Abstract

In this paper, a method for quantitatively evaluating the integral, directly from the measured near-tip displacement field in laboratory specimens made of metallic materials, is presented for the first time. Following Okada and Atluri (Okada, H., Atluri, S.N., 1999. Further studies on the characteristics of the integral: plane stress stable crack propagation in ductile materials. Computational Mechanics), it is shown that quantifies the deformation energy dissipated near the crack tip region (an elongating strip of height) per unit crack extension. To directly evaluate the integral from the measured displacement field near an advancing crack tip, the use of the deformation theory of plasticity (J2-D theory), and the truncation of the near crack T integral path just behind the advancing crack tip, are suggested. This suggestion is validated through some careful numerical computations. The results basedontheexperimental studiesofOmoriet al.(Omori, Y., Okada, H.,Atluri, S.N.,Kobayashi, A.S. T integral analysis for SEN specimen using Moire interferometry. ATEM’95 (International Symposium on Advanced Tecnology in Experimental Mechanics JSME [Japan Society of Mechanical Engineering]), submitted for publication) show good agreement with the results of finite element analysis. The latter T values were computed with a full-finite element analysis based on a J-flow theory, using a full elongating path, as well as with the use of ‘‘cut-oA’’ integral path, and the use of J-D plasticity. # 1999 Elsevier Science Ltd. All rights reserved.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.