Journal ArticleDOI
Monotonic uniaxial and biaxial electromechanical experiments and modeling of uniaxial stretched polyvinylidene fluoride (PVDF)
Harish Lambadi,C. Lakshmana Rao +1 more
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In this article, results from monotonic uniaxial and baoxial stretch experiments carried out on rectangular uniaxonially stretched PVDF thin samples, are reported.Abstract:
In this study, results from monotonic uniaxial and biaxial stretch experiments carried out on rectangular uniaxially stretched PVDF thin samples, is reported. Both mechanical and electromechanical response of the film is reported in the study. Non-linearity in mechanical and electromechanical response is observed. Anisotropy in mechanical and electromechanical response is also noted from uniaxial and biaxial experiments. Constitutive models that are developed to capture (a) nonlinearity and (b) anisotropy are reported both for a mechanical and electromechanical response.read more
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Journal ArticleDOI
Cyclic Electro-Mechanical Modelling of Uniaxially Stretched PVDF
TL;DR: In this article, the authors used two approaches to model cyclic stress with the number of cycles and the effect of cyclic loading on the material, in terms of entropy generation for mechanical and electrical response, is considered for modelling and this approach is adopted to model the PVDF response when subjected to cyclic load.
References
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Levenberg--Marquardt algorithm: implementation and theory
TL;DR: A robust and efficient implementation of a version of the Levenberg--Marquardt algorithm is discussed and it is shown that it has strong convergence properties.
Journal ArticleDOI
Electro-mechanical properties of the piezoelectric polymer PVDF
TL;DR: In this article, a consistent experimental program has been developed to investigate the mechanical and electrical properties of polyvinylidene fluoride (PVDF), and the results of the study indicate that this piezoelectric polymer can be characterized as an orthotropic, thermorheologically simple material with constant PDE strain coefficients over the experimental range of stresses, frequencies and temperatures.
ReportDOI
Characterization, Performance and Optimization of PVDF as a Piezoelectric Film for Advanced Space Mirror Concepts
Gary D. Jones,Roger A. Assink,Tim R. Dargaville,Pavel M. Chaplya,Roger L. Clough,Julie M. Elliott,Jeffrey W. Martin,Daniel Michael Mowery,Mathew Celina +8 more
TL;DR: In this article, the degradation and performance of polyvinylidene fluoride (PVDF) copolymers under various stress environments expected in low Earth orbit has been reviewed and investigated.