TY - CHAP
T1 - Granular chains for the assessment of thermal stress in slender structures
AU - La Malfa Ribolla, Emma
AU - Bagheri, Abdollah
AU - Rizzo, Piervincenzo
PY - 2015
Y1 - 2015
N2 - Slender beams subjected to compressive stress are common in civil and mechanical engineering. The rapid in-situ measurement of this stress may prevent structural anomalies. In this paper, 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 granular medium. We evaluate the use of HNSWs as a tool to measure stress in thermally loaded structures and to estimate the neutral temperature, i.e. the temperature at which this stress is null. We investigated numerically and experimentally one and two L-shaped chains of spherical particles in contact with a prismatic beam subjected to heat. We found that certain features of the solitary waves are affected by the beam's stress. In the future, these findings may help developing a novel sensing system for the nondestructive prediction of neutral temperature and thermal buckling.
AB - Slender beams subjected to compressive stress are common in civil and mechanical engineering. The rapid in-situ measurement of this stress may prevent structural anomalies. In this paper, 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 granular medium. We evaluate the use of HNSWs as a tool to measure stress in thermally loaded structures and to estimate the neutral temperature, i.e. the temperature at which this stress is null. We investigated numerically and experimentally one and two L-shaped chains of spherical particles in contact with a prismatic beam subjected to heat. We found that certain features of the solitary waves are affected by the beam's stress. In the future, these findings may help developing a novel sensing system for the nondestructive prediction of neutral temperature and thermal buckling.
UR - http://hdl.handle.net/10447/241722
UR - http://spie.org/app/search/browse?Dy=1&Nty=1&Nrpp=20&Ntt=Granular+chains+for+the+assessment+of+thermal+stress+in+slender+structures
M3 - Chapter
SN - 9781628415384
T3 - PROCEEDINGS OF SPIE
BT - Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2015
ER -