6533b86efe1ef96bd12cbde0
RESEARCH PRODUCT
On the coupling dynamics between thermally stressed beams and granular chains
Piervincenzo RizzoEmma La Malfa RibollaLeith Al-nazerAbdollah Bagherisubject
Materials science02 engineering and technologyWelding01 natural sciencesVibrationlaw.inventionStress (mechanics)lawNondestructive testing0103 physical sciencesCoupling (piping)Composite materialNondestructive testing010306 general physicsHighly nonlinear solitary waveGranular chainbusiness.industryMechanical EngineeringNeutral temperature021001 nanoscience & nanotechnologyNull (physics)VibrationNonlinear systemDiscrete particle modelPhysics::Accelerator Physics0210 nano-technologybusinessBeam (structure)Thermal stredescription
The in-situ measurement of thermal stress in slender beams, or long continuous welded rails, may prevent structural anomalies. With this aim, we investigated the coupling dynamics between a beam and the highly nonlinear solitary waves propagating along a straight granular chain in contact with the beam. We hypothesized that these waves can be used to measure the stress of thermally loaded structures, or to infer the neutral temperature, i.e., the temperature at which this stress is null. We studied numerically and experimentally the mechanical interaction of one and two straight chains of spherical particles in contact with a prismatic beam that is subjected to heat. The results show that certain features of the waves are affected by the beamâs stress. In the future, these findings may be used to develop a novel nondestructive evaluation technique for the prediction of neutral temperature and thermal buckling.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-07-30 |