TY - JOUR
T1 - Reducing the effect of wave dispersion in a timber pole based on transversely isotropic material modelling
AU - Subhani, Mahbube
AU - Li, Jianchun
AU - Samali, Bijan
AU - Crews, Keith
PY - 2016
Y1 - 2016
N2 - Round timbers are used for telecommunication and power distribution networks, jetties, piles, short span bridges etc. To assess the condition of these cylindrical shape timber structures, bulk and elementary wave theory are usually used. Even though guided wave can represents the actual wave behaviour, a great deal complexity exists to model stress wave propagation within an orthotropic media, such as timber. In this paper, timber is modelled as transversely isotropic material without compromising the accuracy to a great extent. Dispersion curves and mode shapes are used to propose an experimental set up in terms of the input frequency and bandwidth of the signal, the orientation of the sensor and the distance between the sensors in order to reduce the effect of the dispersion in the output signal. Some example based on the simulated signal is also discussed to evaluate the proposed experimental set up.
AB - Round timbers are used for telecommunication and power distribution networks, jetties, piles, short span bridges etc. To assess the condition of these cylindrical shape timber structures, bulk and elementary wave theory are usually used. Even though guided wave can represents the actual wave behaviour, a great deal complexity exists to model stress wave propagation within an orthotropic media, such as timber. In this paper, timber is modelled as transversely isotropic material without compromising the accuracy to a great extent. Dispersion curves and mode shapes are used to propose an experimental set up in terms of the input frequency and bandwidth of the signal, the orientation of the sensor and the distance between the sensors in order to reduce the effect of the dispersion in the output signal. Some example based on the simulated signal is also discussed to evaluate the proposed experimental set up.
KW - dispersion
KW - nondestructive testing
KW - stress waves
KW - timber
UR - http://handle.uws.edu.au:8081/1959.7/uws:33774
U2 - 10.1016/j.conbuildmat.2015.10.010
DO - 10.1016/j.conbuildmat.2015.10.010
M3 - Article
SN - 0950-0618
VL - 102
SP - 985
EP - 998
JO - Construction and Building Materials
JF - Construction and Building Materials
IS - 2
ER -