Calculations of theoretical strength: State of the art and history

• DOI: 10.1007/s10820-004-4567-2
• Publication Date: 2005-03-21T18:34:08Z
• Authors: J. Pokluda; M. Černý; P. Šandera; M. Šob
• Keywords: Micromechanics; Schematic; Mechanical strength

Current state and historical evolution of theoretical strength calculations is presented as a brief overview completed by a database of selected theoretical and experimental results. Principles of a sophisticated analysis of mechanical stability of crystals are elucidated by means of a schematic example. Stability conditions and Jacobian matrixes are presented for selected crystalline symmetries and deformation paths. The importance of this analysis for understanding micromechanics of fracture is shown against the background of the influence of crystal defects. Differences between theoretical and experimental theoretical strength (TS) values are discussed and some challenging tasks are outlined for the near future.