In injection moulding processes, the melt undergoes a complex deformation and cooling history, which results in an inhomogeneous distribution of crystalline superstructures in semi-crystalline thermoplastics, which significantly influences their final mechanical and thermal properties. In this paper we describe the determination of local effective thermal properties of a moulded part via a multiscale simulation approach. First a macroscopic filling and heat transfer simulation is performed followed by a microstructure evolution calculation on the micro-scale. Then, the effective thermal properties are derived via a two-level homogenization scheme. The results show that the effective thermal conductivity is anisotropic and that it varies asymmetrically over the analysed plate sections.

Effective thermal properties of an isotactic polypropylene (α‐iPP) injection moulded part by a multiscale approach / Laschet, G.; Apel, M.; Wipperfürth, J; Hopmann, C; Spekowius, M.; Spina, R. - In: MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK. - ISSN 0933-5137. - STAMPA. - 48:12(2017), pp. 1213-1219. [10.1002/mawe.201700148]

Effective thermal properties of an isotactic polypropylene (α‐iPP) injection moulded part by a multiscale approach

Spina R
2017-01-01

Abstract

In injection moulding processes, the melt undergoes a complex deformation and cooling history, which results in an inhomogeneous distribution of crystalline superstructures in semi-crystalline thermoplastics, which significantly influences their final mechanical and thermal properties. In this paper we describe the determination of local effective thermal properties of a moulded part via a multiscale simulation approach. First a macroscopic filling and heat transfer simulation is performed followed by a microstructure evolution calculation on the micro-scale. Then, the effective thermal properties are derived via a two-level homogenization scheme. The results show that the effective thermal conductivity is anisotropic and that it varies asymmetrically over the analysed plate sections.
2017
Effective thermal properties of an isotactic polypropylene (α‐iPP) injection moulded part by a multiscale approach / Laschet, G.; Apel, M.; Wipperfürth, J; Hopmann, C; Spekowius, M.; Spina, R. - In: MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK. - ISSN 0933-5137. - STAMPA. - 48:12(2017), pp. 1213-1219. [10.1002/mawe.201700148]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/160082
Citazioni
  • Scopus 6
  • ???jsp.display-item.citation.isi??? 5
social impact