Contriving and Assessment of Magnesium Alloy Composites Augmented with Boron Carbide VIA Liquid Metallurgy Route

In modern engineering low-density composites plays a vital role of which magnesium alloys are very effective due to its high strength with better corrosion resistance and neat cast ability. In this work a micron sized Boron carbide ceramic (B4C) of about 100 microns is diffused as a reinforcement with AZ91 for preparing a magnesium metal matrix composite (MMMC) through stir casting route. A modified pit furnace setup is used for doing stir casting with varying volume fractions of 0％ and 3% of boron carbide for doing the composites. Furthermore mechanical and metallurgical properties like Tensile test is made through universal testing machine, Micro-hardness through Vickers hardness tester and Micro structure through Optical Microscopy is done for investigation.

Leadership lessons for engineers

The purpose of this study is to describe a MSc course aimed at preparing the elite of engineering education, providing knowledge, developing skills and experience that will allow graduates of Master degree programs not only to find a job, but also to build a successful professional career and a happy life consciously. The presented masters course introduces the best practices of leadership development from the rector of KNRTU-KAI, Albert Gilmutdinov (20122021) (based on his book Leadership Lessons), advanced experience in the development of leadership skills from Russian and foreign universities, as well as a unique American teaching methodology aimed at the peculiarities of training engineering personnel. The study reveals the problems of training modern engineering specialists: engineering student negative attitudes (I cannot learn English, it is too difficult to apply for a grant, an interesting job can only be found by acquaintance); inability of young people to answer questions about how to find a job in their life, how to work hard and not get tired, how to become successful and at the same time maintain good relations with people. The team of authors of the course believes that the results of the implementation of the Leadership Lessons project can be of professional interest not only among masters students, but also among all students of engineering schools, increasing the personal activity of students, their demand in the labor market, as well as strengthening ties between employers and the university.

Layer Adhesion Test of Additively Manufactured Pins: A Shear Test

Additive Manufacturing (AM) became a popular engineering solution not only for Rapid Prototyping (RP) as a part of product development but as an effective solution for producing complex geometries as fully functional components. Even the modern engineering tools, such as the different simulation software, have a shape optimization solution especially for parts created by AM. To extend the application of these methods in this work, the failure properties of the 3D-printed parts have been investigated via shear test measurements. The layer adhesion can be calculated based on the results, which can be used later for further numerical modeling. In conclusion, it can be stated that the layer formation and the structure of the infill have a great influence on the mechanical properties. The layers formed following the conventional zig-zag infill style show a random failure, and the layers created via extruded concentric circles show more predictable load resistance.

INNOVATIVE THREAD METHOD THROUGH CYLINDRICAL HOLES

Innovative activity in the field of engineering and technology, based on the use of best practices, contributes to scientific and technological progress in production. The latest projects in the field of technology significantly increase the technical and economic performance of enterprises. Innovative technical solutions of production nature significantly improve the structure and quality of production. Given the level of the proposed technological changes in the manufacture of threads in through holes, these innovations cover the field of combinatorial and partial. Today mechanical engineering is characterized by mechanization and automation of technological processes, a wide range of products of various parts. Among the non-detachable and detachable joints of parts, the threaded connection is the most common. Simplicity, reliability, the ability to adjust the force with which the conjugate surfaces come into contact, the possibility of repeated cycles of disassembly and assembly, etc., make this type of connection the most commonly used in mechanisms and machines of modern engineering. With the simplicity of the contact pair of threaded joints, where one of them contains the outer and the other the inner screw surface, during their manufacture there are problems that significantly inhibit production. The subject of research of this article is the solution of difficulties of manufacturing of an internal cut in through openings of small diameter by means of a tap. According to various sources, up to 80% of marriage is due to breaking taps. Studies by a group of scientists has found that more than 75% of taps break when the reverse (reverse) stroke of the tap, when the torque reaches its maximum value. The reverse scheme of production of a screw profile of a cutting surface by means of the mechanized devices and their alternative analogs, and also machines of drilling group, is offered.

Coercimeter for non-destructive control of solid alloys

The widespread use of solid-alloy tools in modern engineering makes it necessary to ensure and maintain quality in the process of their production. The use of hard alloy plates of inadequate quality results in the instability of the mechanical processing and, as a consequence, the quality of the processed products in the batch is reduced. Heterogeneity of structure and properties is a significant disadvantage of products of cermet solid alloys as a product of powder metallurgy. They must therefore be subject to 100 per cent quality control. Today, various methods are used in order to control the physical and mechanical properties of products, such as hardness and microhardness of the surface and surface layer. Non-destructive control methods, one of which is a magnetic method based on measurement of the coercive force of an article, are of high priority and potential. A coercimeter instrument is proposed to implement this method. This research gives a description of the principle of its work, the functions performed by individual nodes, their electrical circuits and possibilities.

Hydraulic engineering analysis of Roman water infrastructure: a review of practice and possibilities

A short review is presented covering English-language publications where quantitative engineering analysis has been used to study and gain insight into how ancient Roman and Mediterranean water systems functioned. The review covers work on using technical engineering perspectives to try and understand the geometrical layout of water systems, quantitative work of a type readily accomplished by undergraduate civil engineering students, such as calculating the flow capacity of aqueducts and other conduits of known dimensions, and more involved studies using computational techniques usually applied by specialist engineers in research or industry. It is concluded that the many different levels of analyses employed have given insight into how Roman water systems worked, for example the amount of water they delivered, and the kinds of issues their designers and operators might have faced. It is hoped that this review will inspire further interdisciplinary study in Archaeohydrology, using modern engineering techniques to amplify and extend the story of Roman water systems told by archaeologists.

Foundation engineering for offshore gravity structures

Gravity based structures are in play from early times. Numerous structures are being installed around the globe. These structures had shown a rigid face towards the harsh conditions/situation in the offshore environment. The key factors for sustainability are geotechnical design and the sub soil survey. These structures are used for collection, transport and also for temporary storage of crude gas and oil. These structures serve as a bridge between the much need fuel and the modern world. The installation of GBS involves major wings of modern engineering i.e. Mechanical, Structural, architecture and Geotechnical engineering because these structures are a great challenge as considering the harsh and hard off shore conditions. These structures are having a much importance apart from its features i.e. from the point of economy, as the oil prices are touching the heights, it influences construction of GBS. Now a days most of the multinational companies are focusing towards the construction of offshore GBS, as well as paying much attention on research work off these structures because to make huge profit. In this paper an effort has been made to understand the different aspects which are related to GBS i.e. pre-construction operations, soil investigation, construction, installment and some of the safety aspects as considering it one of the most focused topics now and in future.

Probabilistic Analysis of Wheel Loader Failure under Rockfall Conditions Based on Bayesian Network

Rockfall is one of the most serious geological hazards in mountain regions. During the rescue situations after rockfall, the wheel loader, a vital type of modern engineering mechanism, plays an important role in relieving the obstruction of the catastrophic site. Increasing the reliability of the wheel loader during the rescue situation is quite important. This study aims to build a fault diagnosis model based on Bayesian network (BN) to diagnose the probability and path of the fault occurrence in the wheel loader during a rockfall disaster. Meanwhile, to reduce the influence of subjective factors, the fuzzy set theory is introduced into BN. The result showed that the probability of failure of the wheel loader under rockfall disaster is 13.11%. In addition, the key cause of the failure of the wheel loader under the rockfall disaster is the malfunction of mechanical parts. The probability of mechanical component failures in this case is as high as 88%, while the probability of human error is 6%. The research results not only show the ability of the BN to incorporate subjective judgment but also can provide a reference for fault diagnosis and risk assessment of wheel loaders under rockfall disaster conditions.

Inverted pyramid Azores - an eternal hybrid structure

Engineering structures are designed with observation of rules for structural performance under specific design loads, defined in the so-called structural codes. While dead loads are directly dependent from the selection of structural materials to a given structural function, live and accidental loads are often linked to the region where the structure must perform. In a complete opposition to engineering principles in Ancient Egypt, the inverted pyramid was designed to become a statement of how to bend gravitational laws, and what can be achieved by modern engineering, sill with intelligence to fulfill its function in a region where engineering structures are subjected to extreme live and accidental load regimes, e.g. high risk of earthquakes and high wind seasonal loads. A hybrid structural concept was specified, comprising lightweight structural wall elements anchored to a relatively heavyweight structural core. The suggested design concept fulfills the global equilibrium equation defined by architecture, and should become a structural example from a structural design perspective. As any other project involving non-comprehensive geometry, design and construction of the inverted pyramid is highly sensible to management options, which shall assure high precision manufacturing, and accurate control of its production.