Efficient computation for lower bound dynamic buckling loads of imperfect systems under impact loading

AbstractBy means of ping-pong balls, the dynamic buckling behaviours of thin-walled spherical shells under impact loading are studied both experimentally and numerically. First, the quasi-static tests were conducted on an MTS tester, in which the ball was compressed onto a PMMA plate. Apart from the force-displacement relationship, the evolution of the contact zone between the ball and the plate was obtained by a digital camera. In the impact tests, ping-pong balls were accelerated by an air-gun and then impinged onto a rigid plate with the velocity ranging 10–45 m

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COMPUTATIONAL STRATEGIES FOR LOWER BOUND BUCKLING LOADS OF WIND-LOADED SHELLS OF REVOLUTION

10.5151/meceng-wccm2012-19643 ◽

2014 ◽

Author(s):

R. C. Jaca ◽

L. A. Godoy

Keyword(s):

Lower Bound ◽

Shells Of Revolution ◽

Buckling Loads

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Effects of Solid Viscosities, Loading Velocities and Initial Deflections to Dynamic Buckling Loads of a Column

The Aeronautical Journal ◽

10.1017/s0001924000086127 ◽

1969 ◽

Vol 73 (706) ◽

pp. 890-894

Author(s):

Shin-Ichi Suzuki

Keyword(s):

Dynamic Load ◽

Analytical Methods ◽

Dynamic Buckling ◽

Static Loads ◽

Buckling Loads ◽

Load Factors

It is a well-known fact that buckling values for columns under dynamical loads are different from those under static loads. Meier, Gerard and Davidson have already investigated the dynamics of the buckling of elastic columns theoretically and experimentally, and Hoff discussed analytical methods in detail. However, solid viscosities are neglected in all these researches. Previously, the author obtained the relationships between dynamic load factors and solid viscosities, and it was found that their effects on dynamic load factors cannot be neglected. It will be interesting to investigate the relationships between solid viscosities and dynamic buckling values.

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WITHDRAWN: Computation of lower-bound buckling loads for tanks under wind pressure

Thin-Walled Structures ◽

10.1016/j.tws.2010.01.013 ◽

2010 ◽

Author(s):

Saeed Sahmani ◽

Abolfazl Darvizeh

Keyword(s):

Lower Bound ◽

Wind Pressure ◽

Buckling Loads

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On Buckling Loads of Timoshenko Columns with Elastically Supported Ends

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.446-449.578 ◽

2012 ◽

Vol 446-449 ◽

pp. 578-581

Author(s):

Hua Zhang ◽

Xiang Fang Li

Keyword(s):

Lower Bound ◽

Closed Form ◽

Upper Bound ◽

Intermediate State ◽

Critical Loads ◽

Compressive Force ◽

Buckling Loads ◽

Characteristic Equations ◽

The Stability ◽

Elastically Supported

The stability of Timoshenko columns with elastically supported ends under axially compressive force is analyzed. Characteristic equations are obtained according to an intermediate state between Haringx’s and Engesser’s models. For clamped-free, clamped-clamped, and pinned-pinned columns, buckling loads are given in closed form. The influences of elastic restraint stiffness on the critical loads are elucidated. Haringx’s and Engesser’s models are two extreme cases of the present. Critical buckling loads using Haringx’s model are upper bound, and those using Engesser’s model are lower bound.

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