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Larsson, R. (author), Mediavilla, J. (author), Fagerström, M. (author)
Through-the-thickness crack propagation in thin-walled structures is dealt with in this paper. The formulation is based on the cohesive zone concept applied to a kinematically consistent shell model enhanced with an XFEM-based discontinuous kinematical representation. The resulting formulation comprises the representation of continuous...
article 2011
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van der Voort, M.M. (author), Holm, K.B. (author), Kummer, P.O. (author), Teland, J.A. (author), van Doormaal, J.C.A.M. (author), Dijkers, H.P.A. (author)
An important blast injury mechanism is the rupture of the lungs and the gastrointestinal tract. In explosives safety studies and threat analysis the empirical model of Bowen is often used to quantify this mechanism. The original model predicts the lethality for a person in front of a reflecting surface caused by simple Friedlander blast waves....
article 2016
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Reinecke, E.A. (author), Huebert, T. (author), Tkatschenko, I. (author), Kessler, A. (author), Kuznetsov, M. (author), Wilkins, M. (author), Hedley, D. (author), Azkarate, I. (author), Proust, C. (author), Acosta-Iborra, B. (author), Gavrikov, B. (author), de Bruijn, P.C.J. (author), Marangon, A. (author), Teodorczyk, A. (author), Grafwallner, A. (author)
In the area of hydrogen safety, research facilities are essential for the experimental investigation of relevant phenomena, for testing devices and safety concepts, as well as for the generation of validation data for the various numerical codes and models. Within the framework of the European HySafe Network of Excellence (NoE), the 'Integration...
article 2011
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Fan, J.T. (author), Weerheijm, J. (author), Sluys, L.J. (author)
The dynamic mechanical behaviour of a soft polymer material (Clear Flex 75) was studied using a split Hopkinson pressure bar (SHPB) apparatus. Mechanical properties have been determined at moderate to high strain rates. Real time deformation and fracture were recorded using a high-speed camera. Fracture micrographs were examined to explore the...
article 2015
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li Piani, T. (author), Weerheijm, J. (author), Peroni, M. (author), Koene, L. (author), Krabbenborg, D. (author), Solomos, G. (author), Sluys, L.J. (author)
This paper presents the results of an experimental research aimed at assessing the material performance of adobe bricks in compression for a wide range of induced strain rates, from statics to high velocity impact. Adobe connotes a traditional masonry whose bricks are made of sundried soil mixtures possibly reinforced with natural fibres and...
article 2020
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Pereira, L.F. (author), Weerheijm, J. (author), Sluys, L.J. (author)
Although many aspects of the fracturing process of concrete are now well understood and successfully simulated with various models, it is still very difficult to properly simulate the different failure mechanisms observed in a concrete structure induced by ballistic impact. In this paper, an enhanced version of the effective-rate-dependent...
article 2018
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Brix, K.A. (author), Brody, D.L. (author), Grimes, J.B. (author), Yitzhak, A. (author), Agoston, D. (author), Aldag, M. (author), Armstrong, R. (author), Arun, P. (author), Audette, M. (author), Babcock, D. (author), Balaban, C. (author), Banton, R. (author), Bellgowan, P. (author), Borkholder, D. (author), Broglio, S. (author), Brokaw, E. (author), Cantu, R. (author), Carr, W. (author), Chapman, S. (author), Cmarik, J. (author), Colder, B. (author), Colombe, J. (author), Cook, D. (author), Cozzarelli, T. (author), Da Silva, U.O. (author), Daphalapurkar, N. (author), Dardzinski, B. (author), DeGraba, T. (author), DeMar, J. (author), DeWitt, D. (author), Dickstein, D. (author), Duckworth, J. (author), Elder, G. (author), Fazel-Rezai, R. (author), Fine, M. (author), Fiskum, G. (author), Fournier, A. (author), Ganpule, S. (author), Gill, J. (author), Glenn, J.F. (author), Greene, C. (author), Greig, N. (author), Haering, C. (author), Harrington, J. (author), Hein, A. (author), Helmick, K. (author), Hicks, R. (author), Hinds, S. (author), Hoffman, S. (author), Horkayne-Szakaly, I. (author), Iacono, D. (author), Ishii, E. (author), Jones, R.V. (author), Karami, G. (author), Krawczyk, D. (author), Labutta, R. (author), Latta, R. (author), Lattimore, T. (author), Leggieri, M. (author), Leonessa, F. (author), Lin, A. (author), Ling, G. (author), Long, M. (author), Lu, K.P. (author), Panker, S.M. (author), McCabe, J. (author), Merkle, A. (author), Montenigro, P. (author), Mueller, G.P. (author), Ng, L. (author), Nigam, S. (author), O'Donnell, J. (author), Okonkwo, D. (author), Pauli, I. (author), Perl, D. (author), Peskind, E. (author), Pfister, B. (author), Philippens, M. (author), Piehler, T. (author), Proctor, J. (author), Przekwas, A. (author), Qashu, F. (author), Raskind, M. (author), Razumovsky, A. (author), Reifman, J. (author), Reyes, P. (author), Rigby, P. (author), Risling, M. (author), Robinson, M. (author), Rooks, T. (author), Rosen, C. (author), Rosseau, G. (author), Sammons-Jackson, W. (author), Santago, A. (author), Shoge, R. (author), Sours, C. (author), Stone, J. (author), Templin, M. (author), Tepe, V. (author), Thielen, P. (author), Thomas, M. (author), Timmes, T. (author), Tortella, F. (author), Tucker, L. (author), Tweedie, D. (author), Hamm, D.V. (author), Christie Vu, B. (author), Wang, Y. (author), West, T. (author), Wilde, E. (author), Willis, A. (author), Wu, J. (author), Zai, L. (author), Zander, N. (author), Zheng, J. (author), Ziejewski, M. (author)
The potential relationship between chronic traumatic encephalopathy (CTE) and head injuries such as blast-related traumatic brain injury (TBI) is an important area of study, particularly for military and contact sports populations, yet little is known about this relationship. To address this topic, the Department of Defense (DoD) Blast Injury...
article 2017
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Phoenix, S.L. (author), Heisserer, U. (author), van der Werff, H. (author), van der Jagt-Deutekom, M.J. (author)
Yarn shooting experiments were conducted to determine the ballistically-relevant, Young’s modulus and tensile strength of ultra-high molecular weight polyethylene (UHMWPE) fiber. Target specimens were Dyneema® SK76 yarns (1760 dtex), twisted to 40 turns/m, and initially tensioned to stresses ranging from 29 to 2200 MPa. Yarns were impacted,...
article 2017
document
Pereira, L.F. (author), Weerheijm, J. (author), Sluys, L.J. (author)
The development of realistic numerical tools to efficiently model the response of concrete structures subjected to close-in detonations and high velocity impact has been one of the major quests in defense research. Under these loading conditions, quasi-brittle materials undergo a multitude of failure (damage) mechanisms. Dynamic tensile failure ...
article 2016
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Agar-Ozbek, A.S. (author), Weerheijm, J. (author), Schlangen, E. (author), van Breugel, K. (author)
Porous concrete incorporates a high percentage of meso-size air voids that makes its mechanical characteristics remarkably different from normal concrete. A research project was undertaken to design a special type of porous concrete, that fractures into small fragments when exposed to impact loading while having sufficient static strength, to be...
article 2013
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Al-Khoury, R. (author), Weerheijm, J. (author), Dingerdis, K. (author), Sluys, L.J. (author)
This paper presents a time integration scheme capable of simulating blast loading of relatively high frequency on porous media, using coarse meshes. The scheme is based on the partition of unity finite element method. The discontinuity is imposed on the velocity field, while the displacement field is kept continuous. The velocity discontinuity...
article 2011
document
Fan, J.T. (author), Weerheijm, J. (author), Sluys, L.J. (author)
The dynamic tensile mechanical response of a soft polymer material (Clear Flex 75) is investigated using a split Hopkinson tension bar (SHTB). Stress-strain relations are derived to reveal the mechanical properties at moderate and high strain rates. These relations appear to be rate dependent. Under static loading, the polymer exhibits an...
article 2015
document
van der Voort, M.M. (author), Weerheijm, J. (author)
The handling of explosives and ammunition introduces a safety risk for personnel and third parties. Accidents related to storage, transport and transshipment may result in severe injury and material damage. Dispersion of structural debris is one of the main hazards resulting from detonations inside structures. Reliable prediction models for...
article 2013
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Hegeman, J.B.J. (author), Luzginova, N.V. (author), Jong, M. (author), Groeneveld, H.D. (author), Borsboom, A. (author), Stuivinga, M.E.C. (author), van der Laan, J.G. (author)
The mechanical properties of two explosively formed saddle shaped 60 mm thick plates of 316L(N)-IG steel with and without an electron beam weld have been investigated. Two different conditions have been characterized: (1) Reference condition and (2) ITER relevant condition. The reference material exhibits consistent results for both plates,...
article 2011
document
Fan, J.T. (author), Weerheijm, J. (author), Sluys, L.J. (author)
The glass interface effect on dynamic tensile response of a soft polyurethane elastomeric polymer material has been investigated by subjecting a glass-polymer system of this polymer material matrix embedded a single 3 mm-diameter glass particle to impact loading in a split Hopkinson tension bar (SHTB) setup. The characteristics of the dynamic...
article 2015
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Pintar, F.A. (author), Philippens, M.M.G.M. (author), Zhang, J. (author), Yoganandan, N. (author)
The objective of the study was to obtain helmet-to-head contact forces from experiments, use a human head finite element model to determine regional responses, and compare outputs to skull fracture and brain injury thresholds. Tests were conducted using two types of helmets (A and B) fitted to a head-form. Seven load cells were used on the head...
article 2013
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Mediavilla Varas, J. (author), Philippens, M.M.G.M. (author), Meijer, S.R. (author), van den Berg, A.C. (author), Sibma, P.C. (author), van Bree, J.L.M.J. (author), de Vries, D.V.W.M. (author)
Shock tube experiments and simulations are conducted with a spherical gelatin filled skull- brain surrogate, in order to study the mechanisms leading to blast induced mild traumatic brain injury. A shock tube including sensor system is optimized to simulate realistic impro-vised explosive device blast profiles obtained from full scale field...
article 2011
document
Fan, J.T. (author), Weerheijm, J. (author), Sluys, L.J. (author)
A glass-polymer system of a polyurethane elastomeric matrix with a single 3 mm-diameter glass particle was investigated using a split Hopkinson pressure bar (SHPB) setup for revealing the dynamic compressive mechanical response. This study produced the characteristics of the dynamic stress-strain relation and the relations for the rate...
article 2016
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Larcher, M. (author), Arrigoni, M. (author), Bedon, C. (author), van Doormaal, J.C.A.M. (author), Haberacker, C. (author), Hüsken, G. (author), Millon, O. (author), Saarenheimo, A. (author), Solomos, G. (author), Thamie, L. (author), Valsamos, G. (author), Williams, A. (author), Stolz, A. (author)
The determination of the blast protection level of laminated glass windows and facades is of crucial importance, and it is normally done by using experimental investigations. In recent years numerical methods have become much more powerful also with respect to this kind of application. This paper attempts to give a first idea of a possible...
article 2016
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Fan, J.T. (author), Weerheijm, J. (author), Sluys, L.J. (author)
Multiple-particles-polymer systems of a polyurethane elastomeric matrix embedding 25wt.% and 50wt.% 0.5 mm-diameter PMMA particles were investigated using a split Hopkinson pressure bar (SHPB) setup for revealing the dynamic compressive mechanical response. Taking the 25wt.%-particles-polymer system as a reference case, the characteristics of...
article 2016
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