کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
776241 1464055 2016 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modelling and characterization of cell collapse in aluminium foams during dynamic loading
ترجمه فارسی عنوان
مدل سازی و مشخص کردن فروپاشی سلول در فوم های آلومینیومی در هنگام بارگذاری پویا
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی


• Plate impact experiments have been carried out on closed-cell aluminium foams.
• A micro-computed tomography based geometry was developed for modelling studies.
• Wave propagation mechanisms through the closed-cell Al foams have been investigated.
• Cell collapse mechanisms have been explored during plate-impact loading.

Plate-impact experiments have been conducted to investigate the elastic–plastic behaviour of shock wave propagation and pore collapse mechanisms of closed-cell aluminium foams. FE modelling using a meso-scale approach has been carried out with the FE software ABAQUS/Explicit. A micro-computed tomography-based foam geometry has been developed and microstructural changes with time have been investigated to explore the effects of wave propagation. Special attention has been given to the pore collapse mechanism. The effect of velocity variations on deformation has been elucidated with three different impact conditions using the plate-impact method. Free surface velocity (ufs) was measured on the rear of the sample to understand the evolution of the compaction. At low impact velocities, the free-surface velocity increased gradually, whereas an abrupt rise of free-surface velocity was found at an impact velocity of 845 m/s with a copper flyer-plate which correlates with the appearance of shock. A good correlation was found between experimental results and FE predictions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Impact Engineering - Volume 96, October 2016, Pages 78–88
نویسندگان
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