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Magnetic field distribution detecting and computing methods for experimental mechanics

Kaleta J., Wiewiórski P.

Engineering Transactions

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2010

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Vol. 58, iss. 3/4

97-118

EN

This paper presents the design and measuring potential of the latest generation of the magnetic scanner called Magscanner-Maglab System (MMS) which enables a fast acquisition of 3D signals from magnetic sensors and their visualization as digitalized magnetic images for a variety of flat and cylindrical objects. MMS can be used as entirely autonomous or combined (through common control) with a typical material testing machine for static load and fatigue tests. The system can be used to investigate magnetomechanical phenomena and identify their models in experimental mechanics, as well as detect and locate strain fields, areas of plastic deformations and cracks in industrial processes. It has been used recently to measure the magnetic field around objects subjected to technological processing in order to check their quality.

2

Holistic approach to diagnostics of engineering materials

Kasperkiewicz J., Alterman D.

Computer Assisted Mechanics and Engineering Sciences

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2007

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Vol. 14, No. 2

197-207

EN

A concept is presented of a system for automatic processing of the civil engineering data. It may concern designing, optimisation or diagnostics of constructional materials. The main point of interest was concrete and various concrete like composite materials. The applied methods are a combination of various soft computing techniques, like artificial neural networks, machine learning and certain techniques originating in statistics. The system is aimed at taking advantage of varied information available in publications, reports, monographs and direct experimental results, perhaps including even the grey information resources. After preparation of a database collected from laboratory or in-situ observations concerning the behaviour of various concrete materials, and gathered during the two last decades, a number of experiments were performed on the system dedicated mainly to prediction of compressive strength and frost resistance of concrete. The proposed approach allows more efficient control of information in problems of concrete technology.

3

Perspektywy wykorzystania technik obliczeń równoległych w inżynierii procesowej na przykładzie metody dynamiki molekularnej

Podgórski A., Moskal A., Gradoń L., Przekop R.

Inżynieria Chemiczna i Procesowa

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2001

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T. 22, z. 3D

1145--1150

PL

W niniejszej pracy przedstawiono ilustrację zastosowania metody obliczeń równoległych na prostym przykładzie wyznaczania izotermicznego współczynnika ściśliwości gazu metodą dynamiki molekularnej przez całkowanie równań ruchu Newtona dla molekuł w polu sił Lenarda-Jonesa, wykorzystując twierdzenie o fluktuacjach wielkości termodynamicznych. Dokonano porównania czasu obliczeń w zależności od liczby używanych przez aplikację komputerową procesorów. Zwrócono uwagę na wzrost efektywności obliczeń równoległych ze wzrostem złożoności zadania (ilości rozpatrywanych molekuł).

EN

This work presents implementation of the parallel computing technique for a simple example of determination of the gas isothermal compressibility coefficient. It was done using the molecular dynamics method, which is based on the integration of the Newton’s equations of motion for molecules in the Lennard-Jones force field, and applying the thermodynamic fluctuations theorem. Computing time for various processor numbers used by the application was compared. An increasing efficiency of the parallel computing with the increase of the problem complexity (number of considered particles) was emphasised.