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Damage in Composite Structures: Notch Sensitivity

Kassapoglou, Christos

Composites have a significantly lower ability than metals to redistribute stresses around areas of stress concentrations or notches. Unlike metals where this stress redistribution is accomplished via yielding of the material around the notch, composites have limited stress redistribution by local damage creation. This damage is in the form of matrix cracks, delaminations, and limited fiber breakage. A damage or process zone is created which does not allow stresses in the vicinity of a notch to reach the values predicted by anisotropic elasticity. Understanding the creation and evolution of damage in composite structures requires the use of models that can cross several orders of magnitude from the micro to the meter scale.

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Damage in Composite Structures: Notch Sensitivity

Kassapoglou, Christos

Composites have a significantly lower ability than metals to redistribute stresses around areas of stress concentrations or notches. Unlike metals where this stress redistribution is accomplished via yielding of the material around the notch, composites have limited stress redistribution by local damage creation. This damage is in the form of matrix cracks, delaminations, and limited fiber breakage. A damage or process zone is created which does not allow stresses in the vicinity of a notch to reach the values predicted by anisotropic elasticity. Understanding the creation and evolution of damage in composite structures requires the use of models that can cross several orders of magnitude from the micro to the meter scale.

Damage in Composite Structures: Notch Sensitivity

Kassapoglou, Christos

Composites have a significantly lower ability than metals to redistribute stresses around areas of stress concentrations or notches. Unlike metals where this stress redistribution is accomplished via yielding of the material around the notch, composites have limited stress redistribution by local damage creation. This damage is in the form of matrix cracks, delaminations, and limited fiber breakage. A damage or process zone is created which does not allow stresses in the vicinity of a notch to reach the values predicted by anisotropic elasticity. Understanding the creation and evolution of damage in composite structures requires the use of models that can cross several orders of magnitude from the micro to the meter scale.

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Title:

Damage in Composite Structures: Notch Sensitivity

Contributors:

Kassapoglou, Christos (author)

Published in:

Modeling the Effect of Damage in Composite Structures ; 1-7

Publication date:

2015-03-16

Size:

7 pages

ISBN:

9781119013211 , 9781119013228

DOI:

https://doi.org/10.1002/9781119013228.ch1

Type of media:

Article/Chapter (Book)

Type of material:

Electronic Resource

Language:

English

Keywords:

damage zone , notch insensitivity , notch sensitivity , process zone , fiber breakage , multi‐scale modeling , delaminations , composites , matrix cracks , damage

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