What is BS ISO 20501 - Assessing the strength of fine ceramics about?
Fine Ceramics are used in advanced-technology industries. They are a high-performance subset of the ceramic family. BS ISO 20501 covers the reporting of uniaxial strength data and the estimation of probability distribution parameters for advanced ceramics which fail in a brittle fashion.
BS ISO 20501 is restricted to the assumption that the distribution underlying the failure strengths is the two-parameter Weibull distribution with size scaling. Furthermore, BS ISO 20501 is restricted to test specimens (tensile, flexural, pressurized ring, etc.) that are primarily subjected to uniaxial stress states. BS ISO 20501 outline methods of correcting for bias errors in the estimated Weibull parameters, and calculating confidence bounds on those estimates from data sets where all failures originate from a single flaw population. In samples where failures originate from multiple independent flaw populations, the methods outlined in BS ISO 20501 for bias correction and confidence bounds are not applicable.
Who is BS ISO 20501 - Assessing the strength of fine ceramics for?
BS ISO 20501 on assessing the strength of fine ceramics is useful for organizations associated with:
- Ceramic manufacturing
- Electronics components manufacturing
- Quality control teams
- Product designing teams
Why should you use BS ISO 20501 - Assessing the strength of fine ceramics?
The failure strength of advanced ceramics is treated as a continuous random variable. Typically, a number of test specimens with well-defined geometry are brought to failure under well-defined isothermal loading conditions. The load at which each specimen fails is recorded. The resulting failure stresses are used to obtain parameter estimates associated with the underlying population distribution.
Measurements of the strength at failure are taken for one of two reasons: either for a comparison of the relative quality of two materials regarding fracture strength, or the prediction of the probability of failure for a structure of interest. BS ISO 20501 permits estimates of the distribution parameters which are needed for either. In addition, BS ISO 20501 encourages the integration of mechanical property data and fractographic analysis.
The guidelines in BS ISO 20501 walks you through the method of assessing the strength of fine ceramics so that end customers get a superior quality product.
What’s changed since the last update?
BS ISO 20501:2019 supersedes ISO 20501:2003. BS ISO 20501:2019 includes some technical changes concerning ISO 20501:2003. These include:
- The terms and definitions in Clause 3 have been updated and modified
- A method to treat a higher number of specimens (N > 120) has been introduced for method A: maximum likelihood parameter estimators for single flaw populations
- In Annex D, example codes have been added for calculating the maximum likelihood parameters of the Weibull distribution with modern analysis software