Designing Multifunctional Polymer Composite for Disaster Monitoring

2012 ◽  
Author(s):  
Cumaraswamy Vipulanandan ◽  
Srisothinathan Pakeetharan
Keyword(s):  
Cantilever Beam ◽  
Polymer Composite ◽  
Cross Sections ◽  
Applied Pressure ◽  
Construction Materials ◽  
Structural Response ◽  
Beam Element ◽  
Polymer Composite Material ◽  
Nonlinear Stress ◽  
Relationship Of

In this study, a piezoresistive structural sensor (multifunctional material) was developed and a cantilever beam element with varying cross sections was designed and tested to measure low pressures for use during disaster events such as hurricanes. The piezoresistive structural polymer composite material developed in this study had a compressive strength of over 65 MPa (9425 psi), considered to be stronger than the standard construction materials. Also the piezoresistive material was over 30 times more sensitive than the resistance strain gages in detecting strain. The compressive stress-strain relationship of the polymer composite was modeled using a non-linear relationship. The constitutive behavior of the piezoresistive material was modeled using incremental nonlinear stress-resistivity relationship. The structural response of the cantilever beam with varying cross sections was analyzed using the finite element method. With the newly developed cantilever beam element it was possible to magnify the piezoresistive response and detect applied pressure as small as 1.4 kPa (∼0.2 psi) with a change in electrical resistivity of 0.5%.

Effect of Physical Nonlinearity on Vibrations of Piezoelectric Rods

Aerospace ◽  
2005 ◽  
Author(s):  
Victor Birman
Keyword(s):  
Structural Response ◽  
Axial Direction ◽  
Physical Nonlinearity ◽  
Sensors And Actuators ◽  
Stress Strain ◽  
Alternating Electric Field ◽  
Nonlinear Stress ◽  
Strain Relationship ◽  
The Subject ◽  
Relationship Of

Nonlinear stress-strain relationships (physical nonlinearity) may have a large effect on the structural response of piezoelectric sensors and actuators. The paper addresses the subject concentrating on cylindrical piezoelectric rods that experience vibrations as a result of an alternating electric field applied in the axial direction. The problem considered in the paper is important in connection with design of piezoelectric transducers. It is shown that neglecting the non-linear stress-strain relationship of the piezoelectric material can result in a significant error in the predicted response of the transducer.

Material adaptation technology for automated tape laying of aviation polymer composite material

2019 ◽  
Vol 0 (2) ◽  
pp. 22-28
Author(s):  
A.M. Kudrin ◽  
◽  
O.A. Karaeva ◽  
K.S. Gabriel’s ◽  
◽  
...  
Keyword(s):  
Composite Material ◽  
Polymer Composite ◽  
Polymer Composite Material

scholarly journals Analysis of Wire-Cut Electro Discharge Machining of Polymer Composite Materials

Micromachines ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 571
Author(s):  
Timur Rizovich Ablyaz ◽  
Evgeny Sergeevich Shlykov ◽  
Karim Ravilevich Muratov ◽  
Sarabjeet Singh Sidhu
Keyword(s):  
Theoretical Model ◽  
Pulse Duration ◽  
Polymer Composite ◽  
Process Parameters ◽  
Polymer Composite Material ◽  
Matrix Analysis ◽  
Design Matrix ◽  
Correction Factors ◽  
Electro Discharge Machining ◽  
Variable Voltage

This study presents the analysis of wire-cut electro-discharge machining (WIRE-EDM) of polymer composite material (PCM). The conductivity of the workpiece is improved by using 1 mm thick titanium plates (layers) sandwiched on the PCM. Input process parameters selected are variable voltage (50–100 V), pulse duration (5–15 μs), and pause time (10–50 μs), while the cut-width (kerf) is recognized as an output parameter. Experimentation was carried out by following the central composition design (CCD) design matrix. Analysis of variance was applied to investigate the effect of process parameters on the cut-width of the PCM parts and develop the theoretical model. The results demonstrated that voltage and pulse duration significantly affect the cut-width accuracy of PCM. Furthermore, the theoretical model of machining is developed and illustrates the efficacy within the acceptable range. Finally, it is concluded that the model is an excellent way to successfully estimate the correction factors to machine complex-shaped PCM parts.

Sign in / Sign up

Export Citation Format

Share Document