Constitutive modelling of UD reinforced thermoplastic laminates

Sebastiaan Haanappel, R.H.W. ten Thije, Remko Akkerman

Research output: Contribution to conferencePaper

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Abstract

Intra-ply shear is an important mechanism in thermoforming processes of UD fibre reinforced thermoplastic laminates. Various methods have been developed to characterise this shear mechanism, but measured properties differ for several orders of magnitude. The potential of another technique is shown in this paper. This approach considers a strip with a rectangular cross section, subjected to torsion. Several analyses have been carried out to determine the significant material properties for this loading mechanism. For clarity, isotropic and orthotropic elastic material behaviour was considered first. The response torque mainly depends on the in-plane shear modulus G12. An extension was made to the analysis of anisotropic viscous material behaviour. Closed form solutions and FE simulations were compared, using a fibre reinforced viscous fluid model. The torsional response of a partially clamped strip was highly influenced by the fibre stiffnesses. Nevertheless, it is possible to relate the longitudinal viscosity to a closed form solution directly, if bulging is not suppressed and constant through the length of the strip. A smart clamping design is therefore required.
Original languageUndefined
Publication statusPublished - 2010
Event10th International Conference on Flow Processes in Composite Materials, FPCM-10 2010 - Monte Verita, Ascona, Switzerland
Duration: 11 Jul 201015 Jul 2010
Conference number: 10

Conference

Conference10th International Conference on Flow Processes in Composite Materials, FPCM-10 2010
Abbreviated titleFPCM
CountrySwitzerland
CityAscona
Period11/07/1015/07/10

Keywords

  • IR-74777

Cite this

Haanappel, S., ten Thije, R. H. W., & Akkerman, R. (2010). Constitutive modelling of UD reinforced thermoplastic laminates. Paper presented at 10th International Conference on Flow Processes in Composite Materials, FPCM-10 2010, Ascona, Switzerland.
Haanappel, Sebastiaan ; ten Thije, R.H.W. ; Akkerman, Remko. / Constitutive modelling of UD reinforced thermoplastic laminates. Paper presented at 10th International Conference on Flow Processes in Composite Materials, FPCM-10 2010, Ascona, Switzerland.
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author = "Sebastiaan Haanappel and {ten Thije}, R.H.W. and Remko Akkerman",
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Haanappel, S, ten Thije, RHW & Akkerman, R 2010, 'Constitutive modelling of UD reinforced thermoplastic laminates' Paper presented at 10th International Conference on Flow Processes in Composite Materials, FPCM-10 2010, Ascona, Switzerland, 11/07/10 - 15/07/10, .

Constitutive modelling of UD reinforced thermoplastic laminates. / Haanappel, Sebastiaan; ten Thije, R.H.W.; Akkerman, Remko.

2010. Paper presented at 10th International Conference on Flow Processes in Composite Materials, FPCM-10 2010, Ascona, Switzerland.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Constitutive modelling of UD reinforced thermoplastic laminates

AU - Haanappel, Sebastiaan

AU - ten Thije, R.H.W.

AU - Akkerman, Remko

PY - 2010

Y1 - 2010

N2 - Intra-ply shear is an important mechanism in thermoforming processes of UD fibre reinforced thermoplastic laminates. Various methods have been developed to characterise this shear mechanism, but measured properties differ for several orders of magnitude. The potential of another technique is shown in this paper. This approach considers a strip with a rectangular cross section, subjected to torsion. Several analyses have been carried out to determine the significant material properties for this loading mechanism. For clarity, isotropic and orthotropic elastic material behaviour was considered first. The response torque mainly depends on the in-plane shear modulus G12. An extension was made to the analysis of anisotropic viscous material behaviour. Closed form solutions and FE simulations were compared, using a fibre reinforced viscous fluid model. The torsional response of a partially clamped strip was highly influenced by the fibre stiffnesses. Nevertheless, it is possible to relate the longitudinal viscosity to a closed form solution directly, if bulging is not suppressed and constant through the length of the strip. A smart clamping design is therefore required.

AB - Intra-ply shear is an important mechanism in thermoforming processes of UD fibre reinforced thermoplastic laminates. Various methods have been developed to characterise this shear mechanism, but measured properties differ for several orders of magnitude. The potential of another technique is shown in this paper. This approach considers a strip with a rectangular cross section, subjected to torsion. Several analyses have been carried out to determine the significant material properties for this loading mechanism. For clarity, isotropic and orthotropic elastic material behaviour was considered first. The response torque mainly depends on the in-plane shear modulus G12. An extension was made to the analysis of anisotropic viscous material behaviour. Closed form solutions and FE simulations were compared, using a fibre reinforced viscous fluid model. The torsional response of a partially clamped strip was highly influenced by the fibre stiffnesses. Nevertheless, it is possible to relate the longitudinal viscosity to a closed form solution directly, if bulging is not suppressed and constant through the length of the strip. A smart clamping design is therefore required.

KW - IR-74777

M3 - Paper

ER -

Haanappel S, ten Thije RHW, Akkerman R. Constitutive modelling of UD reinforced thermoplastic laminates. 2010. Paper presented at 10th International Conference on Flow Processes in Composite Materials, FPCM-10 2010, Ascona, Switzerland.