Browsing CoA. Notes: Materials (1963-1969) by Publication Date

Characteristics of the high temperature mechanisms of creep and recovery in graphite: part 1

College of Aeronautics, (Cranfield) (College of Aeronautics, 1963-08)

An apparatus has been developed for determining the high temperature creep and recovery characteristics of graphite by applying torsional stresses to thin-walled tubes. This method has the advantages of a simple stress ...

An examination of the methods of mixing peroxides into polythene to form polymer networks

Stuart, J. M. (College of Aeronautics, 1963-10)

In the production of peroxide cross-linked polyethylenes it is customary to introduce the organic peroxide by the hot milling process. Inevitably some peroxide is lost by volatilization and the process is, therefore, ...

Characteristics of the high temperature mechanisms of creep and recovery in graphite: part 2

College of Aeronautics, (Cranfield) (College of Aeronautics, 1964-02)

,The research reported in this document has been made possible through the support and sponsorship of the U.S. Department of the Army throlleh its European Research Office. This report, not necessarily in final form, ...

Anisotropic creep in a glass-fibre laminate

Kaye, A. (College of Aeronautics, 1964-04)

A glass fibre epoxy resin laminate was prepared from a flexible thermosetting resin and a 'plain weave' glass cloth. Experiments in simple tensile creep were carried out on strips cut with their long dimensions at various ...

Some reactions of perfluoroglutaric acid

Smith, D. A. (College of Aeronautics, 1964-11)

Perfluoroglutaric acid when reacted with methyl magnesium iodide affords 2,6 diol 2,6 dimethyl hexafluoro pyranI in high yield and 4-one, 1,2,3 hexafluoro caproic II acid in low yield. The former material appears to ...

The influence of the static and dynamic characteristics of power sources on the behaviour of short circuiting CO2 shielded welding arcs

Pierozeck, B. S. (College of Aeronautics, 1965-02)

The work discussed in this report has examined, oscillographically, the influence of variable slope and variable inductance on the characteristics of short circuiting CO2 shielded metal arcs, and the variables affecting ...

Some aspects of the thermal degradation of epoxide resins. Part 1

Stuart, J. M.; Smith, D. A. (College of Aeronautics, 1965-03)

This Note contains a review of previous work in the field of pyrolytic degradation of epoxide resins, and a description of the development of an instrument for this purpose, using the principle of gas chromatography. The ...

Rolling recrystallisation textures of commercial grades of low carbon steels

Flavell, T. (College of Aeronautics, 1966-02)

The work in progress concerning the study of rolling-recrystallisation textures in commercial grades of low-carbon steels is outlined, the influence of aluminium nitride precipitation and recovery phoenomena being the ...

The effect of varying strain-ratio on the hydraulic bulging behaviour of aluminium sheet

Bott, Charles H.; Pearce, Roger (College of Aeronautics, 1966-11)

Annealed commercial-purity aluminium sheet was cold-rolled up to 32%, and the effect of this treatment on the strain-ratio (r) in various directions in the sheet plane was evaluated. Up to approximately 16% cold ...

A study of the thermal degradation of an amine-cured epoxide resin at temperatures below 350 degrees C

Patterson-Jones, C.; Smith, D. A. (College of Aeronautics, 1967-01)

An epoxy resin made by the reaction of the diglycidyl ether of bis-phenol A and diaminodiphenyl methane was thermally degraded in vacuo at temperatures between 200°C and 350°C. The effect of degradation was examined by ...

The temperature dependence of photo-elastic properties of cross-linked amorphous polyethylenes

Saunders, D. W.; Parsons, D. A.; Lightfoot, D. R. (College of Aeronautics, 1967-08)

Cross-linked samples of polyethylene were prepared by electron irradiation of both high and low density polymers in the crystalline state. A further cross-linked sample was obtained by curing a high density polyethylene by ...

Measurement of thermal cycles in the weld heat affected zone of mild steel

Coward, M. D.; Apps, R. L. (College of Aeronautics, 1967-09)

The thermal cycles in the mild steel parent plate adjacent to a bead on plate weld have been measured for heat inputs of 108, 54 and 42 kJ/inch, by means of embedded thermocouples connected to high response automatic recorders. ...

The effect of plastic anisotropy on flange wrinkling behaviour during sheet metal forming

Naziri, H. (College of Aeronautics, 1967-10)

During the drawing of sheet metal between a die and a blankholder, compressive hoop-stresses are developed which attempt to thicken or wrinkle the flange. Previous work on this behaviour has ignored any effects due ...

The role of ductility in hot working

Tegart, W. J. McG. (College of Aeronautics, 1967-11)

Strength and ductility are the important characteristics which govern the hot working properties of a material. This paper describes test methods for measuring hot workability and then discusses deformation and ...

The design and construction of a weld heat-affected zone simulator

Clifton, T. E.; George, M. J. (College of Aeronautics, 1968-02)

Investigation of the structure and properties of the heat-affected zones in welded joints is usually limited by their small size and their complexity. One method of overcoming this problem is to simulate the structure ...

Some aspects of anisotropic plasticity in sheet metals

Pearce, Roger (College of Aeronautics, 1968-03)

The prediction of the yielding and flow behaviour of materials under complex stress systems from tensile test or other easily determined data has been the aim of engineers for many years. The yield criteria of Tresca and ...

Studies of pure homogeneous deformations in unfilled natural and butyl rubbers

Hall, M. M. (1968-04)

Observed deviations from the kinetic theory of rubberlike elasticity have been reviewed, and particular attention focussed upon the Mooney parameter C2. Stress measurements have been made upon thin rubber sheets in a ...

Welding embrittlement of the parent plate outside the visible heat affected zone region

Coward, M. D. (College of Aeronautics, 1968-04)

Enbrittlement of steels outside the visible heat affected zone region due to plastic straining from the weldment and subsequent ageing has been reported by several authors. The problem is reviewed in this Note and ...

The effect of curing conditions on the extent of cure of Polyester Resin Crystic 189 (Scot-Bader Ltd.)

Smith, D. A. (College of Aeronautics, 1968-06)

The cross-linking, or cure, of Scot Bader Polyester Resin Crystic 139 (L.V.) was investigated by examining the resin during cure by means of acetone Soxhlet extractions and Barcol hardness tests. The experiments were ...

A study of the stress distributions necessary to maintain rubber in a state of torsion

Hall, M. M. (College of Aeronautics, 1968-06)

Quantitative measurements have been made of the time dependent normal stress distributions and torques which are necessary to maintain a state of torsion in: (i) a solid right circular cylinder of rubber, (ii) rubber ...

Browsing CoA. Notes: Materials (1963-1969) by Publication Date

Browsing CoA. Notes: Materials (1963-1969) by Publication Date

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