TY - JOUR
T1 - Modeling of the anisotropic thermal conductivity of fabrics embedded in a thermoplastic matrix system
AU - Längauer, Manuel
AU - Brunnthaller, Franz
AU - Zitzenbacher, Gernot
AU - Burgstaller, Christoph
AU - Hochenauer, Christoph
N1 - Publisher Copyright:
© 2021 The Authors. Polymer Composites published by Wiley Periodicals LLC. on behalf of Society of Plastics Engineers.
PY - 2021/4
Y1 - 2021/4
N2 - Processing of thermoplastic composites is increasingly gaining importance due to their excellent mechanical properties combined with their recycling-feasibility. However, distinguishing anisotropic thermal properties of these materials make process simulation challenging. This work deals with an alternative way of analytical modeling of the anisotropic thermal conductivity of fabrics embedded in a thermoplastic matrix, as in the case of sheets for thermoforming applications, in which heating times are often process limiting. By creation of a unit cell and applying heat flux balances, the thermal conductivity in the fiber direction and in the transversal direction can be calculated. The transversal direction is the most important factor for the addressed thermoforming applications. The proposed model is then successfully validated through Hot Disk measurements of glass fiber reinforced polyamide sheets. Furthermore, authentication is reached by the comparison to measured thermal conductivity values from another study. Hence, it can be shown that the model proves to be more accurate than existing analytical models.
AB - Processing of thermoplastic composites is increasingly gaining importance due to their excellent mechanical properties combined with their recycling-feasibility. However, distinguishing anisotropic thermal properties of these materials make process simulation challenging. This work deals with an alternative way of analytical modeling of the anisotropic thermal conductivity of fabrics embedded in a thermoplastic matrix, as in the case of sheets for thermoforming applications, in which heating times are often process limiting. By creation of a unit cell and applying heat flux balances, the thermal conductivity in the fiber direction and in the transversal direction can be calculated. The transversal direction is the most important factor for the addressed thermoforming applications. The proposed model is then successfully validated through Hot Disk measurements of glass fiber reinforced polyamide sheets. Furthermore, authentication is reached by the comparison to measured thermal conductivity values from another study. Hence, it can be shown that the model proves to be more accurate than existing analytical models.
KW - anisotropic properties
KW - modeling
KW - thermal conductivity
KW - thermoforming applications
KW - thermoplastic composites
UR - http://www.scopus.com/inward/record.url?scp=85099940830&partnerID=8YFLogxK
U2 - 10.1002/pc.25958
DO - 10.1002/pc.25958
M3 - Article
AN - SCOPUS:85099940830
SN - 0272-8397
VL - 42
SP - 2050
EP - 2060
JO - Polymer Composites
JF - Polymer Composites
IS - 4
ER -