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Luterbacher, R. (author), Bond, I.P. (author), Trask, R.S. (author)
Locally stiffened or ‘stringer’ - skin composite structures are extensively used for lightweight applications in the aerospace industry. Due to localised stiffening, stress concentrations arise which can initiate damage e.g. debonding or delamination, within the composite structure. Critically, this damage can propagate under fatigue loading...
conference paper 2013
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Lafont, U. (author), Van Zeijl, H. (author), Van der Zwaag, S. (author)
In this work, we investigate the formation of self-healing systems that are able to recover more than once more than one (mechanical or other physical) functionality. To this aim composites were created consisting of a polysulfide thermoset rubber matrix having intrinsic self-healing properties filled with thermally/electrically conductive...
conference paper 2013
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Zheludkevich, M.L. (author), Tedim, J. (author), Ferreira, M.G.S. (author)
Abstract only.
conference paper 2013
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Wiktor, V.A.C. (author), Sangadji, S. (author), Jonkers, H.M. (author), Schlangen, H.E.J.G. (author)
Bacterially induced calcium carbonate precipitation has received considerable attention for its potential application in enforcing or repairing construction material. The mechanism of bacterially mediated calcite precipitation in those studies is primarily based on the enzymatic hydrolysis of urea. Besides calcite precipitation, this reaction...
conference paper 2013
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Palin, D. (author), Wiktor, V. (author), Jonkers, H.M. (author)
Marine concrete structures are exposed to one of the most hostile of natural environments. Many physical and chemical phenomena are usually interdependent and mutually reinforcing in the deterioration of marine exposed concrete: expansion and microcracking due to physical effects increases concrete permeability paving the way for harmful...
conference paper 2013
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Liu, Z. (author), Besseling, N.A.M. (author), Mendes, E. (author), Picken, S.J. (author)
Polyborosiloxanes (PBSs) are viscoelastic, transparent, colourless, self-healable polymer matrices, synthesized by reacting linear polydimethylsiloxanes (PDMSs) with boric acid (BA) above 150°C. BA takes part not only in cleaving the PDMS chains, but also contributes boronic-acid like moieties to the cleaved chain ends, which provide...
conference paper 2013
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Pingkarawat, K. (author), Wang, C.H. (author), Varley, R.J. (author), Mouritz, A.P. (author)
This paper presents an investigation into the delamination toughening and selfhealing properties of carbon-epoxy laminates using through-thickness stitches of mendable thermoplastic (poly[ethylene-co-(methacrylic acid)]). The effect of increasing stitch density on the improvement to the interlaminar fracture toughness and healing of mode I...
conference paper 2013
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Narayanasamy, R. (author), Alvarado, A. (author), Sanchez Medrano, J. (author), Betancourt Hernandez, J. (author), Balagurusamy, N. (author)
Sustainability or environment friendly green technology is based on the use of agents of biological origin that can mimic nature in their process applications. The production and use of conventional Portland cement is significant contributor to emission of greenhouse gases and the resultant global warming. Microbial induced carbonate...
conference paper 2013
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Boatemaa, L. (author), Zhou, J. (author), Van der Zwaag, S. (author), Sloof, W.G. (author)
Structural ceramics like alumina are usually brittle and sensitive to flaws leading to a reduction in their mechanical properties. This situation is worsened by machining prior to service and during service by contact, which introduces micro cracks and hidden damages. Crack damage can easily be developed in such ceramics when loaded, which often...
conference paper 2013
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Su, J.F. (author), Qiu, J. (author), Schlangen, H.E.J.G. (author)
Preservation and renovation bitumen of pavement is a big problem for the whole world. Traditionally, application rejuvenators is the only one method that can restore the original properties of the pavements. However, some puzzles still restrict its successful usage. Microencapsulation is a promising method to apply rejuvenator in bitumen. These...
conference paper 2013
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White, S.R. (author), Gladman, A.S. (author), Celestine, A.D. (author), Moore, J.S. (author), Sottos, N.R. (author)
Abstract only.
conference paper 2013
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Ducasse-Lapeyrusse, J. (author), Gagné, R. (author), Lors, C. (author), Damidot, D. (author)
Bio-healing is a promising approach to enhancing natural self-healing and thus completely heal large micro-cracks (> 200 ?m) in cementitious materials. The aim of this research is to better understand bio-healing of cementitious materials in order to accelerate the healing kinetics and maximize sealing efficiency of large micro-cracks. The bio...
conference paper 2013
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Hövelmann, C.H. (author), Gold, B. (author), Brás, A. (author), Allgaier, J. (author), Pyckhout-Hintzen, W. (author), Wischnewski, A. (author), Richter, D. (author)
Nature uses a combination of dynamic hydrogen bonds and static covalent bonds in e.g. the muscle sarcomer to achieve toughness in otherwise elastic materials. The dynamic bonds can open when a force is applied, thereby providing a stress-relieve mechanism to prevent rupturing of the covalent links. Upon release of external force the hydrogen...
conference paper 2013
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Zhang, M.Q. (author), Rong, M.Z. (author)
Autonomic self-healing thermosetting polymers or elastomers have been substantially studied, in which polymerization of the healing agents released from pre-embedded capsules serves as the key issue. As for thermoplastics, another major class of polymeric materials, however, researches on their self-healing approaches are less reported. Here in...
conference paper 2013
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Pauli, A. (author), Schmets, A.J.M. (author), Kasbergen, C. (author), Varveri, K. (author), Scarpas, A. (author)
Bituminous materials form a class of materials that possess the intrinsic ability to selfheal. This self-healing capability is evidenced by the observation that the service life of these materials ‘in the field’ exceeds the service life as predicted by standard mechanical laboratory tests. This mismatch between laboratory prediction and field...
conference paper 2013
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Hart, K.R. (author), Wetzel, E.D. (author), Sottos, N.R. (author), White, S.R. (author)
Abstract only.
conference paper 2013
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Zhang, M. (author), Han, N. (author), Xing, F. (author), Wang, X. (author), Schlangen, H.E.J.G. (author)
An international cooperation research project has been financially supported by China Nature Science Foundation, which consists of three relatively independent, but strategically integrated research sub-programs, aiming at the formation of a selfhealing system based on the microcapsule principle for the cementitious composites. In this paper, a...
conference paper 2013
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Chen, Y. (author), Kushner, A.M. (author), Williams, G.A. (author), Hentschel, J. (author), Guan, Z. (author)
Abstract only.
conference paper 2013
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Sangadji, S. (author), Wiktor, V.A.C. (author), Jonkers, H.M. (author), Schlangen, H.E.J.G. (author)
Bacteria induced calcite precipitation has been proven to be effective in making concrete structure self-healing. In Microlab TU Delft, the concept has been enhanced by developing a liquid bacteria-based concrete repair system. The solution contains calcite precipitating bacteria, nutrients and buffer compound which may demonstrate high...
conference paper 2013
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Teixeira, R.F.A. (author), Nguyen, L.T. (author), Du Prez, F.E. (author)
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conference paper 2013
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