کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6708370 502946 2014 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An experimental/numerical investigation into the main driving force for crack propagation in uni-directional fibre-reinforced composite laminae
ترجمه فارسی عنوان
یک آزمایش آزمایشی / عددی برای نیروی اصلی حرکت برای انتشار کرم در لمینیت کامپوزیت تقویت شده فیبر نوری
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
This paper presents an enriched finite element method to simulate the growth of cracks in linear elastic, aerospace composite materials. The model and its discretisation are also validated through a complete experimental test series. Stress intensity factors are calculated by means of an interaction integral. To enable this, we propose application of (1) a modified approach to the standard interaction integral for heterogeneous orthotropic materials where material interfaces are present; (2) a modified maximum hoop stress criterion is proposed for obtaining the crack propagation direction at each step, and we show that the “standard” maximum hoop stress criterion which had been frequently used to date in literature, is unable to reproduce experimental results. The influence of crack description, material orientation along with the presence of holes and multi-material structures are investigated. It is found, for aerospace composite materials with E1E2 ratios of approximately 10, that the material orientation is the driving factor in crack propagation. This is found even for specimens with a material orientation of 90°, which were previously found to cause difficulty in both damage mechanics and discrete crack models e.g. by the extended finite element method (XFEM). The results also show the crack will predominantly propagate along the fibre direction, regardless of the specimen geometry, loading conditions or presence of voids.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composite Structures - Volume 107, January 2014, Pages 119-130
نویسندگان
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