A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Bhattacharyya, M.
- Engineers & Small Industries
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Journal of the Association of Engineers, India, Vol 82, No 3-4 (2012), Pagination: 15-22Abstract
The role of engineers inevitably is of vital importance in the Management of Industries- large, medium and small. In country like India where unemployment problem is acute, engineers who get their education at the expense of millions unfed, starved & deprived of all humanly rights, should exert their best in return to give some service to the nation, to ameliorate the distressing condition of the down trodden countrymen. Engineers should come forward in the revival of small industries which only can open up new vistas of employment to millions.
This paper gives an engineer's viewpoint regarding various difficulties in running small industries. It also calls upon the engineers to unite in fighting out corruption from their workplaces- an unthinkable idea at the present state of (anti?) national character; the work involves hazards as tough opposition from influential quarters shall be forthcoming.
- An Experimental Analysis of Hydrostatic Thrust Bearing
Authors
1 Mechanical Engineering Department, Jadavpur University, IN
Source
Journal of the Association of Engineers, India, Vol 81, No 1-4 (2011), Pagination: 95-103Abstract
Hydrostatic lubrication is a type of fluid lubrication where the bearing surfaces are kept separated by a film of fluid. The pressure which supports the load on the bearing is supplied to the film by an external source like pump, accummulator etc. Hydrostatic lubrication considerably reduces friction and wear and is of practical importance in applications where load is very high like radars, big telescopes, turbines, machine tools etc.
The present paper deals with design and development of a testing rig for the study of the pressure distribution, flowrate, load capacity and hence to optimize some of its design parameters.
- Investigation into Correlations of Weld-Hardness with Heat Input Rate for Arc Welded Butt Joints
Authors
1 Mechanical Engineering, Bengal Engg. and Science University, Shibpur, Howrah-3, IN
2 Mechanical Engineering, Jadavpur University, Kolkata-700032,, IN
Source
Journal of the Association of Engineers, India, Vol 79, No 1-4 (2009), Pagination: 32-39Abstract
An attempt has been made to establish the correlations of weld-hardness with heat input rate using standard statistical techniques of regression analysis. To achieve the objective, 24 welded samples fabricated from hot rolled structural steel (carbon percentage varying from 0.17 to 0.22) plates (10 and 12mm thick) were used in the experiment. The samples were rectangular plates (750mm x 600mm x 10-12mm), single-V butt joint, manully arc welded, using multiple runs.
The best-fit equations thus obtained can be used to predict the weld-hardness corresponding to the least value of heat input rate, the weldments being as sound as the base metal.
- An Ode to Nature
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Journal of the Association of Engineers, India, Vol 78, No 1-4 (2008), Pagination: 4-4Abstract
The day Comes. It bringeth the wind of joy, the sea of sorrow, the deluge of devastation! The day crawls. Humans invoke it in their race for a quality & prosperous life!- Risk Management: A Loud Thinking
Authors
1 The Association of Engineers, IN
Source
Journal of the Association of Engineers, India, Vol 75, No 1-4 (2005), Pagination: 15-16Abstract
Risk management requires a set of sincere mindset ready to act & to act needs trained mind. Conventionally management is directing the resources to the desired end; in this case not to allow any activity which may invite risk and/or to plan the activity to be performed safely without any risk to life and property. On the contrary all engineering activities have some risk-elements, only the quantum varies; therefore, activities barely nessary for living should be carried out. Unfortunately the standard of living is measured against, per capita consumption of electrical energy, steel, water etc. The more the per capita consumption die better the standard of living and so there is a mad race in this direction. Have we ever thought that nothing hails from zero. We are ever increasingly denuding this beautiful planet of ours-eg. to cite a few cases, in the lat 40 years millions of barrels of crude oil raised, everyday millions of tons of coal mined, ruthless lifting of underground water, felling of trees and all these leave void spaces which are showing their teeth in the form of quakes, floods, droughts, floods and so on. Mohatma Gandhi said, "Nature has enough for everybody's need, but not for greed."- Maintenance Strategy:Angel of Victory Atop the Victoria Memorial Hall, Calcutta
Authors
1 Jadavpur University, Calcutta-700032, IN
Source
Journal of the Association of Engineers, India, Vol 86, No 3-4 (2016), Pagination: 28-34Abstract
'Old order changeth yielding place to new'. 'Old is gold'. Are these two proverbs contradictory Let one answer the way one likes.
Materials and practices of yesterdays are not same as that of to-days and certainly not of tomorrows. And sentiments persist for time immemorial. Science advances, technology leaps, but sentiments remain still. Joys and sorrows, virtues and vices, victories and defeats are preserved through monuments, books, sculptures and scriptures. The civilization-past, present and future- exists through the archeological preserves and the like. Such a piece of fine art is the Victoria Memorial Hall (Fig 1) located at the heart of the metropolis of Calcutta, which was believed to be constructed by the British Raj with the futile attempt to make another Tajmahal in scenic beauty and glamour. The Tajmahal, however, remained in the hearts of thousands as ever with all its candid beauties and glamour. Question automatically rises, "Is the Victoria Memorial Hall a total failure ?" Certainly not, it is also a good piece of construction in its own way amidst the lush greenery and a number of well maintained tanks, at the centre of picturesque gardens.
- Occupational Health & Safety Training Programme
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Journal of the Association of Engineers, India, Vol 73, No 1-4 (2003), Pagination: 10-10Abstract
Safely, Health & Eviron (SHE) Awareness is gradually percolating the Nations at large through a strange paradox. While we strive hard to consume more and more, we also think of environmental protection. The simple truth that nothing hails from zero industrial activities, is often lost sight of. Each industrial activity unleashes some form of pollutants, may be magnitude varying. When will human conscience be aroused, WANT NOT, WASTE NOT?.Full Text
- Value Engineering : Case Study
Authors
1 Jadavpur University, IN
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Journal of the Association of Engineers, India, Vol 63, No 1-4 (1988), Pagination: 11-14Abstract
The term Value Engineering is not very old and the conscious use of this technique in different aspects of manufacturing operations starting from the very first design stage to the finishing operation is comparatively recent although the principles and practices involved in Value Engineering have been used since the Industrial Revolution without reference to the subject as such.- Terotechnology : An Engineer's Overview
Authors
1 Jadavpur University, Calcutta-32, IN
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Journal of the Association of Engineers, India, Vol 62, No Spl (1987), Pagination: 5-9Abstract
Terotechnology is a tool for cost effective performance of an organisation. It's overall objective is to obtain the best value for money spent on production venture at all stages i.e. to optimise within its own system which requires the existence of physical resources capable of meeting the quality and quantity demands of production at minimum whole-life cost which in turn is the sum total of
(i) the initial capital cost,
(ii) the maintenance and repair cost, and
(iii) the worth of lost production due to breakdown or substandard performance minus the final scrap value.
- Maintenance Strategy : Angel of Victory Atop the Victoria Memorial Hall, Calcutta
Authors
1 Jadavpur University, Calcutta-700032, IN
Source
Journal of the Association of Engineers, India, Vol 62, No Spl (1987), Pagination: 50-57Abstract
'Old order changeth yielding place to new'. 'Old is gold'. Are these two proverbs contradictory ? Let one answer the way one likes.- Computer-Based Study on the Estimation of Residual Stresses
Authors
1 Mech. Engg. of B. E. College, Shibpur, IN
2 Mech. Engg. of Jadavpur University, Calcutta, IN
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Journal of the Association of Engineers, India, Vol 60, No 1-4 (1985), Pagination: 17-22Abstract
In the present study an attempt has been made to find out some correlation between the residual stresses with various welding parameters using dimensional analysis. The equations thus derived when used for finding out the residual stresses yield results which are in reasonable agreement with the measured ones for all practical purposes.- Residual Stress in Weldments : Feasibility of its Determination by the Non-Destructive Method Based on Directional Hardness
Authors
1 Jadavpur University, IN
2 Jadavpur University, Calcutta, IN
3 Bengal Engineering College, Sibpore, Howrah, IN
Source
Journal of the Association of Engineers, India, Vol 59, No 1-4 (1984), Pagination: 25-28Abstract
In the present work an attempt has been made to determine residual stresses in weldments both by a non destructive non-conventional method based on directional hardness (indentation method) testing and by the destructive conventional method of stress relaxation. Residual stresses thus obtained in both the methods are compared; the causes of variation of stresses are explained.- Presidential Address
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Journal of the Association of Engineers, India, Vol 57, No 1-4 (1982), Pagination: 10-10Abstract
Hon'ble Sree Provash Roy, Minister-in-Charge, Irrigation & Waterways Dept., Govt. of W. B., Dr. B. Sen, Director of Technical Education, W. B., Dr. S. R. Das, Director-General, National Test House, Delegates, Menbers, Ladies and Gentleman :
Our President Dr. R. K. Chakrabarti is at present in the United States and therefore as the senior most Vice-President I am to deliver the customary presidential address.
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- On Computer Aided Design
Authors
1 Mechanical Engineering Deptt., Jadavpur University, Calcutta-700 032, IN
Source
Journal of the Association of Engineers, India, Vol 57, No 1-4 (1982), Pagination: 23-32Abstract
In this paper an attempt has been made to explain computerised design with the aid of a simple illustration. The illustration has been so prepared that it exposes one to the hazardous design made by the computer when the design logic fed to it is a little bit erratic. In conclusion, it has been clearly shown that a computer is no substitute for a designer and the apprehension that due to computer aided design the role of designer is waning is absolutely baseless.- On Foreign Collaboration
Authors
1 Mechanical Engineering Department, Jadavpur University, IN
Source
Journal of the Association of Engineers, India, Vol 53, No 4-1 (1978), Pagination: 179-181Abstract
Foreign collaboration in any form whatsoever may be thought of after the local possibilities have been used up to the fullest extent. It is a matter of regret that for anything and everything a nation is inclined to explore the possibility of Foreign assistance; does it not reveal that the growth has been parasitic in pattern? What is more astounding and fallacious is that more than often the collaboration decision is being taken at the administrative level without taking the opinion of the technical personnel in cognizance.- On the Defects and Inspection of Welded Vessels
Authors
1 Dept. of Mech. Engg., Jadavpur University, IN
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Journal of the Association of Engineers, India, Vol 52, No 3 (1977), Pagination: 173-177Abstract
Welding, because of certain obvious advantages it offers, has been very rapidly replacing the conventional methods of fabrication used in the manufacture of vessels to stand pressures, low, medium and high. This change over to a newer fabricational technique since the Second World War calls for elaborate and extensive testing methods for defects to overcome the natural human resistance to adopt the non-conventional technique.In this review paper, an attempt has been made to highlight the probable defects generally met with in welded vessels along with the inspection techniques.
- On Resistance Butt-Welded Steel Specimen
Authors
1 Mechanical Engineering Deptt., Jadavpur University, IN
Source
Journal of the Association of Engineers, India, Vol 52, No 2 (1977), Pagination: 87-93Abstract
Resistance Welding produces welds with a coarse grain structure which is regarded by some as a potential weakness from the brittle fracture viewpoint. Refinement of this structure is produced by normalising. Heat-treatment is an attractive proposition for both stress relieving and the improvement of the metallurgical condition in the HAZ of the weld.- An Experimental Analysis of Hydrostatic Thrust Bearing
Authors
1 Mechanical Engineering Department, Jadavpur University, IN
Source
Journal of the Association of Engineers, India, Vol 50, No 3-4 (1975), Pagination: 91-97Abstract
Hydrostatic lubrication is a type of fluid film lubrication where the bearing surfaces are kept separated by a film of fluid. The pressure which supports the load on the bearing is supplied to the film by an external source like pump, accummulator etc. Hydrostatic lubrication considerably reduces friction and wear and is of practical importance in applications where load is very high like radars, big telescopes, turbines, machine tools etc.- An Experimental Study of Welded I-Section Beams
Authors
1 Mechanical Engineering Dept., Jadavpur University, Calcutta-32, IN
Source
Journal of the Association of Engineers, India, Vol 50, No 2 (1975), Pagination: 43-47Abstract
Needless to mention that welding is one of the most important versatile tools used in fabrication industries. Therefore, the Study of the different welded designs is of utmost importance to explore the possibility of welded designs in replacing the traditional ones. An experimental model with welded I-section beams has been designed for a systematic study to compare the stresses & deflections, experimental & theoretical.- Optimization of Recess Diameter to Bearing Diameter Ratio in a Hydrostatic Thrust Bearing
Authors
1 Mechanical Engineering Dept, Jadavpur University, Calcutta-32, IN
Source
Journal of the Association of Engineers, India, Vol 49, No 1 (1974), Pagination: 17-20Abstract
The present paper is an attempt to find out the recess to bearing diameter ratio in a circular hydrostatic pressure pad for the optimum pumping power, the ratio has been found out at different loads and film thick.- Research, a Solution; Research, a Problem
Authors
1 Jadavpur University, Calcutta, IN
Source
Journal of the Association of Engineers, India, Vol 48, No 2 (1973), Pagination: 6-9Abstract
For underdeveloped countries like ours where we are in acute shortage of nearly all commodities for mere living, we have to try to explore new ideas and means to fight with the scarcities. This fight, which otherwise threaten the mere existence in strictly literary sense, has got to be systematic and well disciplined towards a purposeful goal. Turning to our motherland, it would be a piece of sheer lie to show anything in excess of what is needed for our mere existence other than the humancounts along with the alarming rate of reproduction.- Welded Design
Authors
1 Department of Mechanical Engineering, Jadavpur University, IN
Source
Journal of the Association of Engineers, India, Vol 45, No 3 (1970), Pagination: 107-109Abstract
The welded design means design of equipments using welding as one of the principal fabrication methods. Of course, care must be exercised to note that welding is not used beyond the strength requirement of the joint. While going for welded design, the following points are to be specially remembered.- Seminar on Terotechnqlogical Impact on Equipment Design:An Appraisal
Authors
1 Mech. Engg. Department Jadavpur University Calcutta, IN
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Journal of the Association of Engineers, India, Vol 64, No Spl (1988), Pagination: 17-24Abstract
Level of technology in uie, io a society ia manifested in its competitiveness in the international matket. In other words, export petformance of a country is an indirect, but dominant index of appropriateneu of technology in the production system though admittedly other economic factors like availability of resources, both natural and human, also play vital role. Let one look at India from this perspective. Once a leading exporter of tea and jute, India loses in the face of competition from other countries. India's share in the total volume of international trade is only a miniscule 0.4 percent to>day as against 4 percent in 1960's and about 50 percent upto the end of the 17 th century. "Indians were famous for their reliability, honesty, truthfuineas, skill and diligence"—so goes the report of the Industrie Commission1 set up by the then British Government in 1916.References
- Report of the First Industries Commission, 1916, Govt, of India.
- Reserve Bank Bulletins (1987-88)
- The Statesman of 11. 11. 88, Calcutta.
- Half-yearly Report of Reserve Bank of India, August 1988.
- Tenth Anniversary Special Issue, April 30, 1988, Business India.
- Design, Development and Manufacture of Friction Welding Machine and its Performance
Authors
1 Mechanical Engg. Dept. Jadavpur University, Calcutta 700032, IN
Source
Journal of the Association of Engineers, India, Vol 64, No Spl (1988), Pagination: 41-56Abstract
Friction Welding is of recent origin. In India it is not used in production and in fact friction welding machines are not being manufactured in our country. A group of five students affinal year Mech. Engg. Dept., designed and manufactured a friction welding machine as a part of their project work in the academic session 1985- 86. Although the machine was functioning, it had various shortcomings. The present paper is concerned with the development of a better friction welding machine and its manufacture. Specimens of similar and dissimilar metals have been welded in this machine and test reports of the welded specimens are also shown- Admittedly, there is scope for further improvement in the machine which will constitut work for the future investigation.References
- Mody D. S., Friction Welding, Indian Welding Journal, July, 1978.
- Das P. K., et al. Project Report on Friction Welding, 1982.
- Das D. K., Design and development of a friction welding machine and its performance testing. M. E. Project report being submitted.