کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5206105 1502949 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Shape optimization of a cruciform geometry for biaxial testing of polymers
ترجمه فارسی عنوان
بهینه سازی شکل یک هندسه کریستالی برای آزمایش دوگانه پلیمرها
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
The presented literature review of cruciform shapes used for biaxial characterization of materials indicates that the majority of shapes can be divided into two large groups when the following selection criteria are taken into consideration: (i) the shape of the outer boundaries and (ii) the load capacity needed to achieve failure in the biaxial region. Manipulation of the outer shape boundaries appears to be essential to bundle the applied loads to the central zone where failure is intended to be built up. For each group, one particular cruciform design is reported whereby the outer boundaries are based on a single curved shape. Although the use of discontinuous double radii edges should be avoided according to earlier reports [1,2], it is shown here through the construction of an optimization algorithm, that the use of a single curve for the outer boundaries leads to strains in the arms that are strongly dependent on these single curved edges. Numerical simulations based on the finite element method as well as experiments performed on polymeric test pieces in combination with DIC measurements, show good agreement on this matter and demonstrate this sensitivity very clearly.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Testing - Volume 41, February 2015, Pages 7-16
نویسندگان
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