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The study on how the dynamic buckling of thin steel plates with V-grooves starts
Date Issued
2009
Date
2009
Author(s)
Chen, Sung-Nan
Abstract
This article focuses on the deformation of thin plates with V-grooves in high speed dynamic compression test. The depth of the V-grooves was set at two depths: 4 and 10mm, and the ram speed during the test was set at 9m/s. The simulationa was conducted by using the dynamic-explicit FEM code LS-DYNA. From the experimental results, it was found that the deformation occurred at grooves 10mm depth when buckling started. Since the buckling was accelerated by the deformations around the V-groove regions, such phenomenon was considered as the local deformation inducing buckling. However, there was no local deformation at grooves 4mm deep as buckling started; the critical load at this condition was the same as in the condition with V-grooves 10mm deep. Since the buckling was induced by the deformation of the entire plate, it was called as global buckling. The above phenomenon was also found in simulation. The deformation occurred on grooves 10mm deep while the grooves 4mm deep remained the same. However, the deformation in simulation was regular and symmetric. This was due to the assumption on the material that was homogeneous and isotropic. The plates used in the experiments were not made of homogeneous materials, thus the deformation in experiment was not completely the same as those from simulation.
Subjects
Dynamic buckling
Critical load
Local buckling
Global buckling
homogeneous
Type
thesis
File(s)
No Thumbnail Available
Name
ntu-98-R95522521-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):346e2493af839ee86b8304c76efe829d