scholarly journals 1. On an Instrument for measuring the extensibility of Elastic Solids.

1851 ◽  
Vol 2 ◽  
pp. 173-175
Author(s):  
Forbes
Keyword(s):  
Modulus Of Elasticity ◽  
Elastic Solids ◽  
Middle Point ◽  
The Wire

This instrument is almost a faithful reproduction of S'Gravesande's apparatus described in his “Physices Elementa Mathematica,” 1742 (but not in the previous editions). It is described or alluded to by few modern writers, except Biot in his “Traité de Physique.” It consists of a strong wooden table or frame, with a vice at each end, between which a wire or lamina may be stretched with a determinate tension by means of a weight attached by a cord, passing over a pulley in the manner of the musical apparatus, called a Monochord. After the tension is adjusted, both vices are screwed fast, the space included between them being exactly 50 inches. If now, any deviation of the middle point of the wire included by the vices be made (similar to the action of sounding a harp-string), the force required to pull it a certain distance aside will depend, 1st, on the length of the wire; 2d, on its tension; 3d, on its extensibility, or the modulus of elasticity.

scholarly journals STUDI VARIASI JENIS MATERIAL TALI PADA MODIFIKASI ALAT PENGUKURAN TORSI POMPA SENTRIFUGAL

Otopro ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. 50
Author(s):  
Taufik Afandi ◽  
Edi Widodo ◽  
Prantasi Harmi Tjahjanti ◽  
Iswanto Iswanto
Keyword(s):  
Elastic Modulus ◽  
Tensile Test ◽  
Centrifugal Pump ◽  
Modulus Of Elasticity ◽  
Stress Calculation ◽  
A Value ◽  
Polypropylene Monofilament ◽  
The Wire

The focus of this research is to analyze variations in the type of rope material and size as a link for measuring the force on a centrifugal pump, namely to find out the type of material and the size of the rope that is suitable to minimize the loss of force contained in the wire. To find out the type of calculation and comparison of the values for various types of material. From the tensile test that has been done, the highest UTS (Ultimate Tensille Stress) value was obtained in a polypropylene monofilament rope specimen with a stress value of 602.17 kgf with 382.14% elongation. The highest stress calculation value data was obtained by the Polypropylene monofilament rope specimen with a value of 738,85 at elongation to 360%. The highest modulus of elasticity obtained by Nylon rope was 4,564  . This shows that the modulus of elasticity is inversely proportional to the stress value, which was the stress value of nylon straps that was the highest compared to other specimens but had the highest elastic modulus value among other specimens.

XXVII. Account of experiments made at Holyhead (North Wales) to ascertain the transit-velocity of waves, analogous to earthquake waves, through the local rock formations

1861 ◽  
Vol 151 ◽  
pp. 655-679 ◽  
Keyword(s):  
Modulus Of Elasticity ◽  
East Coast ◽  
British Association ◽  
Elastic Solids ◽  
The Earth ◽  
Rock Formations ◽  
North Wales ◽  
The Media

In my “Second Report on the Facts of Earthquake Phenomena” in the Report of the British Association for 1851, the transit-velocities were experimentally determined of waves of impulse produced by the explosion of charges of gunpowder, and these velocities shown to be In wet sand . . . . . . 824.915 feet per second, In discontinuous granite . . 1306.425 feet per second, In more solid granite . . . 1664.574 feet per second, the range of sand employed having been that of Killiney Strand, and of granite that of Dalkey Island, both on the east coast of Ireland. These results produced some surprise on my own part as well as on that of others, —the transit-velocities obtained falling greatly below those which theory might have suggested as possible, based upon the modulus of elasticity of the material constituting the range in either case. I suggested as the explanation of the low velocities ascertained, that the media of the ranges (like all the solids constituting the crust of the earth) were not in fact united and homogeneous elastic solids, but an aggregation of solids more or less shattered, heterogeneous, and discontinuous, and that to the loss of vis viva , and of time, in the propagation of the wave from surface to surface, was due the extremely low velocities observed.

Microstructural Development in Nb-Ti Multifilamentary Superconductors During Processing

1985 ◽  
Vol 43 ◽  
pp. 190-191
Author(s):  
A. W. West
Keyword(s):  
Heat Treatment ◽  
Critical Current Density ◽  
Copper Matrix ◽  
Wire Drawing ◽  
Heat Treatments ◽  
Microstructural Development ◽  
Final Size ◽  
Density Values ◽  
The Wire ◽  
Multifilamentary Superconductors

The influence of the filament microstructure on the critical current density values, Jc, of Nb-Ti multifilamentary superconducting composites has been well documented. However the development of these microstructures during composite processing is still under investigation.During manufacture, the multifilamentary composite is given several heat treatments interspersed in the wire-drawing schedule. Typically, these heat treatments are for 5 to 80 hours at temperatures between 523 and 573K. A short heat treatment of approximately 3 hours at 573K is usually given to the wire at final size. Originally this heat treatment was given to soften the copper matrix, but recent work has shown that it can markedly change both the Jc value and microstructure of the composite.

Use of the AO Wire Passer to Aid Placement of Obstetrical Saw Wire for Osteotomy

1994 ◽  
Vol 07 (04) ◽  
pp. 180-182
Author(s):  
N. Gofton ◽  
Joanne Cockshutt
Keyword(s):  
Soft Tissue ◽  
Close Contact ◽  
Soft Tissue Trauma ◽  
Wire Saw ◽  
Tissue Dissection ◽  
The Wire ◽  
Tissue Trauma

The AO wire passer can be used as an effective guide for passage of obstetrical saw wire for osteotomy. Use of the wire saw and passer reduces soft tissue trauma by minimizing tissue dissection, and promoting positioning of the saw in close contact with the bone.

Working up to the wire…

2019 ◽  
Vol 13 (2) ◽  
pp. 198-206
Author(s):  
Philippa Smethurst
Keyword(s):  
Psychotherapeutic Processes ◽  
Internal Structures ◽  
The Wire ◽  
Power And Energy ◽  
Time Boundary ◽  
The Way

This is a reflection on the power of endings and time boundaries, exploring the way that time can act as a catalyst in psychotherapeutic processes. The article describes the ending processes with five clients. These occurred simultaneously due to the author’s relocation. Some responses illuminate hitherto hidden and intractable internal structures, and in others the intensity of the limit acts an impetus for the client to grasp something new. Drawing on Power’s comprehensive book: Forced Endings in Psychotherapy and Psychoanalysis (2016), the author reflects on the power and energy springing from the setting of the time boundary and the different dynamics created in client and therapist. There is acknowledgement of the pressure that this can create in the therapist and also there are reflections about what ultimately may be achieved.

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