Effect of fiber cross section geometry on cyclic plastic behavior of continuous fiber reinforced aluminum matrix composites

Dario Giugliano, Daniele Barbera, Haofeng Chen

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10 Citations (Scopus)

Abstract

This paper investigates the cyclic plastic behavior of continuous fiber-reinforced aluminum matrix composites (CFAMCs) with different shape of fiber cross section arranged in a square packing geometry. The 2D micromechanical FEM models, composed of elastic undamaged reinforcement perfectly bonded to an elastic-perfectly plastic matrix with a volume fraction equal to 30%, are subjected to off-axis constant macro stress and a cyclic temperature history. under such load conditions, the matrix undergoes large internal inelastic deformations potentially leading to internal crack initiation as well as macroscopic ratcheting. The computational method, the Linear Matching Method (LMM), is used throughout the analysis for the direct evaluation of shakedown, alternating plasticity and ratcheting behaviors. The effect of the matrix yield stress thermal degradation upon two common design limits, i.e., the reverse plasticity limit and the ratchet limit, is also investigated and discussed, including its influence on the off-axis low cycle fatigue crack initiation.
LanguageEnglish
Article numberEJMSOL_3346
JournalEuropean Journal of Mechanics - A/Solids
Early online date4 Sep 2016
DOIs
Publication statusE-pub ahead of print - 4 Sep 2016

Fingerprint

Aluminum
plastics
Plastics
aluminum
composite materials
fibers
Geometry
Fibers
crack initiation
cross sections
Composite materials
matrices
geometry
Crack initiation
plastic properties
Plasticity
thermal degradation
Computational methods
reinforcement
Yield stress

Keywords

  • shakedown
  • cyclic plasticity
  • metal matrix composites
  • cyclic plastic behavior
  • fiber-reinforced aluminum
  • ratcheting behaviors
  • thermal degradation
  • fatigue crack
  • linear matching methods

Cite this

@article{6d681ef1a6b04b06ad43b8aac3f69cdb,
title = "Effect of fiber cross section geometry on cyclic plastic behavior of continuous fiber reinforced aluminum matrix composites",
abstract = "This paper investigates the cyclic plastic behavior of continuous fiber-reinforced aluminum matrix composites (CFAMCs) with different shape of fiber cross section arranged in a square packing geometry. The 2D micromechanical FEM models, composed of elastic undamaged reinforcement perfectly bonded to an elastic-perfectly plastic matrix with a volume fraction equal to 30{\%}, are subjected to off-axis constant macro stress and a cyclic temperature history. under such load conditions, the matrix undergoes large internal inelastic deformations potentially leading to internal crack initiation as well as macroscopic ratcheting. The computational method, the Linear Matching Method (LMM), is used throughout the analysis for the direct evaluation of shakedown, alternating plasticity and ratcheting behaviors. The effect of the matrix yield stress thermal degradation upon two common design limits, i.e., the reverse plasticity limit and the ratchet limit, is also investigated and discussed, including its influence on the off-axis low cycle fatigue crack initiation.",
keywords = "shakedown, cyclic plasticity, metal matrix composites, cyclic plastic behavior, fiber-reinforced aluminum, ratcheting behaviors, thermal degradation, fatigue crack, linear matching methods",
author = "Dario Giugliano and Daniele Barbera and Haofeng Chen",
year = "2016",
month = "9",
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language = "English",
journal = "European Journal of Mechanics - A/Solids",
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AU - Giugliano, Dario

AU - Barbera, Daniele

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N2 - This paper investigates the cyclic plastic behavior of continuous fiber-reinforced aluminum matrix composites (CFAMCs) with different shape of fiber cross section arranged in a square packing geometry. The 2D micromechanical FEM models, composed of elastic undamaged reinforcement perfectly bonded to an elastic-perfectly plastic matrix with a volume fraction equal to 30%, are subjected to off-axis constant macro stress and a cyclic temperature history. under such load conditions, the matrix undergoes large internal inelastic deformations potentially leading to internal crack initiation as well as macroscopic ratcheting. The computational method, the Linear Matching Method (LMM), is used throughout the analysis for the direct evaluation of shakedown, alternating plasticity and ratcheting behaviors. The effect of the matrix yield stress thermal degradation upon two common design limits, i.e., the reverse plasticity limit and the ratchet limit, is also investigated and discussed, including its influence on the off-axis low cycle fatigue crack initiation.

AB - This paper investigates the cyclic plastic behavior of continuous fiber-reinforced aluminum matrix composites (CFAMCs) with different shape of fiber cross section arranged in a square packing geometry. The 2D micromechanical FEM models, composed of elastic undamaged reinforcement perfectly bonded to an elastic-perfectly plastic matrix with a volume fraction equal to 30%, are subjected to off-axis constant macro stress and a cyclic temperature history. under such load conditions, the matrix undergoes large internal inelastic deformations potentially leading to internal crack initiation as well as macroscopic ratcheting. The computational method, the Linear Matching Method (LMM), is used throughout the analysis for the direct evaluation of shakedown, alternating plasticity and ratcheting behaviors. The effect of the matrix yield stress thermal degradation upon two common design limits, i.e., the reverse plasticity limit and the ratchet limit, is also investigated and discussed, including its influence on the off-axis low cycle fatigue crack initiation.

KW - shakedown

KW - cyclic plasticity

KW - metal matrix composites

KW - cyclic plastic behavior

KW - fiber-reinforced aluminum

KW - ratcheting behaviors

KW - thermal degradation

KW - fatigue crack

KW - linear matching methods

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