Searched for: author%3A%22Weerheijm%2C+J.%22
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Gartner, T. (author), van den Boom, S.J. (author), Weerheijm, J. (author), Sluijs, L.J. (author)
conference paper 2022
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van den Boom, S.J. (author), van Veen, D. (author), Diederen, A. (author), Gartner, T. (author), Weerheijm, J. (author)
conference paper 2022
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li Piani, T. (author), Weerheijm, J. (author), Sluys, L.J. (author)
Adobe is a traditional masonry made of sundried earthen bricks and mud mortar. Despite a millennial history of buildings of architectural value, adobe still connotes a so called ‘not engineered’ construction type. Namely, the material and structural properties of adobe are still not entirely addressed, resulting in an equally uncertain normative...
article 2022
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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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Simons, E.C. (author), Weerheijm, J. (author), Toussaint, G. (author), Sluys, L.J. (author)
In this study, the impact of a steel spherical projectile on an alumina ceramic is considered. New experimental and numerical results are presented and analysed. Numerical results are obtained using the Finite Element Method and the upgraded viscosity regularized Johnson-Holmquist-2 constitutive model to describe the ceramic material behaviour....
article 2020
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Lubbers, L.A. (author), Philippens, M.M.G.M. (author), Weerheijm, J. (author)
Mechanical metamaterials – man-made materials which derive their unusual properties from their structure rather than their composition (Bertoldi, 2017) – are able to prohibit the propagation of mechanical waves in a pre-defined frequency band, the so-called band gap (Hussein, 2014, Krushynska, 2017). Here we show how metamaterials that exhibit a...
conference paper 2020
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Li Piani, T. (author), Weerheijm, J. (author), Moriniere, G. (author), Hoogland, J. (author), Schipperen, J.H.A. (author), Roebroeks, G.H.J.J. (author), Alderliesten, R. (author)
Landmines are used in battle fields to damage military vehicles. Current vehicle applications in Out of area operations (OoA) are mainly based on steel and aluminum. These offer protection at the expenses of high weight, mobility limitations and design restrictions. A prototype of composite panel which outperforms the blast response of...
article 2020
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Ozbek, A.S. (author), Pedersen, R.R. (author), Weerheijm, J. (author), van Breugel, K. (author)
This study presents the numerical analyses conducted to investigate the impact behavior of different porous concretes, which have also been cast and tested experimentally. For a realistic representation of the real porous concretes containing arbitrary shaped air pores, a mesh generation code was developed in which the aggregates in the mixtures...
article 2019
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Simons, E.C. (author), Weerheijm, J. (author), Sluys, L.J. (author)
Alumina ceramic is often used in armour systems. This material is known to have a brittle response under tensile loading, while a ductile response is found when sufficiently high pressures are reached. During projectile impact a ceramic material experiences both tensile loading and high pressures, hence fails in both a brittle and ductile way....
article 2019
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Li Piani, T. (author), Weerheijm, J. (author), Koene, L. (author), Sluys, L.J. (author)
A local damage model is proposed for the numerical assessment of the static performance of Adobe masonry components. The model was applied to simulate the experimental behaviour of sundried soil bricks and mud mortar tested in uniaxial compression and bending. Numerical simulations of the model are made mesh objective by means of a rate...
article 2019
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li Piani, T. (author), Weerheijm, J. (author), Sluys, L.J. (author)
article 2019
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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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Roebroeks, G.H.J.J. (author), Hoogland, J. (author), Weerheijm, J. (author), van Daelen, E.C.M. (author), van de Kasteele, R.M. (author), Ierschot, P.G.A. (author)
Over the last three years TNO has explored the possibilities of fiber-reinforced composites to provide vehicle underbelly protection against blast loading. This work consists of three parts: • Numerical analysis of full-scale blast loading conditions in comparison to scaled blast loading conditions. • The development of a test method suitable to...
conference paper 2018
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Roebroeks, G.H.J.J. (author), Hoogland, J. (author), Weerheijm, J. (author), van Daelen, E.C.M. (author), van de Kasteele, R.M. (author), Ierschot, P.G.A. (author)
This paper shows how standard fiber-reinforced composite materials have limited resistance against blast loading. Their relatively high brittleness in comparison to metals causes them to fail early under out-of-plane blast loading. Their failure appears to be mainly caused by exceedance of strain to failure by local bending, fully absorbing the...
conference paper 2018
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Carton, E.P. (author), Roebroeks, G.H.J.J. (author), Weerheijm, J. (author), Diederen, A.M. (author)
Research on armor ceramics created only limited success in its search for relations between mechanical properties and the ballistic efficiency of this class of materials. Also TNO performed research on this subject using a range of experimental test set-ups (mainly using small and mid-caliber rounds) and diagnostic tools on a range of ceramic...
conference paper 2018
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Li Piani, T. (author), Krabbenborg, D. (author), Weerheijm, J. (author), Koene, L. (author), Sluijs, L.J. (author)
Adobe is an ancient building technology made of sun dried bricks joined together by mud mortar. This paper deals with the physical and mechanical characterization of three different typologies of adobe bricks and one typology of mud mortar produced in Europe. They differed in terms of internal soil element proportions and amount of organic...
article 2018
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Verolme, E.K. (author), van der Voort, M.M. (author), Smits, R. (author), Weerheijm, J. (author), Koh, Y.H. (author), Kang, K.W. (author)
There is limited knowledge on deriving the strength of an explosion based on the observed explosion effects. Existing methods are based primarily on the effects of blast overpressure on surrounding structures. Window breakage and structural damage are well studied and are widely used to derive most probable explosion strengths. Other explosive...
article 2018
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li Piani, T. (author), Weerheijm, J. (author), Koene, L. (author), Sluys, L.J. (author)
conference paper 2018
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Agar Ozbek, A.S. (author), Weerheijm, J. (author), van Breugel, K. (author)
In this study, an impact strength measurement method based on high speed photography, that has been developed for testing porous concrete, was introduced. In the experiments, a drop weight impact test set-up instrumented with a high speed camera was used. The impact strength analyses were conducted using impedance mismatch method, where the wave...
article 2018
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Fan, J.T. (author), Weerheijm, J. (author), Sluys, L.J. (author)
The deformation-to-fracture evolution of aflexible polymer material under high-strain-rate compressive loadingconducted by a split Hopkinson pressure bar (SHPB) setup was investigated. Representative tests were carriedout at different strain rate levels, followed by the characterization of dynamic damage after each test. Craze andcrack patterns...
article 2018
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