We noticed you’re not on the correct regional site. Switch to our AMERICAS site for the best experience.
  • BS EN 843-5:2006

    Current The latest, up-to-date edition.
    Add to Watchlist
    This Standard has been added successfully to your Watchlist
    Please visit My Watchlist to see all standards that you are watching.
    Please log in or to add this standard to your Watchlist.
    We could not add this standard to your Watchlist.
    Please retry or contact support for assistance.
    We could not add this standard to your Watchlist.
    Please retry or contact support for assistance.
    You have already added this standard to your Watchlist.
    Visit My Watchlist to view the full list.

    Advanced technical ceramics. Mechanical properties of monolithic ceramics at room temperature Statistical analysis

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  31-01-2007

    Publisher:  British Standards Institution

    Add to Watchlist

    Add To Cart

    Table of Contents - (Show below) - (Hide below)

    Foreword
    1 Scope
    2 Normative references
    3 Terms and definitions
      3.1 Flaws
      3.2 Flaw distributions
      3.3 Mechanical evaluation
      3.4 Statistical terms
      3.5 The Weibull distribution
    4 Symbols
    5 Significance and use
    6 Principle of calculation
      6.1 Maximum likelihood method
      6.2 Bias correction
      6.3 Confidence interval
    7 Procedure
      7.1 Graphical representation of data
      7.2 Determination of Weibull parameters
          by maximum likelihood method
      7.3 Determination of limits of the confidence
          interval
    8 Test report
    Annex A (informative) Relationship between
            characteristic strengths of test pieces
            or components of different size or
            shape, or with different stress fields
            applied
    Annex B (informative) FORTRAN program for
            calculating Weibull parameters
    Annex C (informative) PASCAL program for
            calculating Weibull parameters
    Annex D (informative) BASIC program for
            calculating Weibull parameters
    Annex E (normative) Unbiasing factors for
            estimation of Weibull modulus, m
    Annex F (normative) Confidence factors for
            characteristic strength, sigma[0]
    Annex G (normative) Confidence factors for
            Weibull modulus, m
    Annex H (informative) Worked examples
    Annex I (informative) Example test report
    Bibliography

    Abstract - (Show below) - (Hide below)

    Describes a method for statistical analysis of ceramic strength data in terms of a two-parameter Weibull distribution using a maximum likelihood estimation technique. It assumes that the data set has been obtained from a series of tests under nominally identical conditions.

    Scope - (Show below) - (Hide below)

    This part of EN 843 specifies a method for statistical analysis of ceramic strength data in terms of a two-parameter Weibull distribution using a maximum likelihood estimation technique. It assumes that the data set has been obtained from a series of tests under nominally identical conditions. NOTE 1 In principle, Weibull analysis is considered to be strictly valid for the case of linear elastic fracture behaviour to the point of failure, i.e. for a perfectly brittle material, and under conditions in which strength limiting flaws do not interact and in which there is only a single strength-limiting flaw population. If subcritical crack growth or creep deformation preceding fracture occurs, Weibull analysis can still be applied if the results fit a Weibull distribution, but numerical parameters may change depending on the magnitude of these effects. Since it is impossible to be certain of the degree to which subcritical crack growth or creep deformation has occurred, this European Standard permits the analysis of the general situation where crack growth or creep may have occurred, provided that it is recognized that the parameters derived from the analysis may not be the same as those derived from data with no subcritical crack growth or creep. NOTE 2 This European Standard employs the same calculation procedures as method A of ISO 20501:2003, but does not provide a method for dealing with censored data (method B of ISO 20501).

    General Product Information - (Show below) - (Hide below)

    Committee RPI/13
    Development Note Supersedes DD ENV 843-5. (01/2007)
    Document Type Standard
    Publisher British Standards Institution
    Status Current
    Supersedes
    Under Revision

    Standards Referencing This Book - (Show below) - (Hide below)

    ISO/IEC 17025:2005 General requirements for the competence of testing and calibration laboratories
    ISO 20501:2003 Fine ceramics (advanced ceramics, advanced technical ceramics) Weibull statistics for strength data
    EN 843-1 : 2006 ADVANCED TECHNICAL CERAMICS - MECHANICAL PROPERTIES OF MONOLITHIC CERAMICS AT ROOM TEMPERATURE - PART 1: DETERMINATION OF FLEXURAL STRENGTH
    ENV 1006 : DRAFT 2003 ADVANCED TECHNICAL CERAMICS - MONOLITHIC CERAMICS - GUIDANCE ON THE SELECTION OF TEST PIECES FOR THE EVALUATION OF PROPERTIES
    ISO 2602:1980 Statistical interpretation of test results Estimation of the mean Confidence interval
    ISO 3534-1:2006 Statistics — Vocabulary and symbols — Part 1: General statistical terms and terms used in probability
    • Access your standards online with a subscription

      Features

      • Simple online access to standards, technical information and regulations
      • Critical updates of standards and customisable alerts and notifications
      • Multi - user online standards collection: secure, flexibile and cost effective