Validity and Reliability of Green Competencies Instrument for Automobile Technology Programme Using Rasch Model

This article aims to determine the validity of developed constructs and check the reliability of the newly developed instrument named as Questionnaire on Green Competencies for Automobile Engineering Technology (QGCAET) for the Automobile Technology Programme in Nigerian Universities. The instrument consists of 170 elements measuring four constructs namely Technical Green Competencies; Managerial Green Competencies; Personal Green Competencies and Social Green Competencies and was administered to 299 respondents made of Lecturers, Technologists and Final- Year Students of Automobile Engineering and Technology programme in Nigeria universities. The Rasch model was used to examine the validity and reliability of the items. From the analysis point of view, the polarity of the elements indicates that the correlation of the point measure (PTMEA CORR) of 170 elements of green competencies is between 0.00 and 0.55. The summary statistics show that the reliability of the items and the separation of the items of the green competencies instrument are 0.98 and 6.46, respectively. Similarly, the item reliability of each construct is between 0.96 and 0.99, and the reliability of the person is between 0.79 and 1.97, respectively. In terms of item fit statistics, a total of 157 items are found to be fit to achieve the objectives of the study. The result also indicates that the range of fit for the four (4) identified green competencies constructs is between 0.61 and 1.49 signifying that all the constructs are in harmony in measuring the items in the constructs, so suitable in achieving the objectives of the research.

Abaqus Simulation on Basalt Fibre Reinforced Polymer Epoxy Tube Subjected to Axial Compression for Energy Absorption

In practical application, fibre reinforced polymer (FRP) technology is implemented as the outer jackets in structural elements such as column, beam and in automobile engineering as light weight components in the head liners of car, brake pads and energy. In civil engineering FRP is mainly used in the retrofitting technique against corrosion, in columns, piles and poles. The research aims to provide a recyclable, natural, low-cost energy absorption material capable of increasing the load bearing capacity of the structure by increasing the fabric layer. The study focuses on the finite element analysis (FEM) of the energy absorption characteristics of basalt fibre reinforced polymer epoxy tube (BFRPE) subjected to axial compression with varying BFRPE layers. The results also discuss the failure modes of the specimens using abaqus. Parameters such as the energy absorption, crush force efficiency (CFE) are discussed. Energy absorption is defined as the area under the load displacement and CFE is defined as the ratio of the mean load to that of the initial peak force. The test results indicate that as the number of layers increases the ultimate load and CFE of the tube also increases. Compared to flax fibre reinforced polymer the thickness of the basalt fibre is very less with better energy absorption.

Biomimetic Designs for Automobile Engineering: A Review

Automobile engineering often demands creative and innovative concepts to achieve their performance and efficiency targets. However, the strategies used to create these concepts are evolving with time. Recently, heightened attention has been noticed to using biomimetic concepts in the field of automobile design. The studies that apply biomimicry to automobile design often exhibit improvements in vehicle performance and fuel efficiency. Consequently, biomimetic concepts have extended an opportunity to the automobile industry to generate futuristic designs with advanced technology. However, the innovations and inventions in biology are usually published with more complex terminology that is not convenient for the research community working on automobile engineering. Hence, a notable delay is present in transferring the recent discoveries in biology to engineering researches so that they can develop strategies to mimic them. The purpose of this paper is to provide a brief overview of the biomimetic design approaches that have been and can be used in automobile design. In addition, the paper includes a classification of biomimetic concepts, which reveals the current research interests and highlights the areas with a deficit of research that is required to be addressed extensively in the future.

FEA ANALYSIS OF CONNECTING ROD PROVIDED

Automobile engineering format has currently fussed majorly on the strain analysis and ??timiz?ti?n of ? ??nne?ting r?d with e?ger em?h?sis ?n the ?ru?i?l ??r?meters in?luding def?rm?ti?n, str?in, f?tigue ?nd strain, element s?fety, existen?e v?lues ?m?ngst ?thers. The ??nne?ting r?d is ? ?rim?ry hy?erlink intern?l ?f ? ??mbusti?n engine. It ??nne?ts the ?ist?n t? the ?r?nksh?ft ?nd is li?ble f?r tr?nsferring ??wer fr?m the ?ist?n t? the ?r?nksh?feet ?nd sending it t? the tr?nsmissi?n. The general overall performance ?f ? ??nne?ting r?d in ? ??r engine is stimul?ted with the res?ur?e ?f its l?y?ut ?nd weight. theref?re, f?r the ?r?du?ti?n ?f ? dur?ble, inex?ensive, ?nd light-weight ??nne?ting r?d, ev?lu?ti?n ?nd ??timiz?ti?n gr?w t? be ?riti??l. S?me ?rti?les ?ffer ?n ?ssessment ?f s?me ?ru?i?l ?rtw?rk ??rried ?ut utilizing v?ri?us rese?r?hers in designing, re?ding, ?nd ??timiz?ti?n ?f ??nne?ting r?d ?f ?n engine the us?ge ?f finite det?il ev?lu?ti?n in ?NSYS w?rkben?h ? ??m?lete ??m??ris?n desk ?nd gr??hs f?r the reviewed research ?rti?les h?d been ?r?vided. this ?rti?le will amusing?ti?n ?s ? ste??ing st?ne f?r each ?ntique ?nd new rese?r?her in the ?re? ?f ??r l?y?ut.

Definitions for Mechanical Engineering Textbook - Volume1 Authors

The objective of this book is to present important definitions from the subjects like Fluid Mechanics & Hydraulic Machines, Engineering Metrology & Measurements, Engineering Thermodynamics, Kinematics of Machinery, Mechanics of Solids, Manufacturing Technology and Automobile Engineering. The purpose of this book is to make students easier to understand the definitions and the students will be benefitted in various examinations.

Experimental evaluation of mechanical properties of friction welded mild steel

Friction welding is a solid state joining process used to join similar and dissimilar metals, not possible with other available welding techniques. Now a day’s Friction welding is most commonly used in industry that is aeronautical engineering, automobile engineering, submarine industry and heavy industry. In this research, an experimental setup was designed and fabricated in order to accomplish friction welded joints mild steel. Thereafter, the effect of forging pressures and rotation speed on the mechanical properties of friction welded ST 42 steels, produced by mechanical joining, have been investigated. Samples were welded under friction pressure 10 MPa by different forging pressures 25 MPa and 35 MPa with different rotation speed 1095 rpm, 1200 rpm, and 1400 rpm. The tensile strength values of the weldments were determined and evaluated. The top result is produced from sample were welded under forging pressures 35 MPa at rotation speed 1400 rpm that is tensile strength 437,27 N/mm2 and yield strength 399,75 N/mm2.Keywords : friction welding, forging pressure, tensile strength, yield strength, and elongation.

Integrated foreign languages teaching: a concept of the English language textbook for engineering majors

Since 2017 new state educational standards for higher education have been introduced and contain the fourth universal competence (UC-4) which refers to the notion “business communication”. In this relation, the paper considers the issue of creating an up-to-date English language textbook for engineering majors in compliance with the requirements of the new state educational standards according to the methodology of the integrated teaching of foreign languages. The author presents such concept emphasizing the fact that engineering majors – and automobile engineering majors in particular – lack modern professionally oriented textbooks of English. Research methods include: analysis of the requirements of the state educational standards, scientific sources on integrated foreign languages and professional disciplines teaching; modelling a concept of the English language textbook. The purpose of the present paper is to introduce a concept of the textbook according to the model of integrated foreign languages teaching as part of the methodology of integrated foreign languages and professional disciplines teaching. In this relation, the author clarifies the difference between the Russian methodology of integrated foreign languages and professional disciplines teaching and the European technology of Content and Language Integrated Learning (CLIL). The author describes features of three models of integrated teaching in Russia and gives grounds for choosing the “golden mean” – integrated foreign language teaching as the basis for creating professionally oriented textbooks of English. The research results include also the author’s introducing the notion of zones of near and further integration which are characterized by a different degree of content and competence integration into students’ learning professional disciplines and acquiring professional competences. The zones of integration help to differentiate the textbook for teaching professionally oriented General English and the textbook for teaching courses of professional English. The concept contributes to disclosing the previously proposed idea of the developing of the integrated foreign language professional communicative competence because it introduces principles for creating English language textbooks and their key components. Although the concept is worked out for creating textbooks of English for students of automobile engineering, but it may as well be applied for all engineering majors. The concept will be detailed as the textbooks are being created and piloted at the same time.

Multimedia Thesaurus: A Case of Designing and Prospects for Using in Engineering Education

The paper deals with the technology for the creation and use of an individual multimedia bilingual thesaurus as a tool for the integration of the foreign language and engineering disciplines at a technical university. The stages of designing and testing an individual thesaurus in vocational English language classes with students, majoring in automobile engineering, are described. Building on the achievements in thesaurus modelling in integrative foreign languages and professional disciplines teaching, the author presents her own technology for creating an individual English-Russian multimedia thesaurus, devoted to the automobile design, and the sequence of formation of speech skills in foreign language communication of engineers on its basis. The process of creating such thesaurus takes place at two levels of integration: intra-subject (interrelationship of all types of speech activity) and interdisciplinary (didactic synthesis of language and engineering disciplines). At the same time, the author outlines the areas of the near and further integration of the discipline «Professional English» and engineering disciplines, which is aimed at developing interdisciplinary thinking of engineering students. The author emphasizes the fact that successful teaching cross-cultural engineering communication requires outlining the content of learning situations, the modelling of which is the English language instructor’s responsibility. In order to organize this work, students are supposed to create a contextual part of the thesaurus from which the instructor singles out speech patterns. The selected speech patterns are mastered in a series of exercises and tasks prior to learning situations. The conclusion outlines ways of the further interdisciplinary integration by means of thesaurus modelling of professional subject areas.

Coefficient of friction of dry sliding Al 6061-T6 alloy under different loading conditions

Purpose This paper aims to focus on the effect of normal load, sliding speed and temperature on the coefficient of friction of Al 6061-T6 alloy under dry sliding conditions. Design/methodology/approach Dry sliding experiments were conducted using rotary type pin on disk tribometer. Pins with 3 mm radius of contact and circular disks of 165 mm diameter were fabricated to simulate Hertzian contact configuration. Experiments were conducted by applying three different normal loads (1, 1.5 and 2 kg) and three different sliding speeds (1.25, 2 and 3 m/s) at different temperatures [room temperature (31 ± 1 °C), 60 °C, 100 °C and 150 °C]. Findings Coefficient of friction at end of the first cycle of sliding, stabilized stage, unsteady state and steady state are reported elaborately in this study. Adhesive and abrasive wear mechanisms were observed in the dry sliding of Al 6061- T6 alloy contacts from the microscopic analysis of worn contact surfaces. The coefficient of friction was more influenced by the increase in normal load than the increase in sliding speed and temperature. Practical implications The results obtained from this study are significant for the design of aluminium-to-aluminium contacts in aerospace engineering and automobile engineering. Originality/value This study reveals the coefficient of friction of aluminium-to-aluminium (Al 6061-T6 alloy) contacts under cylinder on flat contact configuration.