Measuring the direct piezoelectric charge coefficient for polymer matrix composites

作者：Babu Indu; Meis Niels; de With Gij**ertus^*

来源：Polymer Testing, 2014, 40: 286-289.

DOI：10.1016/j.polymertesting.2014.10.001

• Piezoelectric properties
• Piezoelectric composites
• Smart materials
• PZT
• 0-3 connectivity

To realize proper measurements of the piezoelectric charge constant d(33) of materials a certain mechanical load is required. Usually, this implies using a dynamic load (to evaluate the material%26apos;s response) superimposed on a static preload (to achieve good mechanical contact). As the value of d(33) depends on the applied stress, this preload can lead to load dependence of the experimentally determined value of d(33). For stiff materials, the effect should be negligible but for compliant materials, such as composites using a low modulus matrix, a considerable contribution can arise, and thus the experimental data should be corrected accordingly. In order to characterise d(33) accurately, the load dependence of d(33) for several compliant polymer matrix composites was determined. The results show that for these composites correction to zero load is a prerequisite for accurate d(33) evaluation.

• 出版日期2014-12