By M. S. El Naschie, S. Al Athel (auth.), Professor Vlastimil Křupka, Ing. Miloš Drdácký (eds.)
The paintings summarizes theoretical and experimental investigations of genuine loading stipulations of thin-walled plated and shell constructions below a lot targeting components in their floor. There are provided extra actual and superior versions of pressure or tension distribution lower than patch quite a bit contemplating geometrical and fabric nonlinearity in reference to balance difficulties and fatigue harm of studied structural kinds. the result of those investigations are of specific significance within the layout and protection verification of many engineering buildings, e.g. plate girders subjected to partial aspect loading, closures of gasoline tanks, footings and sadles of strain vessels, reservoirs and pipelines.
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Extra resources for Contact Loading and Local Effects in Thin-walled Plated and Shell Structures: IUTAM Symposium Prague/Czechoslovakia September 4–7, 1990
On the other hand it is necessary to underline that the equation (1) will not valid for wider angles 6 since by saddles welded to the vessel with increasing angle 9 > 60'the influence of shearing forces (being neglected with the derivation of eq. (1)) starts to predominate at the place of contact 30 Fig. 3. (see results of experiments in [3J). Our results (form the analytical solution (1)) will be on the safe side because in the case of welded saddles the shearing forces increase the load carrying capacity.
To show this, a decomposition of functions into odd and even functions of the through thickness variable x 2 =r-r m is used through Love previous equations . The local effect has an extension of an order of the thickness , and is extremely sensitive to the derivative of the temperature profile T"(z) which appears in the Beltrami equations. 4. shows the axial stress on the external skin, for two temperatures fields , which are sligthly different in a smaU region just by their second derivatives T"(z).
Approximate solution similar to is possible. To get an imagination, at least, we have made a series of tests as tabulated in Tab. 2. It also compares the measured and ca1cu1ated results with the he1p of an approximate formu1a (2). 14 ] Tab1e 2 e .... ~ QI Ei [mmJ 800 500 300 250 200 100 75 50 65 78 130 165 195 383 495 670 57 66 107 130 155 298 380 490 [ N ] 41,8 66,9 111 ,5 133,8 167,2 334,4 445,9 668,9 Fbuckling [ N J ~ e Fsqueeze I~ [ N] rJ Flim * The own weight of the arm is included in'the results.
Contact Loading and Local Effects in Thin-walled Plated and Shell Structures: IUTAM Symposium Prague/Czechoslovakia September 4–7, 1990 by M. S. El Naschie, S. Al Athel (auth.), Professor Vlastimil Křupka, Ing. Miloš Drdácký (eds.)