Rights:
© 2008 American Physical Society (APS). This is the accepted version of the following article: Alava, Mikko J. & Nukala, Phani K. V. V. & Zapperi, Stefano. 2008. Role of Disorder in the Size Scaling of Material Strength. Physical Review Letters. Volume 100, Issue 5. 055502/1-4. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.100.055502, which has been published in final form at http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.100.055502.