Angst, Blogging Challenges, M.A.T. Protected: All my possessions for a moment of time. ~Elizabeth 1 By Jyllian M November 8, 2009 April 4, 2012 angst, M.A.T., nablopomo This content is password protected. To view it please enter your password below: Password: “I would rather be ashes than dust! If the stress exceeds a critical value,the material will undergo plastic, or irreversible, deformation. This critical stress can be tensile or compressive.