کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
253170 502988 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A micro-kink theory for determination of shear modulus of a unidirectional composite lamina
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
A micro-kink theory for determination of shear modulus of a unidirectional composite lamina
چکیده انگلیسی

A hitherto unavailable concept of fiber micro-kink responsible for microscopic shear damage is introduced. Fiber micro-kinking is caused by crystallite disorientations, as detected by the Raman and X-ray measurements, inside a carbon fiber. In addition, the fibers themselves, constituting a unidirectional composite lamina, may contain micro-flaws such as fiber misalignment. The matrix material is assumed to be linear elastic. A mechanistic (as opposed to empirical) approach for derivation of the constitutive relation in shear, based on the concept of micro-kinking (caused by crystallite disorientations) and fiber misalignment, is developed. This is the shear counterpart of the micro-cracking theory for damage assessment of composites under tension. An expression for the nonlinear shear modulus is derived based on the assumption of uniform distribution of micro-kinks and fiber misalignment defects.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composite Structures - Volume 92, Issue 2, January 2010, Pages 395–400
نویسندگان
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