Stress-dependent Electrical Resistance Model for Fatigue Lifetime Calculation of 48MnV Steel

2012 ◽  
Vol 4 (23) ◽  
pp. 617-625
Author(s):  
Binxiang Sun ◽  
Qiuwei Yang ◽  
Lijun Yang ◽  
Qi Liu
Keyword(s):  
Electrical Resistance ◽  
Fatigue Lifetime ◽  
Resistance Model ◽  
Stress Dependent

The Microstructural, Mechanical and Electro-Mechanical Properties of Graphene Aerogel-PVDF Nanoporous Composites

2014 ◽  
Vol 29 ◽  
pp. 1-6 ◽  
Author(s):  
Guang Ping Zheng ◽  
Z. Han ◽  
Y.Z. Liu
Keyword(s):  
Electrical Resistance ◽  
High Performance ◽  
Vinylidene Fluoride ◽  
Mechanical Relaxation ◽  
Graphene Aerogel ◽  
Energy Harvesters ◽  
Poly Vinylidene Fluoride ◽  
Mechanical Behaviours ◽  
Stress Dependent ◽  
Hybrid Scaffolds

Graphene aerogel-poly (vinylidene fluoride) (GA-PVDF) nanoporous composites with different concentrations of PVDF are fabricated. Scanning electron microscopy reveals that PVDF films with a typical thickness below 100 nm are coated at the graphene sheets in the nanoporous composites. The GA-PVDF composites show excellent compressibility, ductility and mechanical strength, as well as better sensitivity of stress-dependent electrical resistance compared with those of GAs. The improved mechanical and electro-mechanical behaviours of nanoporous composites are ascribed to the PVDF which possesses piezoelectricity. The structural properties of the graphene-PVDF nanosized hybrid scaffolds are analyzed by dynamical mechanical relaxation. The results demonstrate that the nanoporous composites could be used as high-performance sensors, actuators and kinetic energy harvesters.

Electrical Resistance Model of a Bilayer-Coated Spherical Contact

2018 ◽  
Vol 8 (9) ◽  
pp. 1614-1620 ◽  
Author(s):  
Oleg Korchevnik ◽  
Roman Goltsberg ◽  
Yuri Kligerman ◽  
Izhak Etsion
Keyword(s):  
Electrical Resistance ◽  
Spherical Contact ◽  
Resistance Model

scholarly journals Bending Strain and Bending Fatigue Lifetime of Flexible Metal Electrodes on Polymer Substrates

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2490 ◽  
Author(s):  
Tae-Wook Kim ◽  
Jong-Sung Lee ◽  
Young-Cheon Kim ◽  
Young-Chang Joo ◽  
Byoung-Joon Kim
Keyword(s):  
Flexible Electronics ◽  
Electrical Resistance ◽  
Metal Electrode ◽  
Substrate Thickness ◽  
Metal Electrodes ◽  
Fatigue Lifetime ◽  
Bending Fatigue ◽  
Bending Strain ◽  
Bending Fatigue Test ◽  
Flexible Metal

As the technology of flexible electronics has remarkably advanced, the long-term reliability of flexible devices has attracted much attention, as it is an important factor for such devices in reaching real commercial viability. To guarantee the bending fatigue lifetime, the exact evaluation of bending strain and the change in electrical resistance is required. In this study, we investigated the bending strains of Cu thin films on flexible polyimide substrates with different thicknesses using monolayer and bilayer bending models and monitored the electrical resistance of the metal electrode during a bending fatigue test. For a thin metal electrode, the bending strain and fatigue lifetime were similar regardless of substrate thickness, but for a thick metal film, the fatigue lifetime was changed by different bending strains in the metal electrode according to substrate thickness. To obtain the exact bending strain distribution, we conducted a finite-element simulation and compared the bending strains of thin and thick metal structures. For thick metal electrodes, the real bending strain obtained from a bilayer model or simulation showed values much different from those from a simple monolayer model. This study can provide useful guidelines for developing highly reliable flexible electronics.

New Method of Interfacial and Micro-damage Sensing of Composites Via Pencil Lead Drawing Paper Sensor (PLDPS) and Electrical Resistance (ER) Mapping

2019 ◽  
Author(s):  
Joung-Man Park ◽  
Ha-Seung Park ◽  
Pyeong-Su Shin ◽  
Jong-Hyun Kim ◽  
Yeong-Min Baek ◽  
...  
Keyword(s):  
Electrical Resistance ◽  
New Method ◽  
Damage Sensing ◽  
Pencil Lead ◽  
Paper Sensor
Sign in / Sign up

Export Citation Format

Share Document