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Recent Submissions
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Stabilization of the ammonia in SNCR fly ash - the influence of tannins presence on the preparation of an autoclaved aerated concrete
(IOP Publishing, 2019-08-14)Thanks to the legislative regulations on NOx emissions, a selective non-catalytic reduction (SNCR) technology had been introduced to a coal combustion process in power plants. The valuable by-product, fly ash, contains ... -
Components of the Fracture Response of Alkali-Activated Slag Composites with Steel Microfibers
(MDPI, 2019-05-16)Knowledge of the mechanical and primarily fracture parameters of composites with a brittle matrix is essential for the quantification of their resistance to crack initiation and growth, and also for the specification of ... -
Analysis of accuracy of Williams series approximation of stress field in cracked body – influence of area of interest around crack-tip on multi-parameter regression performance
(Gruppo Italiano Frattura, 2017-01-01)A study on the accuracy of an approximation of the stress field in a cracked body is presented. Crack-tip stress tensor is expressed using the linear elastic fracture mechanics (LEFM) theory in this work, more precisely ... -
Modelling of size and shape of damage zone in quasi-brittle notched specimens – analytical approach based on fracture-mechanical evaluation of loading curves
(Gruppo Italiano Frattura, 2017-01-01)An analysis focused on capturing the phenomenon of quasibrittle fracture is presented. Selected parameters relevant for quasi-brittle fracture are evaluated and an assessment of their dependence on the size and shape of ... -
Numerical simulations of tests masonry walls from ceramic block using a detailed finite element model
(Gruppo Italiano Frattura, 2017-01-01)This article deals with an analysis of the behaviour of brick ceramic walls. The behaviour of the walls was analysed experimentally in order to obtain their bearing capacity under static loading and their seismic resistance. ... -
Inverse Identification of the Material Parameters of a Nonlinear Concrete Constitutive Model Based on the Triaxial Compression Strength Testing
(Gruppo Italiano Frattura, 2017-01-01)The aim of this paper is to perform the inverse identification of the material parameters of a nonlinear constitutive model intended for the modeling of concrete which is known as the Karagozian & Case Concrete model. At ... -
On adaptive refinements in discrete probabilistic fracture models
(Gruppo Italiano Frattura, 2017-01-01)The possibility to adaptively change discretization density is a well acknowledged and used feature of many continuum models. It is employed to save computational time and increase solution accuracy. Recently, adaptivity ... -
Crack propagation in a brittle DCB specimen assessed by means of the Williams’ power expansion
(Gruppo Italiano Frattura, 2018-09-19)A double cantilever beam geometry has been chosen in order to investigate the importance of the higher-order terms of the Williams' power expansion for the crack path estimation. The crack propagation has been tested ... -
Determining fracture energy parameters of concrete from the modified compact tension test
(Gruppo Italiano Frattura, 2014-09-01)The modified compact tension (MCT) test, though not yet recognized as a valid test for determining fracture energy of concrete, is believed to represent a plausible and suitable alternative versus other well established ... -
Williams expansion-based approximation of the stress field in an Al 2024 body with a crack from optical measurements
(Gruppo Italiano Frattura, 2017-07-01)A study on the approximation of the stress field in the vicinity of crack tip in a compact tension specimen made from Al 2024-T351 is presented. Crack tip stress tensor components are expressed using the linear elastic ... -
Modified compact tension specimen for experiments on cement based materials: comparison of calibration curves from 2D and 3D numerical solutions
(Gruppo Italiano Frattura, 2017-01-01)The evaluation of fracture mechanics parameters of materials has become very important part of considering the condition of older constructions as well as properties of newly developed materials. This contribution focuses ... -
Impact of specific fracture energy investigated in front of the crack tip of three-point bending specimen
(Gruppo Italiano Frattura, 2017-07-01)Presented study is focused on the analysis of the dependence of the specific fracture energy value on the assumed work of fracture in three-point bending tests. Specimens of different sizes and relative notch lengths are ... -
Multi-parameter fracture mechanics: crack path in a mixed-mode specimen
(Gruppo Italiano Frattura, 2019-07-02)A mixed-mode geometry has been chosen to investigate a crack propagation using the multi-parameter fracture mechanics concept. The socalled Williams’ series expansion is used for the crack-tip stress field approximation. ... -
Estimation of the crack propagation direction in a mixed-mode geometry via multi-parameter fracture criteria
(Gruppo Italiano Frattura, 2015-08-15)The presented work introduces a numerical parametric study on the crack propagation direction under mixed-mode conditions (mode I + II). It is conducted for the geometry of an eccentric asymmetric four-point bending of a ... -
Cost-Effective High-Performance Concrete: Experimental Analysis on Shrinkage
(MDPI, 2019-08-26)This paper focuses on the experimental determination of the shrinkage process in Self-Compacting High-Performance Concrete (SCC HPC) exposed to dry air and autogenous conditions. Special molds with dimensions of 100 mm × ... -
Effect of curing environment on length changes of alkali-activated slag/cement kiln by-pass dust mixtures
(IOP Publishing, 2019-08-14)This paper investigates the combination of commonly used blast furnace slag (BFS) and quite non-traditional cement kiln by-pass dust (BD) for the preparation of alkali-activated binder. More specifically, the possibilities ... -
The possibilities of application of radiant wall cooling in existing buildings as a part of their retrofit
(EDP Sciences, 2019-08-13)In the following years and decades the increase in cooling capacity will put tremendous pressure on the energy infrastructure and severely increase the environmental impacts. In a moderate climate and well thermally insulated ... -
Radiant wall cooling with pipes arranged in insulation panels attached to facades of existing buildings
(EDP Sciences, 2019-08-13)Radiant systems are being increasingly used for space heating and cooling of buildings. The contemporary research of radiant systems addresses mainly floor and ceiling structures. Research regarding the possibilities of ... -
Multi-parameter approximation of stress field in a cracked specimen using purpose-built Java applications
(Gruppo Italiano Frattura, 2015-05-15)A quality of multi-parameter approximation of the stress and displacement fields around a crack tip in a non-brittle material test specimen is studied in the paper. The stress field approximation using Williams power series ... -
Over-deterministic method: The influence of rounding numbers on the accuracy of the values of Williams' expansion terms
(Gruppo Italiano Frattura, 2017-11-01)A study on the accuracy of the values of Williams’ expansion terms influenced by rounding numbers is presented. The results are presented taking into account a three-point bend single edge notched beam. Crack tip stress ...
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