Dynamic micromechanical modeling of textile composites with cohesive interface failure

Ryan Karkkainen, Brandon McWilliams

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Micromechanical finite element modeling has been employed to investigate the failure of several compositionally varied textile composite materials under dynamic loading. A previously developed cohesive element failure model for interface strength is employed at the phase boundary between the fiber tows and the interstitial matrix to determine the effects of interface properties on the failure behavior of a 2D plain weave and 3D orthogonal weave S2 glass/BMI composite. Thus, tow pullout and separation have been included in addition to more classical micro-level failure modes such as fiber breakage and matrix microcracking. The dynamic response of a representative volume element (RVE) is determined at strain rates of 1000 and 10,000 strain/s in an explicit finite element formulation. A parametric study has investigated compositional effects on impact strengths of two weave geometries with a relatively 'strong' versus 'weak' interface property at 10,000 and 1000 strain/s in tension and compression. The successful implementation of the cohesive failure scheme into the textile RVE framework is shown, and fundamental macro-level failure cases are investigated to relate micromechanical parametric variation to consequent strength effects.

Original languageEnglish (US)
Pages (from-to)2203-2218
Number of pages16
JournalJournal of Composite Materials
Volume46
Issue number18
DOIs
StatePublished - Aug 2012
Externally publishedYes

Fingerprint

Textiles
Microcracking
Fibers
Composite materials
Phase boundaries
Impact strength
Failure modes
Dynamic response
Macros
Strain rate
Glass
Geometry

Keywords

  • interface failure
  • micromechanics
  • Textile composites

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Dynamic micromechanical modeling of textile composites with cohesive interface failure. / Karkkainen, Ryan; McWilliams, Brandon.

In: Journal of Composite Materials, Vol. 46, No. 18, 08.2012, p. 2203-2218.

Research output: Contribution to journalArticle

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