Testing of Human Cadaveric Functional Spinal Units to the ASTM Draft Standard, “Standard Test Methods for Static and Dynamic Characterization of Spinal Artificial Discs”

2008 ◽  
pp. 114-114-13 ◽  
Author(s):  
DB Spenciner ◽  
JA Paiva ◽  
JJ Crisco
Keyword(s):  
Test Methods ◽  
Standard Test ◽  
Dynamic Characterization ◽  
Draft Standard

Stresses in Multilayered Ceramics Subjected to Biaxial Flexure Tests

2008 ◽  
Vol 606 ◽  
pp. 79-92 ◽  
Author(s):  
C.H. Hsueh
Keyword(s):  
Solid Oxide Fuel Cells ◽  
Closed Form ◽  
Analytical Description ◽  
Test Methods ◽  
Standard Test ◽  
Fracture Load ◽  
Closed Form Solutions ◽  
American Society ◽  
Biaxial Flexure

Although standard test methods for biaxial strength measurements of ceramics have been established and the corresponding formulas for relating the biaxial strength to the fracture load have been approved by American Society for Testing and Materials (ASTM) and International Organization for Standardization, respectively, they are limited to the case of monolayered discs. Despite the increasing applications of multilayered ceramics, characterization of their strengths using biaxial flexure tests has been difficult because the analytical description of the relation between the strength and the fracture load for multilayers subjected to biaxial flexure tests is unavailable until recently. Using ring-on-ring tests as an example, the closed-form solutions for stresses in (i) monolayered discs based on ASTM formulas, (ii) bilayered discs based on Roark’s formulas, and (iii) multilayered discs based on Hsueh et al.’s formulas are reviewed in the present study. Finite element results for ring-on-rings tests performed on (i) zirconia monolayered discs, (ii) dental crown materials of porcelain/zirconia bilayered discs, and (iii) solid oxide fuel cells trilayered discs are also presented to validate the closed-form solutions. With Hsueh et al.’s formulas, the biaxial strength of multilayered ceramics can be readily evaluated using biaxial flexure tests.

Characterization of Bituminous, Intermediate-Level Waste Products

1988 ◽  
Vol 127 ◽  
Author(s):  
Z. Kopajtic ◽  
D. Laske ◽  
H. P. Linder ◽  
M. Mohos ◽  
M. Nellen ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Test Methods ◽  
Standard Test ◽  
Intermediate Level ◽  
Gas Generation ◽  
Γ Irradiation ◽  
Waste Products

ABSTRACTThe influence of γ-irradiation on the properties of two types of bituminous reprocessing waste has been studied. Standard test methods were adapted for use with radioactive samples. Measurements of penetration, gas generation, thermal stability and leaching of irradiated and non-irradiated samples have been compared.

Using Standards in a Competition to Measure and Solve Industrial Robotics Agility Challenges

2017 ◽  
Author(s):  
Anthony Downs ◽  
William Harrison ◽  
Craig Schlenoff
Keyword(s):  
Technology Transfer ◽  
State Of The Art ◽  
Industrial Applications ◽  
Test Methods ◽  
Standard Test ◽  
Industrial Robots ◽  
Industrial Robotics ◽  
Additional Information ◽  
Draft Standard ◽  
Push Forward

Researchers at the National Institute of Standards and Technology (NIST) have developed a set of draft standard test methods for measuring and promoting software agility in industrial robots. These test methods are being used as the basis for an upcoming competition called the Agile Robotics for Industrial Applications Competition (ARIAC). ARIAC is being used to promote and push forward the state of the art in software agility and enable technology transfer between academia and industry. This paper describes the background about the test methods, how they were developed, how they will be applied to the ARIAC Competition, and additional information about the ARIAC Competition.

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