On the Use of L-shaped Granular Chains for the Assessment of Thermal Stress in Slender Structures

Emma La Malfa Ribolla, Giuseppe Giambanco, Bagheri, Al-Nazer, Piervincenzo Rizzo

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Slender beams subjected to compressive load are common in civil engineering. The rapid in-situ measurement of this stress may help preventing structural anomalies. In this article, we describe the coupling mechanism between highly nonlinear solitary waves (HNSWs) propagating along an L- shaped granular system and a beam in contact with the gran- ular medium. We evaluate the use of these waves to measure stress in thermally loaded structures and to estimate the neutral temperature, i.e. the temperature at which the stress is null. We investigate numerically and experimentally one and two L- shaped chains of spherical particles in contact with a prismatic beam subjected to heat. We find that certain features of the solitary waves are affected by the beam’s stress. In the future these findings may be used to develop a novel sensing system or the nondestructive prediction of neutral temperature and thermal buckling.
Original languageEnglish
Pages (from-to)543-558
Number of pages16
JournalExperimental Mechanics
Volume55
Publication statusPublished - 2015

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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