Electro-Mechanical Properties of Electron Irradiated P(VDF-TrFE) Copolymers Under Different Mechanical Stresses

1999 ◽  
Vol 600 ◽  
Author(s):  
Z.-Y. Cheng ◽  
S. J. Gross ◽  
V. Bharti ◽  
T.-B. Xu ◽  
T. Mai ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electric Field ◽  
High Energy ◽  
Uniaxial Tensile ◽  
Transverse Strain ◽  
Strain Response ◽  
Copolymer Films ◽  
Uniaxial Tensile Stress ◽  
Transverse Strains ◽  
Electric Field Induced Strain

AbstractThe electro-mechanical properties of high energy electron irradiated poly(vineylidene fluoride-trifluorethylene) (P(VF-TrFE)) copolymers under different mechanical stress conditions are reported. In stress free condition, the electric field induced longitudinal and transverse strains of the irradiated P(VDF-TrFE) copolymer films at room temperature (RT) can reach about 5% and more than 3% respectively. The longitudinal strain response of the material under hydrostatic a pressure up to 83 atmospheses was studied at RT. The transverse strain response of the material at RT was studied under uniaxial tensile stress. It was found that the material has a high load capability and for stretched films along the stretching direction the induced strain remains high, even at about 45 MPa. The temperature dependence of the strain response is also characterized. Both the temperature and stress dependence of the strain response indicate that the electric field induced strain response originates from the electric field induced local phase transition.

Bi(Mg1/2Zr1/2)O3-PbZrO3-PbTiO3 relaxor ferroelectric ceramics with large and temperature-insensitive electric field induced strain response

2021 ◽  
Author(s):  
Hongrui Jia ◽  
Zhigang Liang ◽  
Zhen Li ◽  
Fei Li ◽  
Linghang Wang
Keyword(s):  
Electric Field ◽  
Ceramic Materials ◽  
Ferroelectric Ceramic ◽  
Relaxor Ferroelectric ◽  
Ferroelectric Ceramics ◽  
Harsh Environment ◽  
Strain Response ◽  
Practical Application ◽  
Electric Field Induced Strain ◽  
Relaxor Ferroelectric Ceramics

Ferroelectric ceramic materials with large and temperature-insensitive strain response are highly desired for the practical application of actuator in harsh environment conditions. In this work, a novel xBi(Mg1/2Zr1/2)O3-(0.55-x)PbZrO3-0.45PbTiO3 (xBMZ-PZ-0.45PT) ternary...

scholarly journals Site occupancy and electric-field induced strain response of Er-doped (Bi0.4Na0.4Sr0.2)TiO3 ceramics

2019 ◽  
Vol 779 ◽  
pp. 7-14 ◽  
Author(s):  
Kerry McLaughlin ◽  
Cristina Pascual-Gonzalez ◽  
Dawei Wang ◽  
Antonio Feteira
Keyword(s):  
Electric Field ◽  
Site Occupancy ◽  
Strain Response ◽  
Er Doped ◽  
Electric Field Induced Strain

scholarly journals Uniaxial Tensile Stress-Strain Response on the 3D Angle Interlock Woven Fabric Composite

2019 ◽  
Vol 7 (4.14) ◽  
pp. 430
Author(s):  
F. M.Z. Nasrun ◽  
M. F. Yahya ◽  
M. R. Ahmad ◽  
S. A. Ghani
Keyword(s):  
Tensile Stress ◽  
The Other ◽  
Woven Fabric ◽  
Uniaxial Tensile ◽  
Strain Response ◽  
Woven Composite ◽  
Stress Strain ◽  
Fabric Composite ◽  
Uniaxial Tensile Stress ◽  
Set Up

An experimental study have been performed to investigate the uniaxial tensile stress-strain response on the 3D angle interlock (3DAI) woven fabric composite. The tensile analysis were examined based on different woven fabric set-up parameter of draw-in plan ; pointed (DRW 1), broken (DRW 2), broken mirror (DRW 3), and straight (DRW 4). Meanwhile, the woven fabric composite were produced based on 22 and 25 pick.cm-1 of weft densities. The outcomes produced shown that woven composite sample with 25 pick.cm-1 on DRW 4 projected the highest stress response, 113 MPa. Extensive review indicated that DRW 1 and 4 gave better tensile stress-strain response than the other counterpart. 

Temperature Dependence of Electric Field Induced Strain in PLZT 9/65/35 Ceramics

2016 ◽  
Vol 675-676 ◽  
pp. 643-646 ◽  
Author(s):  
Siripong Somwan ◽  
Narit Funsueb ◽  
Apichart Limpichaipanit ◽  
Athipong Ngamjarurojana
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Electric Field ◽  
Temperature Dependence ◽  
Spontaneous Polarization ◽  
Solution Method ◽  
Michelson Interferometer ◽  
Ferroelectric Materials ◽  
Ferroelectric Ceramics ◽  
Electric Field Induced Strain

In this study, leadbased ferroelectric ceramics Pb0.91La0.09Zr0.65Ti0.35O3 PLZT (9/65/35) were fabricated by solid solution method. The electrical and mechanical properties were measured by modified Michelson interferometer and Sawyer-Tower circuit to investigate electric field induced strain and polarization (s-P-E) of PLZT (9/65/35) at 30-70 °C. The induced strain and polarization were changed when the temperature was increased indicating the change of spontaneous polarization inside the ferroelectric materials.

scholarly journals New Aspects in the Mechanical Behavior of a Polycarbonate Found by an Experimental Study

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Alfredo Alán Rey Calderón ◽  
Alberto Díaz Díaz
Keyword(s):  
Mechanical Behavior ◽  
Axial Strain ◽  
Strain Curve ◽  
Uniaxial Tensile ◽  
Creep Recovery ◽  
Transverse Strain ◽  
Key Aspects ◽  
Transverse Strains ◽  
Compressive Tests

The aim of this paper was to analyze in detail the mechanical behavior of a polycarbonate by means of uniaxial tensile and compressive tests and to reveal new key aspects that must be taken into account in any predictive model. Uniaxial monotonic and creep-recovery tests were carried out at a variety of temperatures, stress levels, and load rates to get a complete description of the material response. Prior to mechanical testing, the material was subjected to a thermal rejuvenation in order to eliminate any previous aging and to obtain reliable and useful results. In every test, a complete determination of the strain state was assured by measuring axial and transverse strains with strain gauges. During the tests, significant asymmetry effects and viscous phenomena already reported by other authors were confirmed. The newest finding is that a nonlinear master transverse strain/axial strain curve matches perfectly with the experimental curves. This master curve is temperature- and rate-independent. Another originality of this paper is the disclosure of an instantaneous, hypoelastic-like behavior at high strain rates. The experimental observations presented in this study should be incorporated by a theoretical model whose aim is to accurately predict the mechanical behavior of polycarbonate subjected to any 3D stress state.

Temperature Dependence on Ferroelectric, Energy Storage Density, and Electric Field-Induced Strain Response of Lead-Free Bi0.485(Na0.388K0.097)Ba0.021Sr0.009TiO3 Ceramics

2019 ◽  
Vol 201 (1) ◽  
pp. 142-154
Author(s):  
Pharatree Jaita ◽  
Narumon Lertcumfu ◽  
Gobwute Rujijanagul
Keyword(s):  
Energy Storage ◽  
Electric Field ◽  
Temperature Dependence ◽  
Lead Free ◽  
Strain Response ◽  
Energy Storage Density ◽  
Storage Density ◽  
Optimum Density ◽  
Electric Field Induced Strain

In this research, Bi0.485(Na0.388K0.097)Ba0.021Sr0.009TiO3 or BNKBSrT ceramic sintered at various temperatures from 1100 °C to 1150 °C were investigated. The optimum density (5.80 g/cm3), mechanical (HK = 5.3 GPa, HV = 4.1 GPa, E = 62 GPa, and KIC = 1.35 MPa m1/2), dielectric (εr = 1525, tanδ = 0.0566), piezoelectric (d33 = 172 pC/N, g33 = 12 × 10−3 Vm/N), electric field-induced strain (Smax = 0.32%, d*33 = Smax/Emax = 640 pm/V, Q33 = 0.0340 m4/C2), and energy storage (W = 0.55 J/cm3, η = 67.2% @ 150 °C) were obtained for the ceramic sintered at 1125 °C.

Large Electric Field-Induced Strain Response Under a Low Electric Field in Lead-Free Bi1/2Na1/2TiO3-SrTiO3-BiAlO3 Ternary Piezoelectric Ceramics

2020 ◽  
Vol 49 (11) ◽  
pp. 6677-6685
Author(s):  
Hoang Thien Khoi Nguyen ◽  
Trang An Duong ◽  
Farrukh Erkinov ◽  
Chang Won Ahn ◽  
Byeong Woo Kim ◽  
...  
Keyword(s):  
Electric Field ◽  
Piezoelectric Ceramics ◽  
Lead Free ◽  
Strain Response ◽  
Large Electric Field ◽  
Electric Field Induced Strain

Strain and Current Responses During Electron Flux Excitation of Piezoelectric Ceramics

2002 ◽  
Author(s):  
Philip C. Hadinata ◽  
John A. Main
Keyword(s):  
Electric Field ◽  
Electrode Potential ◽  
Current Flow ◽  
Electron Flux ◽  
Piezoelectric Materials ◽  
Negative Control ◽  
Internal Electric Field ◽  
Strain Response ◽  
Opposite Face ◽  
Electric Field Induced Strain

The electric field induced strain in piezoelectric materials subjected to an electron flux is examined in this paper. An analysis using quantum mechanics indicates that stable and controllable strains with very low current draw should be achievable over a range of positive and negative control potentials. The model also predicts an instability in the internal electric field at larger negative potentials. The model was evaluated by observing the strain output of PZT5h plates subjected to an electron flux on one face and voltage inputs from a single electrode on the opposite face. The strain response and current flow were measured as a function of electrode potential and electron energy. All of the significant predictions of the model were verified by the experimental results. Further experiments were performed to examine the time response of the strain induced in the plate. It was found that the location and potential of the electron collector dramatically influences the dynamic response of the system.

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