Piezoresistivity in Mechanical APDLimechanica.org/files/Piezoresistivity in Mechanical APDL.pdf=...
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Transcript of Piezoresistivity in Mechanical APDLimechanica.org/files/Piezoresistivity in Mechanical APDL.pdf=...
Piezoresistivity in Mechanical APDL
In piezoresistive materials, stress or strain cause a change of electric resistivity:
(1)
where:
= electric resistivity of a loaded material =
ZZ
YZYY
XZXYXX
symm
= electric resistivity of an unloaded material
=
=identity matrix =
=relative change in resistivity =
rrrrrr
Z
YZY
XZXYX
sym
calculated as
(2)
where
=vector matrix components = T;
= piezoresistive strain matrix, as supplied in Mechanical ANSYS PDL;
X Y Z XY YZ XZ X Y Z XY YZ XZ
{εel} = the elastic strain vector.
