Interaction curves for stiffened panel with circular opening under axial and lateral loads

All tokamaks are designed to withstand a certain number of energetic electromagnetic (EM) transients caused by uncontrolled terminations of plasma pulses, including symmetric and asymmetric plasma vertical displacement events: VDEs and AVDEs. These events generate significant pulsed EM loads in all conductive components and coils. Axially symmetric transient EM loads induced by VDEs without Halo current have been calculated well since the 1980s; however, Halo-related EM load components and lateral loads associated with AVDEs still cause discussions. The author worked on fast plasma and EM transients in tokamaks quite a while ago then deviated to other areas but has been keeping track of the topic since. He is aware of discussions of the modelling of Halo currents and of significant scatter present in current estimates for AVDE-induced lateral loads and contends that some points of engineering logic formulated earlier on this topic may help reduce these uncertainties. This article summarises a few points of the engineering understanding developed in informal discussions within the ITER EDA team with the purpose to preserve these points for all tokamak developments.

Download Full-text

Effects of wood species, connection system, and wall-support interface type on cyclic behaviors of cross-laminated timber (CLT) walls under lateral loads

Construction and Building Materials ◽

10.1016/j.conbuildmat.2021.122450 ◽

2021 ◽

Vol 280 ◽

pp. 122450 ◽

Cited By ~ 1

Author(s):

Dang Khai Tran ◽

Gi Young Jeong

Keyword(s):

Wood Species ◽

Lateral Loads ◽

Cross Laminated Timber ◽

Connection System ◽

Interface Type

Download Full-text

Low Buckling Loads of Axially Compressed Conical Shells

Journal of Applied Mechanics ◽

10.1115/1.3408517 ◽

1970 ◽

Vol 37 (2) ◽

pp. 384-392 ◽

Cited By ~ 68

Author(s):

M. Baruch ◽

O. Harari ◽

J. Singer

Keyword(s):

Boundary Conditions ◽

Axial Compression ◽

Plane Boundary ◽

Essential Difference ◽

Physical Reason ◽

Buckling Loads ◽

Conical Shells ◽

Simple Supports ◽

Interaction Curves ◽

The Stability

The stability of simply supported conical shells under axial compression is investigated for 4 different sets of in-plane boundary conditions with a linear Donnell-type theory. The first two stability equations are solved by the assumed displacement, while the third is solved by a Galerkin procedure. The boundary conditions are satisfied with 4 unknown coefficients in the expression for u and v. Both circumferential and axial restraints are found to be of primary importance. Buckling loads about half the “classical” ones are obtained for all but the stiffest simple supports SS4 (v = u = 0). Except for short shells, the effects do not depend on the length of the shell. The physical reason for the low buckling loads in the SS3 case is explained and the essential difference between cylinder and cone in this case is discussed. Buckling under combined axial compression and external or internal pressure is studied and interaction curves have been calculated for the 4 sets of in-plane boundary conditions.

Download Full-text