOVA) method have shown that from the considered parameters, only the dart diameter and test temperature have significant influence on the falling weight impact properties. Higher dart diameter leads to higher peak force and peak energy results. Conversely, higher levels of test temperatures lead to lower values of peak force and peak energy. By means of high-speed videography, a more brittle fracture was observed for experiments with higher levels of test velocity and dart diameter and lower levels of test temperature. The injection-molding process conditions assessed in this study have an influence on the impact response of moldings, mainly on the deformation capabilities of the moldings. Foundation for Science and Technology, Lisbon, through the 38 Quadro Comunita´rio de Apoio, the POCTI and FEDER programs, and project PEst-C/CTM/LA0025/2011.
Tipo de Documento
Artigo
Idioma Inglês
Idioma Inglês
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