کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
659175 1458090 2012 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Assessing the influence of four cutting methods on the thermal contact resistance of open-cell aluminum foam
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Assessing the influence of four cutting methods on the thermal contact resistance of open-cell aluminum foam
چکیده انگلیسی

The application of open-cell aluminum foam often involves a cutting operation to the desired shape and dimensions. Depending on the applied cutting method, this operation can result in a significantly different contact surface area between the foam and a substrate, and a substantial plastic deformation of the struts near the cutting plane. Both are characterised for four cutting methods: circular saw, band saw, sawing wire and electron discharge machining. The first two methods result in a significant local compression. No compression is observed with the other two methods. However, the eroding nature of electron discharge machining results in blunt strut-ends which minimise the contact surface area. The highest contact surface area is obtained with a sawing wire cut.The thermal contact resistance is deduced from experimental data obtained from a press-fit bonding with 0.5 MPa pressure between foam and substrate. Data analysis is done via a conventional zeroth-order thermal resistance model. The highest thermal contact resistance is found for a sample cut with a circular saw. Cutting with band saw reduces this with 25%, electron discharge machining yields a reduction of 36% and sawing wire results in 64% reduction of the press-fit thermal contact resistance.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 55, Issues 21–22, October 2012, Pages 6142–6151
نویسندگان
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