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2 Kaczmarski A.

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The modelling of accumulation and dissipation of energy in mechanical drive system

Kaczmarski A.

Journal of Polish CIMAC

2013

Vol. 8, no 1

49--58

This paper presents a modelling of accumulation and dissipation energy in simple drive system. The simple drive system is presented by laboratory stand designed for calculate fatigue life of material for bending and rotation tests pieces. The laboratory stand was prepared to diagnosis of fatigue life of material by use energetic methods. This idea was submitted as utility model to Polish Patent Office. This laboratory stand gives ability to research a influence of change of fatigue life for energetic symptoms (like: temperature of material, vibration, Acoustic Emission, rotary speed, electrical energy). This paper presents influence of change of fatigue life for rotary speed. The rotary speed is value describing effect of accumulation and dissipation energy in drive system (in material). A difference between energy taken from power supply and consumed for giving rotary speed is used for fatigue of material. This simple theory is presented and modelling in this paper. The next paper (in this book) describes results of research that could verify this theory.

Application laboratory stand for multi-symptoms tests for high cyclic fatigue of constructional material

Kaczmarski A.

Journal of Polish CIMAC

2012

Vol. 7, no 3

75-84

This paper describes a need of diagnostics present ship plants according to current technical state. In order to reach competent physical quantity describing fatigue of materials by congregated energy. This paper describes using some diagnostics methods (acoustic emission AE, vibration, thermovision, deformation) in order to definition fatigue state of construction material. The author tries to find correlation between measured quantities which describe continuous process of fatigue wear. Innovation of this research allows use a new, little-know and little-recognized acoustic emission method by energetic fatigue research. Besides the results of AE will verified by use well-knowing and described research methods that are using to appreciate fatigue materials (vibration, thermovision, deformation). Used diagnostic methods were verified with photos of cracked scrap. The conclusion describes suggestion of research results. They will be needed to classification of fatigue symptoms that are measured by the above methods and are giving competent diagnostic dependence. This paper deals the results of elementary research on laboratory stand. They will be used to diagnostic of ship plants and their driving elements (shafts, cams, valves).