TECHICAL Series MATHEMATICS • INFORMATICS • PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
Some Aspects Regarding the Elasto-Plastic Range of Beams on Elastic Foundation
(Universitatea Petrol-Gaze din Ploieşti, Bd. Bucureşti 39, Ploieşti e-mail: vserban @mail.upg-ploiesti.ro)
Vol LX • No. 1/2008
Şerban Vasilescu
Universitatea Petrol-Gaze din Ploieşti, Bd. Bucureşti 39, Ploieşti
e-mail: vserban @mail.upg-ploiesti.ro

 Keywords   beam on elastic foundation, hinge, shell

 Abstract
In the paper is presented a method for calculation the length of the elasto-plastic range of rectangular beams based on elastic foundation and loaded with uniform external pressure.
The expressions of the cross sectional efforts have been established and the origin parameters have been used. In order to calculate the exact length of the elasto-plastic range, a specialised programme has been developed. The results obtained are analysed in two calculus examples.


 Rezumat
În lucrare se prezintă o metodologie de determinare a lungimii zonelor elasto-plastice la barele drepte cu secţiune dreptunghiularǎ, aşezate pe o fundaţie elasticǎ şi solicitate de o sarcinǎ uniform distribuitǎ pe toatǎ lungimea. Sunt utilizate expresiile eforturilor secţionale exprimate în funcţie de parametrii în origine şi este realizat un program de calcul care permite calculul exact pe care bara se aflǎ în domeniul elasto-plastic. Lungimea acestui interval este importantǎ în calculul deplasǎrilor, care se determinǎ diferit în funcţie de stadiul elastic sau elasto-plastic.
Rezultatele obţinute sunt analizate pe exemple concrete, cu diverse rezemǎri la capete.
Se sugereazǎ, de asemenea, cǎ rezultatele obţinute pot fi aplicate şi pentru cilindrii subţiri presurizaţi interior.


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