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**r7.02.09** Weibull model identification
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**Summary**

Here we address the problem of identifying the parameters of the WEIBULL model on a test sample representative of the fracture behavior of a brittle material (typically, ferritic steel at low temperature). The linear regression method and the maximum likelihood method are the two methods used. The principle and associated resolution methods are detailed, based in both cases on an iterative process. Finally, their extension is shown in the case where one of the two parameters of this model (the cleavage stress) depends on the temperature.

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    1____Introduction
    2____Rappels
    3____M_thode_de_la_r_gression_lin_aire
    4____M_thode_du_maximum_de_vraisemblance
    5____D_pendance_des_param_tres_avec_la_temp_rature
    6____Conclusion
    7____Bibliographie
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