Comparison of Theoretical and Experimental Creep-Buckling Times of Initially Straight, Centrally Loaded Columns

1962 ◽  
Vol 29 (4) ◽  
pp. 431-433 ◽  
Author(s):  
W. E. JAHSMAN ◽  
F. A. FIELD
Keyword(s):  
Creep Buckling ◽  
Experimental Creep

The Creep Buckling of Composite Members

1960 ◽  
Vol 2 (4) ◽  
pp. 342-348 ◽  
Author(s):  
J. M. Alexander ◽  
G. A. Webster
Keyword(s):  
Creep Buckling

Buckling of Columns in the Presence of Creep

1956 ◽  
Vol 7 (2) ◽  
pp. 125-134 ◽  
Author(s):  
Sharad A. Patel
Keyword(s):  
Critical Time ◽  
Secondary Creep ◽  
Plastic Deformations ◽  
Creep Buckling ◽  
Elastic And Plastic Deformations

SummaryThis paper is concerned with the solution of the creep buckling of columns. Instantaneous elastic and plastic deformations, as well as the transient and secondary creep, are considered. Formulae for the critical time at which a column fails are presented for integral values of the exponents appearing in the creep law.

Creep Buckling of Tubes in Torsion

1958 ◽  
Vol 25 (1) ◽  
pp. 66-67 ◽  
Author(s):  
lain Finnie
Keyword(s):  
Creep Buckling

Experimental and theoretical investigations of creep buckling on NiCr 22 Co 12 Mo tubes at 950°C

1989 ◽  
Vol 112 ◽  
pp. 291-298 ◽  
Author(s):  
F. Schubert ◽  
K. Ahmed ◽  
G. Breitbach ◽  
H. Nickel
Keyword(s):  
Theoretical Investigations ◽  
Creep Buckling

Tunable Membrane for Electromagnetic Devices Using Dielectric Elastomers

2008 ◽  
Vol 61 ◽  
pp. 141-146
Author(s):  
Christian Bolzmacher ◽  
Karin Bauer ◽  
Ulrich Schmid ◽  
Helmut Seidel ◽  
Moustapha Hafez
Keyword(s):  
Material Model ◽  
Silicone Membrane ◽  
Creep Data ◽  
Electromagnetic Actuators ◽  
Membrane Behavior ◽  
Electromagnetic Devices ◽  
Dynamic Experiments ◽  
Experimental Creep ◽  
Strain Relationship ◽  
Tunable Stiffness

The amplitudes of miniaturized electromagnetic actuators are clearly enhanced if the eigenfrequencies of the membrane are used for actuation. However, the bandwidth for such operation is very limited. This can be overcome to some extent by the employment of membranes with electrically tunable stiffness. In this context we investigated membranes of dielectric elastomer materials and present experimental results on the ability to change their pre-strain to shift the eigenmodes to lower frequencies upon activation. Furthermore, the viscoelastic properties of an acrylic and a silicone membrane are investigated and compared to dynamic experiments. The parameters for the stiffness and viscoelasticity are derived from the experimental creep data and incorporated in a hyperelastic material model. Using this adapted stress-strain relationship the membrane behavior over time can be evaluated for different loading as well as pre-strain conditions.

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