Fracture Resistance Characterization of Superpave Mixtures Using the Semi-Circular Bending Test

2008 ◽  
pp. 129-129-15
Author(s):  
Z Wu ◽  
LN Mohammad ◽  
LB Wang ◽  
MA Mull
Keyword(s):  
Fracture Resistance ◽  
Bending Test

Fracture Resistance Characterization of Superpave Mixtures Using the Semi-Circular Bending Test

2005 ◽  
Vol 2 (3) ◽  
pp. 12264 ◽  
Author(s):  
Z Wu ◽  
LN Mohammad ◽  
LB Wang ◽  
MA Mull
Keyword(s):  
Fracture Resistance ◽  
Bending Test

Mechanical Property and Oxidation Behavior of LPS-SiC Materials

2006 ◽  
Vol 321-323 ◽  
pp. 913-916
Author(s):  
Sang Ll Lee ◽  
Yun Seok Shin ◽  
Jin Kyung Lee ◽  
Jong Baek Lee ◽  
Jun Young Park
Keyword(s):  
Mechanical Property ◽  
Fracture Toughness ◽  
Oxidation Behavior ◽  
Elevated Temperatures ◽  
Indentation Test ◽  
Bending Test ◽  
Secondary Phases ◽  
Three Point Bending ◽  
Different Temperatures

The microstructure and the mechanical property of liquid phase sintered (LPS) SiC materials with oxide secondary phases have been investigated. The strength variation of LPS-SiC materials exposed at the elevated temperatures has been also examined. LPS-SiC materials were sintered at the different temperatures using two types of Al2O3/Y2O3 compositional ratio. The characterization of LPS-SiC materials was investigated by means of SEM with EDS, three point bending test and indentation test. The LPS-SiC material with a density of about 3.2 Mg/m3 represented a flexural strength of about 800 MPa and a fracture toughness of about 9.0 MPa⋅√m.

scholarly journals Characterization of mortar fracture based on three point bending test and XFEM

2018 ◽  
Vol 11 (4) ◽  
pp. 339-344 ◽  
Author(s):  
Yucheng Huang ◽  
Yanhua Guan ◽  
Linbing Wang ◽  
Jian Zhou ◽  
Zhi Ge ◽  
...  
Keyword(s):  
Bending Test ◽  
Three Point Bending

Long-Term Reliability Assessment of Bioceramics for Artificial Joints Using Microdamage Monitoring by AE

2006 ◽  
Vol 309-311 ◽  
pp. 1191-1194
Author(s):  
Shuichi Wakayama ◽  
Teppei Kawakami ◽  
Junji Ikeda
Keyword(s):  
Critical Stress ◽  
Reliability Assessment ◽  
Physiological Saline ◽  
Bending Test ◽  
Unstable Fracture ◽  
Artificial Joints ◽  
Bending Tests ◽  
Four Point Bending

Microfracture process during bending tests of alumina ceramics used for artificial joints was evaluated by acoustic emission (AE) technique. Four-point bending tests were carried out in air, refined water, physiological saline and simulated body fluid. AE behavior during bending test inhibited the rapid increasing point of AE events and energy prior to the final unstable fracture. It was understood that the bending stress at the increasing point corresponds to the critical stress for maincrack formation. The critical stress was affected by water in environments more strongly than fracture strength. Consequently, it was suggested that the characterization of maincrack formation is essential for the long-term reliability assessment of load-bearing bioceramics.

Fabrication and characterization of flexible hybrid transparent electrodes with broadband transparency

2021 ◽  
pp. 2140023
Author(s):  
Keh-Moh Lin ◽  
Swapnil Shinde ◽  
Ru-Li Lin ◽  
Wen-Tse Hsiao ◽  
Pankaj Koinkar
Keyword(s):  
Sheet Resistance ◽  
Bending Test ◽  
Transparent Electrodes ◽  
Radio Frequency Sputtering ◽  
Light Region ◽  
Average Transmittance ◽  
Continuous State ◽  
Wide Range ◽  
Polyethylene Terephthalate Substrate

In this study, indium-zinc oxide (IZO)/silver (Ag)/IZO (ZAZ) flexible transparent electrodes were prepared on polyethylene terephthalate substrate using radio frequency sputtering technique. Experimental results showed that when the Ag film transited from semi-continuous state to continuous state, the ZAZ electrode exhibited high optoelectronic performance. The best ZAZ sample had a quite wide range of high transmittance and an average transmittance of 78.9% in visible light region, and sheet resistance of [Formula: see text]/sq and a Haacke Index of [Formula: see text]. The bending test revealed that the [Formula: see text] (change in sheet resistance) of ZAZ electrodes after 1000 bends was still less than 25% while the electrical properties of IZO films deteriorated after only 100 bending tests.

scholarly journals Characterization of Polyester Nanocomposites Reinforced with Conifer Fiber Cellulose Nanocrystals

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2838
Author(s):  
Grazielle da Silva Maradini ◽  
Michel Picanço Oliveira ◽  
Gabriel Madeira da Silva Guanaes ◽  
Gabriel Zuqui Passamani ◽  
Lilian Gasparelli Carreira ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Unsaturated Polyester ◽  
Cost Effective ◽  
Bending Test ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
Glass Fiber Composites ◽  
Superior Mechanical Properties ◽  
Polyester Matrix

The application of cellulose nanocrystal has lately been investigated as polymer composites reinforcement owing to favorable characteristics of biodegradability and cost effectiveness as well as superior mechanical properties. In the present work novel nanocomposites of unsaturated polyester matrix reinforced with low amount of 1, 2, and 3 wt% of cellulose nanocrystals obtained from conifer fiber (CNC) were characterized. The polyester matrix and nanocomposites were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), bending test, and thermogravimetric analysis (TGA). The result showed that the addition of only 2 wt% CNC increased the nanocomposite flexural strength by 159%, the ductility by 500% and the toughness by 1420%. Fracture analyses by SEM revealed a uniform participation of the CNC in the polyester microstructure. The resistance to thermal degradation of the CNC reinforced nanocomposites was improved in more than 20 °C as compared to neat polyester. No significant changes were detected in the water absorptions and XRD pattern of the neat polyester with incorporations up to 3 wt% CNC. These results reveal that the 2 wt% CNC nanocomposite might be a promising more ductile, lightweight and cost-effective substitute for conventional glass fiber composites in engineering applications.

scholarly journals Flexible Temperature Sensor Integrated with Soft Pneumatic Microactuators for Functional Microfingers

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Satoshi Konishi ◽  
Akiya Hirata
Keyword(s):  
Thin Film ◽  
Temperature Sensor ◽  
Output Voltage ◽  
Temperature Sensors ◽  
Seebeck Effect ◽  
Temperature Sensing ◽  
Bending Test ◽  
Contact Detection ◽  
Dissimilar Metals

Abstract The integration of a flexible temperature sensor with a soft microactuator (a pneumatic balloon actuator) for a functional microfinger is presented herein. A sensor integrated with a microactuator can actively approach a target for contact detection when a distance exists from the target or when the target moves. This paper presents a microfinger with temperature sensing functionality. Moreover, thermocouples, which detect temperature based on the Seebeck effect, are designed for use as flexible temperature sensors. Thermocouples are formed by a pair of dissimilar metals or alloys, such as copper and constantan. Thin-film metals or alloys are patterned and integrated in the microfinger. Two typical thermocouples (K-type and T-type) are designed in this study. A 2.0 mm × 2.0 mm sensing area is designed on the microfinger (3.0 mm × 12 mm × 400 μm). Characterization indicates that the output voltage of the sensor is proportional to temperature, as designed. It is important to guarantee the performance of the sensor against actuation effects. Therefore, in addition to the fundamental characterization of the temperature sensors, the effect of bending deformation on the characteristics of the temperature sensors is examined with a repeated bending test consisting of 1000 cycles.

Fracture Toughness Characterization of Carbon Bonded Alumina Using Chevron Notched Specimens

2017 ◽  
Vol 754 ◽  
pp. 71-74 ◽  
Author(s):  
H. Zielke ◽  
Martin Abendroth ◽  
Meinhard Kuna
Keyword(s):  
Fracture Toughness ◽  
Ceramic Material ◽  
Bending Test ◽  
Parameter Study ◽  
Zone Model ◽  
Displacement Curve ◽  
Notched Specimens ◽  
Load Displacement ◽  
Set Up

A new generation of multifunctional filters is made of carbon bonded alumina and is investigated within the collaborative research center 920 (CRC920). These filters are used during a casting process with the aim of reducing non-metallic inclusions in the cast product. The high thermal and mechanical loading of the filter requires a fracture mechanical characterization of the investigated ceramic material. In order to determine the fracture toughness of the ceramic material, a chevron-notched beam method (CNB) is applied. A 4-point-bending test set-up was constructed and brought into service, at which the load-displacement curve of small chevron-notched specimens (5 x 6 x 25 mm3) can be measured. The set-up offers the possibility of testing specimens at temperatures up to 1000oC. Preceding numerically work using the finite element method was performed to identify a suitable notch geometry. For this purpose a cohesive zone model was used. A parameter study is presented, which shows the influence of the notch parameter on the load-displacement curve.

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