Plastic limit load and its application to the fracture toughness testing for heterogeneous single edge notch tension specimens Academic Article uri icon


  • ABSTRACTThe current investigation pursues the confirmation of the applicability of the limit load solutions in determination of the factors necessary for fracture toughness testing protocols. The procedure begins with the correct calculation of limit load values in welded single edge notch tension (SE(T)) fracture specimens containing centreline cracks. Hence, the factor is inferred through the principle of potential energy. Additionally, such results are compared with those obtained from finite element analyses, including strain hardening effects available in the literature. SE(T) specimens subject to pinloading display that the factors are insensitive to the configurational effects and hardening properties. On the other hand, in clamped SE(T) specimens, such effects become meaningful, making its usage in fracture toughness experiments questionable. This work provides an alternative methodology to compute fully plastic proportionality coefficients () based on limit load solutions for heterogeneous cracked SE(T) specimens. These analyses also consider the limitations and potentialities of such an approach in experimental measurements of ductile crack growth.

published proceedings


author list (cited authors)

  • Paredes, M.

citation count

  • 14

complete list of authors

  • Paredes, M

publication date

  • March 2014