کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1575798 1514760 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Grain scale modeling of the bendability of AA6xxx Al alloy sheet
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Grain scale modeling of the bendability of AA6xxx Al alloy sheet
چکیده انگلیسی

Bending sheet metal is a common shaping operation but, at high strains, may lead to failure that is difficult to predict from either standard mechanical tests or models. A recent experimental study of bending AA 6xxx sheet for automotive applications has shown that through-thickness strain localization controls damage development. Here, a new finite element microstructure based model of the standard bending test is introduced to predict strain localization during bending. The sheet metal is modeled as a grain aggregate, each grain having its own flow stress. The model is validated by comparison with a standard model and experimental results through an analysis of the critical plastic strain at the outer surface. It is applied to the bending of industrial AA6xxx sheet alloys and correctly describes the respective influences of sheet thickness, grain size and shape, and work hardening. In particular the model brings out the primary importance of large-strain hardening and the flow stress distribution width. It can be used to give simple guidelines for designing highly bendable sheet metal.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 583, 20 October 2013, Pages 96–104
نویسندگان
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