Compressive damage in three-axis woven thermoplastic composites

Wen Shyong Kuo, Tse Hao Ko, Yui-Chuin Shiah

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

This work examines compression-induced damage in a three-dimensional woven carbon/Nylon 6 composite. A carbon yarn commingled with Nylon 6 powder was used to make the woven fabric, which has a 3-axis orthogonal yarn structure in the interior. The fabric was hot-pressed along the thickness direction to form the three-dimensional thermoplastic composites. A matched mold was designed for hot-pressing the composites into a fixed thickness. The influence of the molding temperature on the compressive strength was studied. The compressive tests were conducted using an end-supported, end-loaded fixture. The induced damage modes inside the composite were observed. The major mode of damage is a miniscopic kink-band, in which axial yarns tend to buckle as a whole. The miniscopic kink-band contains a number of smaller modes of damage, such as microscopic fiber buckling, yarn deflection, yarn debonding, yarn split, and shear deformation in transverse yarns. The miniscopic kink-band is inclined at 45° to the loading direction, suggesting that the compression-induced, through-thickness shear is the cause of failure. Even under excessive strain, the specimen showed no breaking apart and was still able to resist the load. The roles of the through-thickness yarns and the 3D structure in the damage mechanisms are discussed.

Original languageEnglish
Pages (from-to)357-373
Number of pages17
JournalJournal of Thermoplastic Composite Materials
Volume19
Issue number4
DOIs
Publication statusPublished - 2006 Jul 1

Fingerprint

yarns
Thermoplastics
Yarn
damage
composite materials
kink bands
Composite materials
Nylon (trademark)
Carbon
shear
fixtures
hot pressing
carbon
compressive strength
Debonding
Hot pressing
buckling
Molding
Powders
Shear deformation

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Condensed Matter Physics

Cite this

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Compressive damage in three-axis woven thermoplastic composites. / Kuo, Wen Shyong; Ko, Tse Hao; Shiah, Yui-Chuin.

In: Journal of Thermoplastic Composite Materials, Vol. 19, No. 4, 01.07.2006, p. 357-373.

Research output: Contribution to journalArticle

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