Deep drawing of fabric‐reinforced thermoplastics: Wrinkle formation and their reduction

U. Breuer; M. Neitzel; V. Ketzer; R. Reinicke

doi:10.1002/pc.10655

journal article Aug 01, 1996

Deep drawing of fabric‐reinforced thermoplastics: Wrinkle formation and their reduction

U. Breuer M. Neitzel V. Ketzer R. Reinicke

Polymer Composites Vol. 17 No. 4 pp. 643-647 · Wiley

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Abstract

AbstractProducing highly stiff and strong thin‐walled fabric‐reinforced parts for mass application can be economic using a double‐belt press to consolidate thermoplastic sheet and a hydraulic press for non‐isothermal stamp forming in a second step. During stamp forming, undesired wrinkle formation can occur at sites of three dimensional forming. To understand the mechanisms of wrinkle formation, shear tests were performed with different types of reinforcing glass and carbon fabric, both dry and impregnated with a polyamide (PA12) matrix. Evidence has been found that wrinkle formation during fabric shear is strongly dependent on membrane stresses within the fabric. High membrane stresses of ∼20 MPa can prevent wrinkling even at high shear angles of ∼60°. These stresses can be generated during stamp forming by means of blank holders. A new flexible roller tracking device has successfully been installed on a stamp forming pilot plant. It was possible to form chests sized 450 mm. 300 mm. 40 mm (w. l. d) free of wrinkles with a 4‐ply glass plain weave fabric preimpregnated with polyamide matrix (PA12) and a fiber content of 45 vol%.

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References

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Metrics

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Citations

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References

Details

Published: Aug 01, 1996
Vol/Issue: 17(4)
Pages: 643-647
License: View

Authors

Cite This Article

U. Breuer, M. Neitzel, V. Ketzer, et al. (1996). Deep drawing of fabric‐reinforced thermoplastics: Wrinkle formation and their reduction. Polymer Composites, 17(4), 643-647. https://doi.org/10.1002/pc.10655

Deep drawing of fabric‐reinforced thermoplastics: Wrinkle formation and their reduction

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