کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6703303 1428511 2018 41 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Multi-scale computational analysis of unidirectional carbon fiber reinforced polymer composites under various loading conditions
ترجمه فارسی عنوان
تجزیه و تحلیل محاسباتی چند بعدی کامپوزیت پلیمرهای تقویت شده با فیبر کربن یکسو جهت تحت شرایط بارگذاری مختلف
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
A multi-scale computational analysis based on representative volume element (RVE) modeling and molecular dynamics (MD) simulations is developed to investigate the microscopic failure mechanisms of unidirectional (UD) carbon fiber reinforced polymer (CFRP) composites. The average properties of the 200-nm thickness interphase region between fiber and matrix are characterized through MD simulations and an analytical gradient model. The results demonstrate that the interphase region has higher Young's modulus and strength, compared to the bulk matrix. This stiffened interphase region influences the composite response significantly. Specifically, the traditional two-phase model with zero-thickness interface fails to capture the stress-strain behavior compared to the experimental data. However, by adding the interphase region to a modified RVE model, the accuracy of simulation results will be improved significantly. Furthermore, a coupled experimental-computational micromechanics approach is adopted to calibrate and validate the cohesive parameters of the interface. By including the cohesive interface, our modified RVE model accurately captures the failure strength of the composites. Finally, different failure mechanisms for specimens are investigated using our multi-scale computational framework. The results show that the failure modes of UD CFRP composites are very complex and multiple failure mechanisms co-exist depending on the loading conditions, agreeing well with our experimental analyses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composite Structures - Volume 196, 15 July 2018, Pages 30-43
نویسندگان
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