(1) Theory of Elasticity (2) Department of Scientific and Industrial Research Second Report of the Steel Structures Research Committee

Nature ◽  
1935 ◽  
Vol 135 (3426) ◽  
pp. 1056-1058
Author(s):  
Ivan Nazarenko ◽  
◽  
Mykola Kuzminets ◽  
Oleg Dedov ◽  
Igor Zalіsko ◽  
...  

The article considers a system that combines the influence of static on dynamic loads on the example of the support-rotary circuit of a truck construction crane. The position of the system and its elements with the highest loads is revealed, the method of creating steel structures is investigated, each element, depending on the average load, experiences a stress-strain state. The basic laws of the theory of elasticity and plasticity were used to build a calculated mathematical model of the loaded support-rotary circuit. Equations of motion were compiled taking into account the behavior of structural elements and the machine as a whole under the simultaneous action of different loads. The calculation scheme was taken in the form of a structure consisting of rods rigidly connected to each other in nodes. As a method of calculation the method of finite elements with definition of displacements (deformations), efforts (stresses) in nodes of a grid of constructive elements of a design of a basic-rotary contour is applied. The stress distribution in each structural element depending on the type of load was obtained. This distribution allowed to choose rational parameters of a design in each its section. The proposed approach allowed to create a solid structure that provides reliability and economy of material. Thus, the results obtained allowed to fully analyze and decide on the simultaneous provision of strength, rigidity and minimum material consumption of the structure.


1999 ◽  
Vol 32 (4) ◽  
pp. 461-481 ◽  
Author(s):  
ANDREW HULL

In late 1916 the British Government finally bowed to pressure from scientists and sympathetic elements of the public to organize and fund science centrally and established the Department of Scientific and Industrial Research (DSIR). Since just before the turn of the century state funding for science had steadily increased: the National Physical Laboratory was established in 1899, the Development Commission in 1909 and the Medical Research Committee in 1913. The establishment of the DSIR marked an end to piecemeal support and it was therefore a watershed when the statefinally accepted its responsibility to fund science properly, to develop a coherent science policy and thus recognise that science and scientists were crucial components of modern national life; not just in wartime, but in the development of the peacetime economy as well.At least this is how the history of the DSIR is currently still represented. The following analysis is more sensitive than previous treatments as it points out that the state's organization of a centrally planned and funded national policy for science began before the DSIR, and that this new body (in its support of pure research) reflected priorities established before the outbreak of the war. In previous accounts the DSIR was presented as a total break with the laissez-faire past. So, as historians we no longer follow the special pleading of the contemporary science lobby in arguing that the state was deaf to the needs of modern science. However, I want to argue that we are still deaf to the wider concerns of this contemporary pro-science rhetoric, which argued not only for centrally planned and funded science, but also often that scientists themselves should make policy for science.


1924 ◽  
Vol 43 ◽  
pp. 160-169
Author(s):  
Henry Briggs ◽  
John Mallinson

This communication describes a series of experiments carried out at the Heriot-Watt College, Edinburgh, on behalf of the Oxygen Research Committee, Scientific and Industrial Research Department. The experiments may be regarded as continuing a line of inquiry introduced by a paper read before the Society in 1921; their aim was to obtain data in regard to the rate of decay of the vacua (i.e. the rate of increase of the pressure in the vacuum envelope) of metallic Dewar vessels.


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