Deformation mechanism in compression molding of discontinuous thermoplastic composites

Research output: Contribution to conferencePaperAcademicpeer-review

19 Downloads (Pure)

Abstract

Processing plays a key role in determining the final properties of the product during compression molding of thermoplastic composites. In order to manufacture defect free composite products, the essential material behavior needs to be identified, modeled and characterized. This work focuses on the experimental determination of those mechanisms, that play an important role during the manufacturing of compression molded products. Chopped tapes of unidirectional carbon fiber reinforced thermoplastic composite are used for the compression molding experiments with different processing conditions. A transparent matrix is used with un-impregnated tows to visualize the deformation of flakes and movement of fluid. Experiments reveal that intra flake shear, in plane deformation of flakes (flake spreading, fiber bending) and fiber matrix separation are the dominant mechanisms. These mechanisms also show dependence on physical parameters like fiber volume fraction and fiber orientation.

Fingerprint

Compression molding
Thermoplastics
Fibers
Composite materials
Fiber reinforced materials
Processing
Tapes
Carbon fibers
Volume fraction
Compaction
Experiments
Defects
Fluids

Cite this

Ali, W., Rasheed, M. I. A., Sachs, U., Geijselaers, H. J. M., & Akkerman, R. (2018). Deformation mechanism in compression molding of discontinuous thermoplastic composites. Paper presented at 14th International Conference on Flow Processes in Composite Materials, FPCM-14-2018, Luleå, Sweden.
Ali, W. ; Rasheed, M.I.A. ; Sachs, U. ; Geijselaers, H.J.M. ; Akkerman, R. / Deformation mechanism in compression molding of discontinuous thermoplastic composites. Paper presented at 14th International Conference on Flow Processes in Composite Materials, FPCM-14-2018, Luleå, Sweden.2 p.
@conference{d9fc1a091bf84d969ade6a98e53e34c1,
title = "Deformation mechanism in compression molding of discontinuous thermoplastic composites",
abstract = "Processing plays a key role in determining the final properties of the product during compression molding of thermoplastic composites. In order to manufacture defect free composite products, the essential material behavior needs to be identified, modeled and characterized. This work focuses on the experimental determination of those mechanisms, that play an important role during the manufacturing of compression molded products. Chopped tapes of unidirectional carbon fiber reinforced thermoplastic composite are used for the compression molding experiments with different processing conditions. A transparent matrix is used with un-impregnated tows to visualize the deformation of flakes and movement of fluid. Experiments reveal that intra flake shear, in plane deformation of flakes (flake spreading, fiber bending) and fiber matrix separation are the dominant mechanisms. These mechanisms also show dependence on physical parameters like fiber volume fraction and fiber orientation.",
author = "W. Ali and M.I.A. Rasheed and U. Sachs and H.J.M. Geijselaers and R. Akkerman",
year = "2018",
month = "5",
day = "30",
language = "English",
note = "14th International Conference on Flow Processes in Composite Materials, FPCM-14-2018, FPCM 2018 ; Conference date: 30-05-2014 Through 01-06-2018",
url = "https://www.ltu.se/research/subjects/Stromningslara/Konferenser/FPCM-14?l=en, https://www.ltu.se/research/subjects/Stromningslara/Konferenser/FPCM-14/14th-International-Conference-on-Flow-Processes-in-Composite-Materials-30-May-1-June-2018-1.161800?l=en",

}

Ali, W, Rasheed, MIA, Sachs, U, Geijselaers, HJM & Akkerman, R 2018, 'Deformation mechanism in compression molding of discontinuous thermoplastic composites' Paper presented at 14th International Conference on Flow Processes in Composite Materials, FPCM-14-2018, Luleå, Sweden, 30/05/14 - 1/06/18, .

Deformation mechanism in compression molding of discontinuous thermoplastic composites. / Ali, W.; Rasheed, M.I.A.; Sachs, U.; Geijselaers, H.J.M.; Akkerman, R.

2018. Paper presented at 14th International Conference on Flow Processes in Composite Materials, FPCM-14-2018, Luleå, Sweden.

Research output: Contribution to conferencePaperAcademicpeer-review

TY - CONF

T1 - Deformation mechanism in compression molding of discontinuous thermoplastic composites

AU - Ali, W.

AU - Rasheed, M.I.A.

AU - Sachs, U.

AU - Geijselaers, H.J.M.

AU - Akkerman, R.

PY - 2018/5/30

Y1 - 2018/5/30

N2 - Processing plays a key role in determining the final properties of the product during compression molding of thermoplastic composites. In order to manufacture defect free composite products, the essential material behavior needs to be identified, modeled and characterized. This work focuses on the experimental determination of those mechanisms, that play an important role during the manufacturing of compression molded products. Chopped tapes of unidirectional carbon fiber reinforced thermoplastic composite are used for the compression molding experiments with different processing conditions. A transparent matrix is used with un-impregnated tows to visualize the deformation of flakes and movement of fluid. Experiments reveal that intra flake shear, in plane deformation of flakes (flake spreading, fiber bending) and fiber matrix separation are the dominant mechanisms. These mechanisms also show dependence on physical parameters like fiber volume fraction and fiber orientation.

AB - Processing plays a key role in determining the final properties of the product during compression molding of thermoplastic composites. In order to manufacture defect free composite products, the essential material behavior needs to be identified, modeled and characterized. This work focuses on the experimental determination of those mechanisms, that play an important role during the manufacturing of compression molded products. Chopped tapes of unidirectional carbon fiber reinforced thermoplastic composite are used for the compression molding experiments with different processing conditions. A transparent matrix is used with un-impregnated tows to visualize the deformation of flakes and movement of fluid. Experiments reveal that intra flake shear, in plane deformation of flakes (flake spreading, fiber bending) and fiber matrix separation are the dominant mechanisms. These mechanisms also show dependence on physical parameters like fiber volume fraction and fiber orientation.

M3 - Paper

ER -

Ali W, Rasheed MIA, Sachs U, Geijselaers HJM, Akkerman R. Deformation mechanism in compression molding of discontinuous thermoplastic composites. 2018. Paper presented at 14th International Conference on Flow Processes in Composite Materials, FPCM-14-2018, Luleå, Sweden.