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Article
Publication date: 1 March 1961

G. Pallett

This ‘g’ trouble is a widespread symptom of some basic misunderstandings in mechanics. Evidently it troubles the students at the Imperial College, as Mr Francis's article in the…

17

Abstract

This ‘g’ trouble is a widespread symptom of some basic misunderstandings in mechanics. Evidently it troubles the students at the Imperial College, as Mr Francis's article in the February issue indicates, as well as those hoping to gain certificates and diplomas in the technical colleges. In certain branches of study, structures and strengths of materials and other subjects largely based on statics, it can almost be forgotten. However as soon as dynamics arises, say in mechanics of machines, we are right in the ‘g’ muddle. Even here some students, by feats of memory, get by without resolving the confusions in their concepts of force and mass. In fluid mechanics there is no such way out. Viscosity units are arbitrarily expressed in either mass or force units (M L—1 T—1 or F T L—2) and still further these may occur in f.p.s., f.s.s. or c.g.s. and, if heat transfer problems enter, then time may be in hours.

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Education + Training, vol. 3 no. 3
Type: Research Article
ISSN: 0040-0912

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Article
Publication date: 1 July 1960

G. Pallett

A discussion of teaching points for the graphical construction, and the analytical energy methods

468

Abstract

A discussion of teaching points for the graphical construction, and the analytical energy methods

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Education + Training, vol. 2 no. 7
Type: Research Article
ISSN: 0040-0912

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Article
Publication date: 1 March 1960

G. Pallett

THE HOUNSFIELD TENSOMETER is a very popular machine amongst technical college staff and students alike. The latter soon appreciate the ingenuity and brilliant simplicity of its…

408

Abstract

THE HOUNSFIELD TENSOMETER is a very popular machine amongst technical college staff and students alike. The latter soon appreciate the ingenuity and brilliant simplicity of its design, and from the college point of view there is the low initial cost of the machine, the wide range of attachments for various tensile, shear, Brinell and slow bend tests etc. In addition, the small specimens are cheap to buy or produce and this makes it possible for small groups to carry out tests on a range of, say, carbon steels economically. A picture of the machine was given in Mr Easton's recent article.

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Education + Training, vol. 2 no. 3
Type: Research Article
ISSN: 0040-0912

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Article
Publication date: 1 February 1964

G. Pallett

Radiation Problems. A great deal of lecture time in this subject must be devoted to radiation configuration factors. As the integral for these quantities is usually exceedingly…

27

Abstract

Radiation Problems. A great deal of lecture time in this subject must be devoted to radiation configuration factors. As the integral for these quantities is usually exceedingly complex, analogue apparatus for obtaining easy solutions is essential. Figure 9 indicates two areas dA1 and A2 and it can be shown that the projected area S divided by the base circle gives the geometric factor. Figure 10 shows a simple piece of apparatus made at this College for obtaining the geometric factor. When using it and evaluating results, students are forced to think of the equation and its interpretation. Certain rectangular shapes are checked against graphical presentations in textbooks and unusual cases can be dealt with. For instance, to find the geometric factor for a standing person may increase a student's awareness of the variety of uses that exist. Another possible experiment, drawn from the research literature, is the study of furnace geometric factors using light as a heat analogue. A skeleton framework is constructed to the dimensions of the furnace and the furnace is represented by a number of lights behind diffusing sheets of frosted glass. The experiment is carried out in a darkroom — absorbing walls are left free and partially absorbing walls can be simulated by various shades of grey paint. The light incident on a wall is measured by a calibrated photo‐electric cell. In the original paper, cosine law corrections were made to the results, but it has been stated that the results are better without such corrections, and this means that a simpler and more effective demonstration can be made.

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Education + Training, vol. 6 no. 2
Type: Research Article
ISSN: 0040-0912

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Article
Publication date: 1 February 1960

G. Pallett

ALL COURSES on strength of materials and theory of structures deal in detail with the methods of finding slopes and deflections for beams carrying a wide variety of forms of…

38

Abstract

ALL COURSES on strength of materials and theory of structures deal in detail with the methods of finding slopes and deflections for beams carrying a wide variety of forms of loading. Yet frequently in experimental work the subject is unnecessarily restricted to verification of deflections caused by some relatively simple system of concentrated loading.

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Education + Training, vol. 2 no. 2
Type: Research Article
ISSN: 0040-0912

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Article
Publication date: 1 September 1959

G. Pallett

Since the war, technical college courses have widened tremendously. New subjects — automatic control, nuclear engineering, work study, etc. and, of course, liberal studies now…

37

Abstract

Since the war, technical college courses have widened tremendously. New subjects — automatic control, nuclear engineering, work study, etc. and, of course, liberal studies now have to be considered by our future technologists. In spite of day‐release schemes and the various types of sandwich course, it is not surprising that the time devoted to traditional studies such as theory of machines, strength of materials, and theory of structures has had to be reduced. With the tendency for teaching time to shrink, it is opportune for us to discuss efficient methods of presentation, revision of syllabuses, wider generalisation and a more unified scientific approach to the teaching of subjects which are, after all, branches of applied mechanics.

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Education + Training, vol. 1 no. 9
Type: Research Article
ISSN: 0040-0912

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Article
Publication date: 1 January 1964

G. Pallett

IN THE LAST few years the subject of heat transfer has been steadily gaining in practical importance. This is not only due to advanced researches in the fields of rocketry…

40

Abstract

IN THE LAST few years the subject of heat transfer has been steadily gaining in practical importance. This is not only due to advanced researches in the fields of rocketry, satellite re‐entry, and nuclear engineering, but also to extensive development work on more or less conventional equipment such as heat exchangers, transformers, alternators, chemical plant, etc.

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Education + Training, vol. 6 no. 1
Type: Research Article
ISSN: 0040-0912

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Article
Publication date: 1 June 1960

G. Pallett

THIS IS not an essay on the relative merits of the different methods of frame analysis, nor one which goes over method of sections, graphical analysis and other techniques which…

46

Abstract

THIS IS not an essay on the relative merits of the different methods of frame analysis, nor one which goes over method of sections, graphical analysis and other techniques which are adequately dealt with in a score of textbooks. Rather it is an attempt to draw attention to certain simple and fundamental ideas, to show how the student may be introduced to a range of frames in a very short time, to increase his understanding of the way they ‘work’ and also to enable him to solve frame problems by inspection if the geometric relations are easy. The latter is a useful and important examination technique.

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Education + Training, vol. 2 no. 6
Type: Research Article
ISSN: 0040-0912

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Article
Publication date: 1 May 1960

G. Pallett

“STRESS, STRAIN, elasticity and plasticity.” This impressive heading, or one very like it, can be seen in many introductory syllabuses in the subject of mechanical engineering…

17

Abstract

“STRESS, STRAIN, elasticity and plasticity.” This impressive heading, or one very like it, can be seen in many introductory syllabuses in the subject of mechanical engineering science. It is the purpose of this article to examine what it usually implies, and also what it could reasonably mean within the confines of an ONC or similar course.

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Education + Training, vol. 2 no. 5
Type: Research Article
ISSN: 0040-0912

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Article
Publication date: 1 March 1961

G. Pallett and J.D. Greenwood

That there are difficulties in introducing the subject of photoelasticity to engineering students is widely recognised. These difficulties are of two kinds — the student with whom…

22

Abstract

That there are difficulties in introducing the subject of photoelasticity to engineering students is widely recognised. These difficulties are of two kinds — the student with whom we are concerned seldom has a very deep knowledge of physics, although modern trends in technical education are doing something to rectify that. Secondly the traditional way of teaching strength of materials, with the emphasis on isolated topics (for example: stresses in beams, shear stress distribution, thick cylinders and the rest) makes it difficult for the links between these studies to be fully grasped, and the ‘field approach’ is never developed. The student practically has to relearn his elasticity before he can do any useful work.

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Education + Training, vol. 3 no. 3
Type: Research Article
ISSN: 0040-0912

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