The calculation of J-integrals for cases with rotational effects using the finite or
boundary elements needs special treatment. In this work, an attempt is made to
derive the J-integral expressions for cases with rotational loading conditions. New
useful ideas for reducing domain integrals to boundary integrals and improving the
accuracy of J-integrals are developed. The new ideas are implemented in finite and
boundary element programs which were developed and validated in this work by
taking a case study of central-cracked rotating disc with known analytical solution.
The results of the developed programs show good agreements with the analytical