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Delamination Growth of Piezoelectric Cylindrical Shell with Delamination under Hygrothermal Conditions
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Abstract
The delamination growth may occur in delaminated
piezoelectric shell subjected to external dynamic
load and it will further cause structural failure. Based on
the variational principle of moving boundary and considering
the contact effect between delamination regions,
in this paper, the nonlinear governing equations for the
delaminated piezoelectric shell under hygrothermal condition
are derived, and the corresponding boundary and
matching conditions are given. At the same time, according
to the Griffith criterion, the formulas of energy release
rate along the delamination front are obtained and the
delamination growth is studied. In the numerical calculation,
the energy release rate and delamination growth
of axisymmetrical piezoelectric cylindrical shell are analyzed,
and the effects of geometric nonlinear, voltage,
temperature and humidity, mechanical load, delamination
length and depth, geometrical parameter and boundary
condition on delamination growth are discussed.
Title: Delamination Growth of Piezoelectric Cylindrical
Shell with Delamination under Hygrothermal
Conditions
Description:
Abstract
The delamination growth may occur in delaminated
piezoelectric shell subjected to external dynamic
load and it will further cause structural failure.
Based on
the variational principle of moving boundary and considering
the contact effect between delamination regions,
in this paper, the nonlinear governing equations for the
delaminated piezoelectric shell under hygrothermal condition
are derived, and the corresponding boundary and
matching conditions are given.
At the same time, according
to the Griffith criterion, the formulas of energy release
rate along the delamination front are obtained and the
delamination growth is studied.
In the numerical calculation,
the energy release rate and delamination growth
of axisymmetrical piezoelectric cylindrical shell are analyzed,
and the effects of geometric nonlinear, voltage,
temperature and humidity, mechanical load, delamination
length and depth, geometrical parameter and boundary
condition on delamination growth are discussed.
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