کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7984254 | 1514783 | 2013 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Localized deformation in aluminium foam during middle speed Hopkinson bar impact tests
ترجمه فارسی عنوان
تغییر شکل موضعی در فوم آلومینیوم در طول آزمون سرعت ضربه متوسط ضربه هاپکینسون
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کلمات کلیدی
مشخصات مکانیکی، روش عنصر محدود مواد متخلخل پلاستیک فوم آلومینیوم، شکاف نوار فشار هوپکینسون،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
چکیده انگلیسی
Split Hopkinson pressure bar (SHPB) technique is a widely adopted method to study the dynamic mechanical behaviors of materials. However, the strong localization of the deformation in aluminium foams (near the ends of the specimen) may invalidate the assumption of uniform strain within the specimen granted in the analysis of SHPB results. To appraise how critical this issue could be, the deformation process of aluminium foam under middle speed impact was investigated by combining SHPB technique with high speed photography. Based on the experimental results, finite element analysis was carried out to explore the characteristics of the localized deformation in aluminium foam. The strain distribution was quantitatively analyzed and showed the dependence on the imposed strain rate. An evaluation of the deformation localization by defining maximum loacalized strain and strain rate indicates that the maximum strain and strain rate in the specimen can be more than 100% higher than the average values.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 560, 10 January 2013, Pages 734-743
Journal: Materials Science and Engineering: A - Volume 560, 10 January 2013, Pages 734-743
نویسندگان
Bao Yang, Liqun Tang, Yiping Liu, Zejia Liu, Zhenyu Jiang, Daining Fang,