Searched for: author%3A%22Weerheijm%2C+J.%22
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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
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van Deursen, J. (author), Weerheijm, J. (author)
conference paper 2011
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van Doormaal, J.C.A.M. (author), Nöldgen, M. (author), van Deursen, J.R. (author), Weerheijm, J. (author)
Terrorist attacks by bombing (E) or Chemical, Biological or Radiological (CBR)-agents are threats with a low probability but with disastrous consequences. There is strong need to protect people, the societal community and critical infrastructures and utilities against being damaged, destroyed or disrupted by deliberate acts of terrorism....
conference paper 2011
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Suddle, S. (author), Weerheijm, J. (author), van den Berg, A.C. (author)
conference paper 2010
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Weerheijm, J. (author), Sluys, L.J. (author)
This paper presents a time integration scheme capable to simulate blast loading causing high frequency wave propagation in porous media using coarse meshes. The scheme is based on the partition of unity method. The discontinuity is imposed on the velocity field, while the displacement field is kept continuous. The developed time integration...
conference paper 2010
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van Doormaal, J.C.A.M. (author), van der Voort, M.M. (author), Weerheijm, J. (author), TNO Defensie en Veiligheid (author)
Risk analysis tools use probit functions to quantify the risk of lethality due to glass breakage. These probit functions are often based on data for an average sized or standard sized window. In reality however, there will be a range of window sizes and thicknesses. As a result, the current probits have the following shortcomings: - The...
conference paper 2010
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TNO Defensie en Veiligheid (author), Suddle, S.I. (author), Weerheijm, J. (author), van den Berg, A.C. (author)
The use of space is being intensified near and above transport routes of hazardous materials. In The Netherlands, some buildings are even realized above infrastructure with transport of hazardous materials like LPG. An accident with an LPG-tank may result in a BLEVE, causing injuries and large structural damage to the spanning building and the...
conference paper 2010
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Vegt, I. (author), Weerheijm, J. (author), van Breugel, K. (author), TNO Defensie en Veiligheid (author)
To predict the behaviour of concrete structures under impact and explosive loading numerical models are often used. The increase in tensile strength with increasing loading rates is already included in most dynamic concrete models. Often it is assumed that for the fracture energy and the characteristics of the fracture zone the same rate...
conference paper 2009
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Mediavilla Varas, J. (author), Weerheijm, J. (author), van Doormaal, J.C.A.M. (author), Rhijnsburger, M.P.M. (author), TNO Defensie en Veiligheid (author), DenV (author)
This paper deals with the effect of an internal explosion of cased ammunition in RC magazine structures. By means of a numerical approach, the main differences between the effect of a bare and cased charge are illustrated. A bottom-up strategy has been implemented which is based on modeling the single fragment impact, and enables to compute a...
conference paper 2009
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Mediavilla, J. (author), Weerheijm, J. (author), van Doormaal, J.C.A.M. (author), Rhijnsburger, R.M. (author), TNO Defensie en Veiligheid (author)
This paper deals with the effect of an internal explosion of cased ammunition on RC magazine structures. By means of a numerical approach, the main differences between the effect of a bare and cased charge are illustrated. A bottom-up strategy has been implemented which is based on modeling the single fragment impact, and enables to compute a...
conference paper 2009
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Weerheijm, J. (author), Rhijnsburger, M.P.M. (author), Vegt, I. (author), Tyler Street, M.D. (author), TNO Defensie en Veiligheid (author)
Passive protection systems for expeditionary forces camps are studied by TNO on behalf of the Netherland’s MODCorps of Engineers. This paper will first address the inventory of the internationally available knowledge on threat versus protection systems. Next the results of an exploratory experimental and numerical study regarding the...
conference paper 2009
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van der Meulen, O.R. (author), Mediavilla Varas, J. (author), Weerheijm, J. (author), Soetens, F. (author), TNO Defensie en Veiligheid (author)
Dynamic crack propagation of pressurized aluminum vessels has been studied. Rate insensitive cohesive zone models overpredict the rate of fracture. This was the motivation to implement a new Perzyna cohesive zone model and which is able to explain the low measured crack speeds.
conference paper 2009
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Weerheijm, J. (author), Vegt, I. (author), van Breugel, K. (author), TNO Defensie en Veiligheid (author)
conference paper 2009
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Weerheijm, J. (author), van der Horst, M.J. (author), van Doormaal, J.C.A.M. (author), van der Voort, M.M. (author), TNO Defensie en Veiligheid (author)
conference paper 2008
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van der Voort, M.M. (author), van Doormaal, J.C.A.M. (author), Verolme, E.K. (author), Weerheijm, J. (author), TNO Defensie en Veiligheid (author)
A deterministic model has been developed that describes the throw of debris or fragments from a source with an arbitrary geometry and for arbitrary initial conditions. The initial conditions are defined by the distributions of mass, launch velocity and launch direction. The item density in an exposed area, i.e. the number of impacting debris or...
article 2008
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TNO Defensie en Veiligheid (author), van der Voort, M.M. (author), Verolme, E.K. (author), Weerheijm, J. (author)
The throw of debris and fragments is often a dominant effect in explosion events. Models to quantify this effect are therefore of great importance for consequence analysis and risk assessment methodologies. Recently much effort has been expended to develop throw models related to detonations in reinforced concrete ammunition magazines (Klotz...
conference paper 2008
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Suddle, S.I. (author), Weerheijm, J. (author), van den Berg, A.C. (author), Vambersky, J.N.J.A. (author)
The use of space is being intensified near and above transport routes of hazardous materials. In The Netherlands, some buildings are even realized above infrastructure with transport of hazardous materials like LPG (Liquefied Petroleum Gas). An accident with an LPG-tank may result in a BLEVE (Boiling Liquid Expanding Vapour Explosion), causing...
conference paper 2008
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TNO Defensie en Veiligheid (author), Dörr, A. (author), van der Voort, M.M. (author), Kummer, P. (author), Pfanner, T. (author), Weerheijm, J. (author), van Amelsfort, R.J.M. (author)
The international group of experts on explosive safety ‘Klotz Group’ is developing an engineering tool (KG-ETool) for the prediction of debris throw from reinforced concrete structures after an accidental explosion. The tool is based on state-of-the-art knowledge, and available debris pick-up data from a number of trials. With the help of this...
conference paper 2008
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TNO Defensie en Veiligheid (author), van der Voort, M.M. (author), Verolme, E.K. (author), Sluys, W. (author), Jimenez Zambrano, R. (author), Weerheijm, J. (author), van der Horst, M.J. (author)
conference paper 2008
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van Doormaal, J.C.A.M. (author), Weerheijm, J. (author), Rhijnsburger, M.P.M. (author), TNO Defensie en Veiligheid (author)
conference paper 2007
Searched for: author%3A%22Weerheijm%2C+J.%22
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