Auteur Franz-Josef Ulm
Documents disponibles écrits par cet auteur (10)
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Pivonka, Peter, Auteur ; Roman Lackner, Auteur ; Mang, Herbert A. ; Franz-Josef Ulm, Éditeur scientifique |This paper presents the application of three-dimensional (3D)-constitutive models for concrete formulated in the framework of plasticity theory to structural analyses of anchor devices. For this purpose, two commonly employed concrete material m[...]
Article : texte imprimé
Leung, Christopher K. Y., Auteur ; Klenke, Marcus, Auteur ; Tung, W. K. ; Luk, Herman C. Y. ; Franz-Josef Ulm, Éditeur scientifique |For concrete beams and slabs, the bonding of fiber reinforced plastic (FRP) plates to the bottom surface is an effective and efficient technique for flexural strengthening. Failure of strengthened members often occurs due to stress concentration[...]
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Stolarski, Adam, Auteur ; Franz-Josef Ulm, Éditeur scientifique |An integral dynamic strength criterion for concrete is proposed, which accounts for the short duration stress history in the range idealized as elastic. The concept of critical value of generalized stress impulse, proposed by Campbell for steel,[...]
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Christian Hellmich, Auteur ; Franz-Josef Ulm, Auteur |Understanding of ultrasonic wave propagationin bones is essential for further development of related techniques in clinical practice. As any other saturated porous medium, bone is characterized by different forms of longitudinal wave propagation[...]
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Eamon, Christopher D., Auteur ; Franz-Josef Ulm, Éditeur scientifique ; O'Daniel, James L. ; Baylot, James T., Auteur |Concrete masonry unit walls subjected to blast pressure were analyzed with the finite element method, with the goal of developing a computationally efficient and accurate model. Wall behavior can be grouped into three modes of failure, which cor[...]
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Van Zijl, Gideon P. A., Auteur ; Franz-Josef Ulm, Éditeur scientifique |In-plane shear and compression are important modes in masonry walls, both in load bearing structures and in framed structures. By these mechanical actions shear forces caused by wind and earthquakes are resisted. Upon shear-slipping along bed jo[...]
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Christian Hellmich, Auteur ; Dana Celundova, Auteur ; Franz-Josef Ulm, Auteur |We here extend the theory of microporomechanics by Dormieux et al. to multiple pore spaces. As an application, we reveal, on the basis of a recently validated multiscale elastic model for bone tissues by Fritsch and Hellmich, the effects of mult[...]
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Matthieu Vandamme, Auteur ; Franz-Josef Ulm, Auteur ; Philip Fonollosa, Auteur |Herein, we present a comprehensive nanoindentation investigation of cement pastes prepared at substoichiometric water-to-cement (w/c) mass ratios between 0.15 and 0.4 with and without heat treatment. Based on a statistical indentation technique,[...]
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Da Silva, Ana Rita, Auteur ; Franz-Josef Ulm, Éditeur scientifique ; François Hild ; Billardon, René ; Proença, Sergio P. B., Auteur |The ultimate strength of structures made of brittle materials.such as microconcrete.strongly depends on microstructural defects, the structure size, and the loading pattern. Probabilistic approaches allow one to take account of such dependencies[...]
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Gelli, M. S., Auteur ; Royer-Carfagni, G. F., Auteur ; Franz-Josef Ulm, Éditeur scientifique |We propose a procedure to obtain a consistent, mesh-objective, continuous model starting from chains composed of discrete springs exhibiting strain softening. Observing the size-dependent response of tensile chains and the corresponding scaling [...]
