Load transfer through chain molecules after interpenetration at interfaces

Jud, K.; Kausch, H. H.

doi:10.1007/bf00255445

Cited by 141 publications

(47 citation statements)

References 3 publications

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“…[4][5][6][7][8][9][10][11][12][13][14][15] While these previous works were successful in repairing or sealing cracks, the healing was not self-initiated and required some form of manual intervention (e.g. application of heat, solvents, or healing agents).…”

Section: Fig 2-self-healing Concept For a Thermosetting Polymermentioning

confidence: 99%

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Fracture testing of a self-healing polymer composite

Brown¹,

Sottos²,

White³

2002

Experimental Mechanics

549

239

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Inspired by biological systems in which damage triggers an autonomic healing response, we have developed a polymer composite material that can heal itself when cracked. This paper summarizes the self-healing concept for polymeric composite materials and investigates fracture mechanics issues consequential to the development and optimization of this new class of materials. The self-healing material under investigation is an epoxy matrix composite, which incorporates a microencapsulated healing agent that is released upon crack intrusion. Polymerization of the healing agent is triggered by contact with an embedded catalyst. The effects of size and concentration of catalyst and microcapsules on fracture toughness and healing efficiency are investigated.

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Section: Fig 2-self-healing Concept For a Thermosetting Polymermentioning

confidence: 99%

“…This time was chosen to ensure sufficient time for healing. Previous research on healing of thermoplastics 4,10,11 showed that healing efficiency is strongly tied to time. A series of 28 in situ samples was manufactured with 10 wt% of 180 µm diameter capsules and 2.5 wt% of catalyst.…”

Section: Development Of Healing Efficiencymentioning

confidence: 99%

Fracture testing of a self-healing polymer composite

Brown¹,

Sottos²,

White³

2002

Experimental Mechanics

549

239

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“…Kausch and collaborators [17][18][19][20][21] have previously reported that crack healing of amorphous polymers slightly above T. involves diffusion of macromolecules across the inter~ace; their fracture mechanics experiments have clearly shown that there is a linear proportionality between the square of the fracture toughness Kii of the rehealed crack zone and the square root of the rehealing time tp. It was quite possible to explain the observed time and temperature-dependence of Kii by a diffusion model of chain interpenetration [18][19][20].…”

Section: Crack Healingmentioning

confidence: 99%

On some mechanical effects in glassy polymers attributed to chain entanglements

Kausch

Dettenmaier

1982

Colloid & Polymer Sci

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“…On the one hand, there are intrinsic self-healing polymers based on a matrix that can repair damage due to cracks by itself under a certain stimulation (Jud et al, 1981;Jud and Kausch, 1979;Meure et al, 2009;Raghavan and Wool, 1999), mostly heating. Currently, most of these self-healing polymers cannot heal themselves without an external intervention.…”

Section: Introductionmentioning

confidence: 99%

In-depth numerical analysis of the TDCB specimen for characterization of self-healing polymers

Gómez

Gilabert

Tsangouri

et al. 2015

International Journal of Solids and Structures

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Abstract. The Tapered Double Cantilever Beam (TDCB) is the common specimen to study self-healing thermosetting polymers. While this geometry allows characterizing the mode I fracture toughness without taking into account the crack length, the experiments show an important dispersion and unstable behaviour that must be taken into account to obtain accurate results. In this paper, finite element simulations have been used to understand the experimental behaviour. Static simulations with a 2 stationary crack give the local stresses and the stress intensity factors at the crack tip when the TDCB is under load. In addition, the eXtendend Finite Element Method (XFEM) has been used to make quasi-static crack propagation simulations. The results indicate that the crack tip has a curved profile during the propagation, advancing more at the edges than at the centre. The crack propagation begins when the applied load reaches a critical value. The unstable crack propagation noted in the experiments can be reproduced by introducing an unstable behaviour in the simulations. Finally, the sensitivity of the critical load has been studied as a function of the friction between pin and hole, tolerance of geometrical dimensions, and cracks out of the symmetric plane. The results can partially explain the dispersion of the experimental data.

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Load transfer through chain molecules after interpenetration at interfaces

Cited by 141 publications

References 3 publications

Fracture testing of a self-healing polymer composite

Fracture testing of a self-healing polymer composite

On some mechanical effects in glassy polymers attributed to chain entanglements

In-depth numerical analysis of the TDCB specimen for characterization of self-healing polymers

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