Technical Transactions iss. 15. Mechanics iss. 5-M

Technical Transactions iss. 15. Mechanics iss. 5-M

Type: Collection of magazine numbers
Release date

Collection items (12)


Influence of a skin tissue anisotropy on mechanical hysteresis

Wiśniewska, Anna, Liber-Kneć, Aneta
Article
2016
The mechanical properties of a pig’s skin as a human skin substitute in the studies carried out in vitro are used in surgery and engineering design. The investigation included the uniaxial tensile test and cyclic loading-unloading tests of a swine skin. The values of dissipated energy and energy dissipation ratio for first, fifth and tenth hysteresis loop of every examined sample were obtained. In the investigation, the skin anisotropy was taken into consideration. The estimation of the influence of various levels of load on the values of the measured parameters was also made.

Infrared camera application in creation of the diagnostic method for deep vein thrombosis in the distal parts of the body

Ślusarczyk, Łukasz, Nowak, Agata
Article
2016
The main purpose of this paper is to show major increases in the temperatures of the lower extremity limb in comparison to the latter. During the course of the study, it was found that a significant difference in the temperatures arises between the healthy left limb (subject to the conducted tests) and the sick right (‘control’) one, before and after performing an attempt to cool down. The examination consisted of a series of credible medical measurements with the application of professional thermal imagining equipment. The abovementioned study acknowledged the potential of thermal imagining diagnostics in terms of assessing the state of health of the examined subject. In terms of thermal imagining methods usage, it is possible not only to locate the inflamed spots effectively, but also to monitor the course of the treatment of the inflammatory conditions.

Build Up Edge phenomenon and chip forms in Inconel 625 alloy longitudinal turning – case study

Słodki, Bogdan
Article
2016
The paper presents the wear process of a carbide insert in Inconel 625 longitudinal turning as well as examples of chip forms. Inconel 625 alloy belongs to the difficult-to-cut material group and causes many problems in machining operations in industry. A major one concerns chip forms produced in turning operations and quick wear of the cutting edge. The conveyed research also revealed the Build Up Edge (BUE) phenomenon, which took place in conveyed tests. A few examples have been presented and analyzed.

Durability of hydraulic clutches filled with electrorheological fluids

Olszak, Artur, Ziąbska, Elżbieta, Osowski, Karol, Kęsy, Andrzej, Kęsy, Zbigniew
Article
2016
The paper presents the results of experimental tests concerning the durability of two devices, using three different electrorheological fluids as working fluids. They were: a cylinder viscous brake and a dual clutch, consisting of a cylinder viscous clutch and a hydrokinetic clutch. The concept of the control of devices filled with electrorheological working fluids involves the impact of the electric field of variable intensity on the working fluid and thus causes changes of sheer stress in it. It also changes the transmitted torque. The studies show that the most important factors affecting the durability of a viscous brake and a dual clutch are: sealing of the workspace, including the electrorheological fluid, electrorheological fluid type, electrodes and electrical wire insulation, supplying high voltage from the power supply. Another essential factor is that the durability of the electrorheological fluid, defined by the rate of wear, is found within the ranges reported in the literature and does not differ significantly from the magnetorheological fluid durability.

Numerical analysis of the mandibular reconstruction with the use of autogenous bone graft and dental implants

Miodowska, Justyna, Kromka-Szydek, Magdalena, Bielski, Jan, Jędrusik-Pawłowska, Magdalena
Article
2016
The article refers to some issues of the mandible reconstruction in the region of chin with the method involving dental implants introduced for teeth restoration. 12 models are created, which take into account three different graft materials (iliac crest, fibula and rib) and two various implant lengths (13 and 18 mm). The authors try to answer the question how the parameters of the introduced implants affect the distribution of the strain intensity in the mandible, both in the implantation area and at its border with autogenous graft. Also, the distribution of equivalent stress in the reconstruction plate and dental implants is analyzed.

Calculating geometric parameters for industrial robot gripper mechanism according to the assumed functional characteristics

Krenich, Stanisław
Article
2016
The paper presents an approach to optimal synthesis of robot gripper mechanism. There are two different patterns of force and displacement functional characteristics applied. The first one deals with the assumed linear or nonlinear displacement of the gripper ends, whereas the second one takes under consideration the constant value or nonlinear chart of the gripping force. In order to generate the optimal solutions a gradient based method, a random search method and an evolutionary algorithm are used. The obtained results show relatively good effectiveness of the proposed optimization approach in comparison to conventional methods of synthesis of linkage mechanisms. The best solutions were generated by the evolutionary algorithm based method; worse by the random search algorithm. Gradient based method fails during optimization process and should not be used for such type of problems, especially described by trigonometric functions.

Application of the direct spectral method to cycle identification for multiaxial stress in fatigue analysis

Kozień, Marek S., Smolarski, Dariusz
Article
2016
In the article, the means of application of the direct spectral method for the identification of the stress cycles for multiaxial stress is discussed. Two cases are analyzed. The first, when components of stress tensor are in phase, and the second, when they are shifted in phase. The second case is associated with the practical application for the crane wheel.

Rope-free multi-cabin elevator system for vertical and horizontal transport and simultaneous integration of movement in two directions

Huścio, Tomasz, Trochimczuk, Roman
Article
2016
This article presents a novel rope-free multi-cabin elevator system for vertical and horizontal transport and simultaneous integration of movement in two directions. Using the patent applications to the Patent Office of the Republic of Poland, the structure and the principle of operation of the rope-free elevator is presented. The advantages of using the mechatronic rope-free multi-cabin elevator in novel, multi-area high rise buildings are presented. The directions of further studies are outlined.

Volcanic tuff as an inhibitor of corrosion in aqueous environment

Hebdowska-Krupa, Maria, Łach, Michał, Mikuła, Janusz
Article
2016
The aim of the studies was to examine the applicability of volcanic tuff as a corrosion inhibitor in aqueous systems and to identify the mechanisms owing to which the tuff is acting as an inhibitor of corrosion. The scope of research includes: examinations of the structure and selected properties of the tuff from Filipowice, including fractographic examination of the Filipowice tuff rocks, X-ray diffraction analysis, and thermal analysis; study of the corrosion resistance of DC01A low-carbon steel in aqueous systems without and with inhibitor, which is volcanic tuff.

Hydraulic hybrid vehicle with energy recuperation

Gawlik, Artur, Sobczyk, Andrzej, Walczak, Paweł
Article
2016
Modern transport vehicles and mobile machines have a high advanced functionality and quality of work. However, it is often associated with high power consumption. That is why research focused on reducing vehicle operating costs is so important. The possibilities of reduction of fuel consumption in combustion engines, which are usually the primary source of energy in many vehicles, seem to be exhausted. It came from design constraints of the combustion engine and increasingly stricter emission’s standards. That is way very popular become energy recovery system. Usually, these systems are based on an electric storage battery. Energy is capturing during braking of the vehicle and transferred to the electric motor periodically connected with the drive system. While, in the vehicles driven by hydrostatic system hydraulic energy in a similar way can be captured and stored in the hydro-pneumatic accumulator. This paper presents such solution of energy saving system based on an additional pump and hydro-pneumatic accumulator build into vehicle hydrostatic drive system. Mechanical and hydraulic elements of vehicle drive system were modelled using SimulationX software. The standard drive system is comparing with the energy recuperation drive system. Tests have been conducted for assumed working cycle and several operating parameters by the use of SimulationX. Reached than 10% energy saving in one cycle, confirms the correctness of designed structure of the hydraulic energy recovery system.