کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1584502 1514901 2007 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Relative influence of microstructure and macroscopic triaxiality on cavitation damage in a semi-crystalline polymer
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Relative influence of microstructure and macroscopic triaxiality on cavitation damage in a semi-crystalline polymer
چکیده انگلیسی

The relative influence of microstructure on mechanical behaviour and cavitation in a semi-crystalline polymer is studied here and compared to the macroscopic triaxiality effect induced by the sample shape. Microstructure effects result from process or annealing. In the later case, DSC and DMA experiments show secondary crystallization, homogenization of primary crystals and decrease of the amorphous phase mobility.Samples shapes exhibiting more or less macroscopic triaxiality are tested in tension before and after annealing at high temperature. More cavitation is observed after annealing – or in slowly cooled down materials – in weakly triaxial structures (dumbbell specimens or diabolo specimens with a large curvature radius). In highly triaxial samples (diabolo specimens with a small curvature radius) no difference are observed between as-received and annealed samples: the macroscopic hydrostatic stress is then of major importance compared to the raise of local hydrostatic stress within the amorphous layer resulting from high-temperature annealing.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 448, Issues 1–2, 15 March 2007, Pages 56–66
نویسندگان
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