Scattering nature of exponent m of fatigue curve equation for design-like specimens made of typical aircraft material is analyzed. These specimens have hole and lug - the most wide spread stresses concentrators type in supporting elements of plane design. Selection of the material and stresses concentrator type at scattering analysis of m value are caused by material and type of such supporting elements of plane design failure of which under operating conditions is most probable or can be responsible for accidental or catastrophic consequences.
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