Electrostrictive Module

This analysis module provides STEP with common models applied to electrostrictive materials. It is one of the four modules included with the Basic STEP Package. The models available for a given set of data depend on the variable plotted on the x-axis. Many models can be fitted in a modified form to account for hysteresis. In most cases this is done by fitting the original form of the model to the average of the top and bottom curves of the data set and fitting a polynomial to the difference between the top and bottom curve.

Linked models require dual data sets where the non-linked model is fitted first, and the linked model is fitted to the data using x data points provided by the non-linked model.

Electric Field (E) as X-axis

Y-axis

Model

Hysteresis

D

Zhang and Rogers

Even polynomial

D

Piquette and Forsythe

Even polynomial

S

Even polynomial

Odd polynomial

S

Linked Mason's

Depends on linked model giving D

Electric Displacement (D) as X-axis

Y-axis

Model

Hysteresis

E

Mason's electrostriction

Even polynomial

E

Hom's et al

Even polynomial

S

Mason's

Odd polynomial

Stress (T) as X-axis

Y-axis

Model

Hysteresis

E

Mason's electrostriction

Even polynomial

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