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Volume 28 Issue 6
Dec.  2015
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Journal of Southwest Jiaotong University  > 2015  >  28(6): 971-976.
MA Lei, SHI Xizhi. Recent Development on Consensus-Based Kalman Filtering in Multi-agent Systems[J]. Journal of Southwest Jiaotong University, 2011, 24(2): 287-293. doi: 10.3969/j.issn.0258-2724.2011.02.019
Citation: LI Xiaozhen, XIAO Jun, LIU Dejun, LIU Chenguang, ZHANG Jingfeng, XIAO Lin. Influence of Local Stress Variance on Elastic Stability of Compression Bar[J]. Journal of Southwest Jiaotong University, 2015, 28(6): 971-976. doi: 10.3969/j.issn.0258-2724.2015.06.001
shu

Influence of Local Stress Variance on Elastic Stability of Compression Bar

doi: 10.3969/j.issn.0258-2724.2015.06.001
  • Received Date: 25 Mar 2015
  • Publish Date: 25 Dec 2015
    Abstract
  • To discuss how the elastic stability of compression bar is affected by local stress variances with different loading patterns, the finite element (FE) method was adopted to study the stability performance of compression under the single-point loading and surface loading. A 2-D plane beam was taken as an example and the influence of loading pattern on the local stress variance in the beam element was studied by adjusting the elements near the loading end in the geometric stiffness matrix, and eigenvalue equation was then solved. The results show that different loading patterns notably affect the critical elastic stability loads of compression bar with one end free, but has less effect on the critical loads for the constrained direction of loading end. For the compression bar with one end fixed and one end free and the slenderness ratio from 50 to 280, the critical load under surface loading is 2.14 times higher than that under singe-point loading.

     

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