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Compressive strength of concrete cubes containing rice husk ash (RHA) at low specific surface pre-soaked with equal weight of water, at free water/cement (w/c) ratio of 0 [...]
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The structural analysis in earthquake engineering is a complex task because the problem is dynamic and usually non-linear, the structural system is usually complex, and i [...]
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Fatigue is a process of permanent progressive changes in the structure of a material exposed to cyclic loading. This paper describes the strain development in concrete st [...]
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The tilting pad bearings are very often applied in high speed rotating machines. The exact solution of bearing characteristics, including the motion of tilting pads, is v [...]
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The masonry constructions are widely used for a long time. Nowadays, new masonry structures are on demand owing to its variety and appealing mechanical properties. Both b [...]
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This paper is focused on fracture energy which belongs to the basic fracture-mechanical characteristics of quasi-brittle materials. This parameter is explored here from t [...]
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The paper describes the influence of water/gypsum ratio to the dynamic modulus of elasticity of dental gypsum. Commercially available dental gypsum Interdent® (with comp [...]
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8.
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Čulík, Jan
Abstrakt: The topic of this paper is a computer simulation of treatment of children spine deformities with braces (orthosis). Orthopaedists in the Czech Republic use corr [...]
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Říman, Pavel
Abstrakt: The primary mechanism for traffic noise reduction in existing highways is trough the use of noise barriers. The most of present used methods calculating noise b [...]
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Fuxa, J.
Fracture strain diagram. Strength criterion as a contribution of physics and mechanics. Review. Definition of the "reference normal" and "reference shear" str [...]
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Presented paper deals with fracture behaviour of carbon fibre reinforced composites on the basis of Portland (PC) and alumina (HC) cement. Carbon fibres can be used for [...]
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The paper presents the results of the computational modelling of the stress states in the ceramic head of the hip joint endoprosthesis. The analysed system is loaded acco [...]
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This paper presents the consideration on the change judgement of J integral and Q parameter as the base parameters of two-parameter elastic-plastic fracture mechanics. An [...]
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Currently, the precast industry represents 20% of concrete production around the world and the use of steam curing to accelerate hydration has been adopted as one of the [...]
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The aim of the study was to present influence of the three-dimensional spacing of the bone implants to the stability of bone fracture fixing in biplane external stabilize [...]
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The contribution deals with the 3D analysis of the chevron notched three point bending specimen which is used to determine the fracture toughness of brittle matrix compos [...]
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The crack growth prediction techniques in the critical area of the small transport aircraft undercarriage bracket has been describe in this paper. Stress-state was determ [...]
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18.
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Properties of a molten slag and concrete containing the molten slag as a fine aggregate were investigated, which was emitted in Kure City in Hiroshima Prefecture. Water t [...]
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Brož, P.
Stochastic theory for fracture of concrete materials is applied. The fracture process can be described not only under monotonically increasing load but also under time-de [...]
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The paper is focused on definition and application of the simple bending fracture model suitable for precision approximation of measured load–deflection diagrams from [...]
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This paper deals with numerical simulation of the fracture process in cementitious composite specimens. A technique based on physical discretization of continuum is emplo [...]
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Seven ductile fracture criteria are applied to simulation of cold forward extrusion and their performance in prediction of chevron cracks is presented. The criteria are i [...]
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An experimental investigation was conducted to study both the mechanical and durability performance of various specimens constructed with both high-volume fly ash concret [...]
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This article is focused on the computational solution of the material tests and their evaluations. Problem deals with torsion low-cycle fatigue tests of steel specimens. [...]
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A two-parameter fracture mechanics method is applied to small cracks near a stress concentrator. The small crack in the present contribution is considered as crack influe [...]
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Cyclic tests with the maximum force in a cycle Fmax = 5,5 kN and the cycle asymmetry ratio R = F min / F max = 0, 1 were carried out on fiat specimens of 5mm in thickness [...]
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The results of fracture experiments and numerical model with sandstone specimens are presented in this paper. The aim is the comparison of selected mechanical/fracture pa [...]
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The fatigue crack growth rate in the Eurofer 97 steel was measured by two different methodologies. Small crack growth data were obtained using cylindrical specimens with [...]
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For high fluidity concrete beams with medium-quality recycled coarse aggregate and melt-solidified slag aggregate, we investigated the fresh concrete properties and the b [...]
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The paper deals with a static and fatigue strength criterion based on the theory of the reference normal and shear stresses – see Fuxa, J. (2003) and Fuxa, J. (2004). T [...]
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This article shows: 1. Some studies of a low-cycle material fatigue caused by cyclical contact between two spheres with the same diameters. The spheres are made up from m [...]
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In restoration or repair of old buildings the correct estimation of the stress-strain-relationship of the existing structure is an important task. Masonry stiffness is cr [...]
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The article is a contribution to numerical simulations of pitting arise phenomena on the gear teeth. The basic assumption of the presented simulations was that pitting (p [...]
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36.
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Bayer, Z.
A set of approximations for the specific volume of saturated liquid and saturated vapor, saturation pressure and for the isothermal derivatives (∂π/∂ϕ´)τ , (∂π [...]
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The basic fracture properties of cement-based composite are ascertained on the basis of test evaluations of the specimens in suitable test configurations. Three-point ben [...]
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This contribution presents a simple numerical model for crack growth under mode-I compressive fatigue loading. Residual tensile stress at the crack tip, which is responsi [...]
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A 3D elastic-plastic FEM model with small strains was used for simulation of the deformation mechanics at the curved front of the planar fatigue crack growing in the thic [...]
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40.
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Three point bending test of central notched specimen is used for determination of fracture properties of concrete, mortar and hardened cement paste. The properties – e. [...]
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41.
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Selected approximation curves of mechanical-fracture parameter values − modulus of elasticity, effective fracture toughness, specific fracture energy, compressive cube [...]
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