Design and development of high load Brinell hardness standard machine at UME

After successful implementation of two hardness standardizing machines at TSE (Turkish Standards Institution) in Rockwell and Brinell-Vickers hardness scales separately and deciding to combine them in one machine with a newer design and install it in Hardness Laboratory of UME (National Metrology Institute of Republic of Turkey) it was planned to design and develop a deadweight type Brinell Hardness standard machine at UME for high load scales within the scope of an internally funded project. In this paper the design of High Load Brinell Hardness Standard Machine with dead weight force application system realized by UME Hardness Laboratory is explained.

Design Criteria of Soft Exogloves for Hand Rehabilitation-Assistance Tasks

This paper establishes design criteria for soft exogloves (SEG) to be used as rehabilitation or assistance devices. This research consists in identifying, selecting, and grouping SEG features based on the analysis of 91 systems that have been proposed during the last decade. Thus, function, mobility, and usability criteria are defined and explicitly discussed to highlight SEG design guidelines. Additionally, this study provides a detailed description of each system that was analysed including application, functional task, palm design, actuation type, assistance mode, degrees of freedom (DOF), target fingers, motions, material, weight, force, pressure (only for fluids), control strategy, and assessment. Such characteristics have been reported according to specific design methodologies and operating principles. Technological trends are contemplated in this contribution with emphasis on SEG design opportunity areas. In this review, suggestions, limitations, and implications are also discussed in order to enhance future SEG developments aimed at stroke survivors or people with hand disabilities.

THEORY AND CALCULATION OF ROAD BRIDGES BURIED ABUTMENTS BASES

Buried abutments are most broadly applied in connections of road bridges structures and approach embankments. Embankment and cone weight force influence is the peculiarity of buried abutments bases and foundations constructions conditions of stability and deformation. There is in the article a description of road bridges buried abutments bases engineer calculation method including the complex of limit state checkings and grounding of calculation schemes. The calculations fulfil by calculated schemes of hard-plastic midst theory (on the base of prof. G.M. Shakhunjantc horizontal strengths method) and linear deformation (or elastic-plastic) midst theory. Table data necessitated for calculations are quoted. A way for define the strains in buried abutments bases from cone and approach embankment by the linear deformation midst theory is elaborated by means of making conventional (equivalent) calculated scheme. Non-weighting layer is added to the base, acting load is substitute by equal by value half-endless strip. By it on the real level of base arise normal and tangent strains, conformed with the form approach embankment restricted by slopes from three sides. It is suggested a method of buried abutment base soils stability calculation by the More-Coulomb equation, realizing by mean of strains, obtained in accordance with above descripted way.

Practical School Experiments with the Centre of Mass of Bodies

The concept of the centre of mass of a rigid body as a virtual point where the weight force acts is not easy to understand without a number of supporting school experiments. In school practice, however, experiments onthis topic are often limited to a few of the simplest cases in which a simple flat body, such as a triangle or rectangle, is hung in two or mostly three directions to show where the corresponding plumb lines intersect. Typically, simple wooden bodies are used, on which the plumb lines are already drawn through the centre of mass. However, such experiments can be boring for students and are probably insufficient to illuminate all aspects of the topic. Furthermore, if the experiments are only demonstrated by the teacher rather than being performed in groups, the opportunity to train students’ skills and develop nature-science competences is missed. We therefore prepared and performed a series of group experiments in logical sequence for students of the 8th and 9th grades of primary school, so that their full active participation was invoked. The experience with such an experiment setup with very simple equipment, together with the open discussion of results, increased pupil motivation for physics and perhaps also improved understanding of some physics problems regarding the centre of mass, even for younger students.

Eccentric Loading Condition Analysis of 1MN Dead Weight Force Standard Machine

With the development of science and technology , the position of the strength measurement[1] in national economic development is more and more important, In recent years, along with the computer technology, electronic technology and the development of numerical control technology, force standard machine also obtained the rapid development[2-6],dead weight force standard machine strength measuring accuracy is the highest power source device by far, in the process of weight loading, considering the axial load affect the performance of the whole machine and in order to guarantee the machine safe and reliable, it is necessary to eccentric loading conditions for mechanical properties analysis.

Research on Car Weighting Test System

The car weighting test system provides a good method to improve the comfort felt in car by passengers. It uses force sensors to measure the car load based on a optics-mechanical system that measure the displacement of an steel part which is proportional of the applied weight force.