A numerical study on the optimization of a granular medium to infer the axial stress in slender structures

被引：14

作者：

Bagheri, Abdollah ^{[1
]}

Rizzo, Piervincenzo ^{[2
]}

Al-Nazer, Leith ^{[3
]}

机构：

[1] Univ Virginia, Dept Civil & Environm Engn, Charlottesville, VA 22903 USA

[2] Univ Pittsburgh, Dept Civil & Environm Engn, Lab Nondestruct Evaluat & Struct Hlth Monitoring, 3700 OHara St, Pittsburgh, PA 15261 USA

[3] Fed Railrd Adm, Off Res & Dev, Washington, DC USA

来源：

MECHANICS OF ADVANCED MATERIALS AND STRUCTURES | 2016年 / 23卷 / 10期

关键词：

Highly nonlinear solitary waves; discrete particle model; nondestructive testing; buckling; thermal stress; NONLINEAR SOLITARY WAVES; IDENTIFICATION; CHAINS;

D O I：

10.1080/15376494.2015.1039679

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The in-situ measurement of axial stress in beams may prevent structural anomalies, such as unexpected buckling. We describe the coupling mechanism between highly nonlinear solitary waves (HNSWs) propagating along a granular system and a beam in contact with the granular medium to assess the ability of HNSWs to measure axial stress. One and two straight chains of particles were considered and the effect of the particles' diameter and material was evaluated to find those designs that maximize the sensitivity to the variation of axial stress. In the future, our findings may be used to develop a novel system for the nondestructive inspection of beams.

引用

页码：1131 / 1143

页数：13

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