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The paper deals with the fracture problematics which is solved by CAE systems. Main goal of the numerical simulation is to investigate the stress state near the crack tip through determination of stress intensity factors. The investigated component is thick plate with symmetric central crack. Through determination of stress intensity factor for all three fracture modes of cracks can be told whether the crack will be grown by comparison of their values with critical value of the stress intensity factor for used material called as the plane strain fracture toughnessKIC. Numerical simulations were realized by the worldwide used code ANSYS. Through numerical simulation can be solved diverse fracture problems with various shapes of cracks and subsequently we can produce safer and more reliable products. [ABSTRACT FROM AUTHOR]

The quality of dried products mainly depends on temperature and moisture content changes during the drying process, as they govern the quality determining reactions taking place during the dehydration. For optimizing the quality of the drying process it is valuable to predict moisture content and temperature of the drying material during the drying process. Heat and mass transport in the material and on its surface can be described by partial differential equations. This paper describes a mathematical technique originally used in aerospace engineering which allows for solving the partial differential equations numerically. The lumped parameter model of the drying material enables to predict the influence of external process parameters on the drying characteristics of the product and its temperature. [ABSTRACT FROM AUTHOR]

The paper presents simulation of hot rolling process of profile I, to determine the state of tension in the rolling cylinders, using professional simulation software COSMOS / M 2.5. Initial data from the simulation program (the application of cooling water and rolled pieces temperatures) are data taken in Romanian industrial companies. The simulation is performed for two cases of rolling: the application of cooling water on two and four surfaces at a temperature of 800ΰC, 850ΰC respectively. Recorded values are presented for thermal stress in the two cases of simulation, thermal stress inducing the thermal fatigue (this influencing durability cylinders rolling operation). [ABSTRACT FROM AUTHOR]

This paper deals with the testing of prediction abilities of artificial neural networks. Special attention is paid to computational demands of various types of artificial neural networks and their applicability in model predictive control. in order to provide generally comparable results, the CATS benchmark (Competition on Artificial Time Series) was chosen as the testing method. [ABSTRACT FROM AUTHOR]

In the class of the investigation instruments offered by the numerical analysis, a particular role is performed by the interpolation methods. We can notice that most of the so-called classical analytic models can nowadays be used in computer based approaches as components of some more complex hybrid models. Interpolation, as a part of the numerical methods is used in all the sub-models of a complex model and the performance of the implementations have an important overall influence. The paper presents several ideas regarding the interpolation instruments employed in computer based models in engineering, weak point of some software applications which offer this kind of facilities and functionalities which should be implemented in the next generation software. [ABSTRACT FROM AUTHOR]