ISSN:
1573-9325
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract An original variation of the finite element method has been developed. Its main features are that a large step-by-step increment of elastoplastic deformation (up to 10%) is acceptable, the method of calculation of the matrix of rigidity of an element reduces nonhardening and softening materials to ordinary particular cases, and the calculations use a real unsimplified strain diagram of the material. With use of the variation of the finite element method developed the distribution of intensity of plastic deformation accumulated during one thermal cycle in the 200–900°C range was calculated for model specimens of tubular joints machined from 12Kh18N10T steel-titanium alloy and 12Kh18N10T steel-niobium bimetals. It is shown that the calculation results agree well with experimental results and the difference in fracture of the niobium and titanium alloy specimens may be explained by the difference in distribution of strain in the copper layer, which in dimensions, form, and location is the same in the niobium and titanium alloy specimens. Calculation of a single specimen on an ES-1040 computer required comparatively small computer resources, 22 min of central processor time and 250 K of operational memory. Net-works consisting of 156 linear triangular finite elements and having 190 degrees of freedom were used for simulation of the specimens.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00770817
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