Eddy current modeling in linear and nonlinear multifilamentary composite materials

Abstract In this work, a numerical model is developed for a rapid computation of eddy currents in composite materials, adaptable for both carbon fiber reinforced polymers (CFRPs) for NDT applications and multifilamentary high temperature superconductive (HTS) tapes for AC loss evaluation. The proposed model is based on an integro-differential formulation in terms of the electric vector potential in the frequency domain. The high anisotropy and the nonlinearity of the considered materials are easily handled in the frequency domain.

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A Review of Damage Tolerant Design, Certification and Repair in Metals Compared to Composite Materials

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.891-892.1597 ◽

2014 ◽

Vol 891-892 ◽

pp. 1597-1602 ◽

Cited By ~ 1

Author(s):

Nabil Chowdhury ◽

Wing Kong Chiu ◽

John Wang

Keyword(s):

Composite Materials ◽

Composite Structures ◽

Failure Modes ◽

Structural Integrity ◽

Fiber Reinforced Polymers ◽

Carbon Fiber Reinforced Polymers ◽

Reinforced Polymers ◽

Repair Efficiency ◽

Mechanically Fastened ◽

Damage Tolerant

A review of some of the various fatigue models introduced over the years for both metallic materials, in particular aluminium alloys followed by fatigue and durability concerns associated with composite materials. The move towards light weight and high stiffness structures that have good fatigue durability and corrosion resistance has led to the rapid move from metal structures to composite structures. With this brings the added concern of certifying new components as the damage mechanisms and failure modes in metals differ significantly than composite materials such as carbon fiber reinforced polymers (CFRP). The certification philosophy for composites must meet the same structural integrity, safety and durability requirements as that of metals. Hence this is where the challenge now lies. Substantial work has been conducted in the reparability of composite structures through bonding using various adherend thicknesses and joint types and has been shown to have higher durability than mechanically fastened repairs for thin adherends however these are currently unacceptable repair methods as they cannot be certified. Repairs are designed on the basis that the repair efficiency can be predicted and should be designed conservatively with respect to the various failure modes and include the surrounding structure.

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A structural chemistry look at composites recycling

Materials Horizons ◽

10.1039/d0mh01085e ◽

2020 ◽

Vol 7 (10) ◽

pp. 2479-2486

Author(s):

Carlos A. Navarro ◽

Cassondra R. Giffin ◽

Boyang Zhang ◽

Zehan Yu ◽

Steven R. Nutt ◽

...

Keyword(s):

Composite Materials ◽

Carbon Fiber ◽

Large Scale ◽

Civil Engineering ◽

Structural Materials ◽

Structural Chemistry ◽

Fiber Reinforced Polymers ◽

Engineering Applications ◽

Carbon Fiber Reinforced Polymers ◽

Reinforced Polymers

Composite materials, especially carbon fiber-reinforced polymers, are a class of structural materials now commonly used in aircraft, marine, and other applications, with emerging large-scale use in the automotive and civil engineering applications.

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