کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
770450 | 1463094 | 2015 | 15 صفحه PDF | دانلود رایگان |
• A method is presented to numerically evaluate the cyclic J-integral in ABAQUS/Standard.
• The method is validated for an elastic–plastic material that exhibits Masing behavior.
• Crack closure is taken into account in the simulations.
• The correlation of the cyclic J-integral and the cyclic crack-tip opening displacement is studied.
• The cyclic J-integral is the parameter to determine the cyclic crack-tip opening displacement.
In this paper, the correlation of the cyclic J -integral, ΔJΔJ, and the cyclic crack-tip opening displacement, ΔCTODΔCTOD, is studied in the presence of crack closure to assess the question if ΔJΔJ describes the crack-tip opening displacement in this case. To this end, a method is developed to evaluate ΔJΔJ numerically within finite-element calculations. The method is validated for an elastic–plastic material that exhibits Masing behavior. Different strain ranges and strain ratios are considered under fully plastic cyclic conditions including crack closure. It is shown that the cyclic J-integral is the parameter to determine the cyclic crack-tip opening displacement even in cases where crack closure is present.
Journal: Engineering Fracture Mechanics - Volume 134, January 2015, Pages 459–473