A Finite Element Program (FECGS): Post-Processor FEPOST - GKSS

3.9. *PARAMETER: GENERATING A TABULAR LIST 43
3.9.8 *T-STRESS: Evaluating the T -stress
*T-STRESS, suboption of *PARAMETER command, is used for evaluating the elastic T -stress.
The details of the formulation for calculating the T -stress is given in section 5.1. This option
works for both homogeneous material and bimaterial interfacial crack.
The following parameters are required:
RADIUS Set this parameter equal to radius where T -stress is going to be calculated.
START ANGLE Set this parameter equal to an angle in degree (0 - 360 ◦ ).
END ANGLE Set this parameter equal to an angle in degree (0 - 360 ◦ ). Radius, start
angle and end angle define a part of circle to evaluate the T -stress.
NUM Number of points to be used to calculate the T -stress.
KI Set this parameter equal to Jn××.
Format Entry
The following data line is required:
4F E1, Po1, E2, Po2. Ei and Poi are a pair of Young’s modulus
and Poisson’s ratio used for calculating the K from
J-integral. For the homogeneous material, only first pair
is needed, whereas, four numbers are need for a bimaterial
interface crack.
Examples:
1. Use the following entry to conduct T -stress calculation along a given circle of radius 1.0 from
0 ◦ to 90 ◦ .
*T-STRESS, RADIUS=1.0, START ANGLE=0, END ANGLE=90
90000.0, 0.3, 90000.0, 0.3