کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
821989 906776 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of additives on the global mechanical behavior and the microscopic strain localization in wood reinforced polypropylene composites during tensile deformation investigated using digital image correlation
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Influence of additives on the global mechanical behavior and the microscopic strain localization in wood reinforced polypropylene composites during tensile deformation investigated using digital image correlation
چکیده انگلیسی

The structural integrity of polypropylene (PP) matrix composites reinforced by natural wood fibers is investigated by digital image correlation (DIC) coupled with tensile tests. The use of the material as an alternative construction material requires extensive understanding of its micromechanical properties, which primarily define its performance. Addition of several additives such as coupling agents is common practice for such materials. These ingredients improve the performance of these materials mainly by improvement of the chemical and physical interactions between the nonpolar matrix and the polar wood fibers. These interactions facilitate the transfer of the applied deformation particularly in the interphase region between the polymer matrix and the reinforcing fibers. Such localized changes can influence the performance of the material specially its micromechanical behavior. The DIC via photogrammetry was used to study the spatial distribution of the accumulated plastic surface strain, which is based on pattern recognition of the surface before and after straining. The heterogeneous strain distribution reveals a structural inhomogeneity of the material. The magnitude of local strain was much higher than the global strain, suggesting preferred regions for plastic deformation formed by the microstructure.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Science and Technology - Volume 69, Issue 2, February 2009, Pages 139–146
نویسندگان
, , , , ,