Special finite elements for the analysis of flaw growth and fracture in fiber composites

✍ Scribed by S.S Wang; J.F Mandell; F.J McGarry

• Publisher: Elsevier Science
• Year: 1976
• Tongue: English
• Weight: 59 KB
• Volume: 8
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(76)90068-0

✦ Synopsis

In this paper, comparisons of fracture stress values obtained in graphite/epoxy composites with the predictions of the model are made. The experimental results of Brinson and Yeow[l] on unidirectionsl composites using double edge notch tensile coupons were used. The calculations are performed usinp the results of finite-ekment calculations on double edge notch specimens with various crack length to specimen width ratios and crack angles. From these results, the displacement held to be imposed at the outer bouodaries of the LHR is determined. Then, separate LHR calculations are performed for each experiment of interest. By forcing the computational result to match one experiment, the critical energy icvel for crack growth can be established. This value is then used to predict the failure loads in other cases. REFERENCE [I] H. F. Brinson and Y. T. Ycow, An investigation of the failure and fracture behavior of graphite/epoxy laminates. VPEE-75-23, Sept. 1975.