کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
733401 1461626 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Variation of fracture mode in micro-scale laser shock punching
ترجمه فارسی عنوان
تغییر حالت شکست در مقیاس میکروسکوپ لنز ضربه
کلمات کلیدی
شوک لیزری، میکرو مشت زدن، حالت شکستگی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
چکیده انگلیسی


• Effect of the ratio of beam diameter (d) to die hole diameter (D) is studied.
• The fracture mode of metal foils varies as the ratio d/D changes.
• The crack location of metal foils is strongly related to the ratio d/D.
• The stress state under the different ratios is simulated and discussed.

Micro-scale laser shock punching is a high strain rate micro-forming method which uses the high-amplitude shock wave pressure induced by pulsed laser irradiation. The response of brass and pure titanium foils under the different ratio of laser beam diameter (d) to die hole diameter (D) in micro-scale laser shock punching was investigated experimentally and numerically. The typical fracture surface morphologies were observed using scanning electron microscope. Numerical simulations were conducted to predict the stress state of the workpiece before and after fracture. The influence of the ratio d/D on dynamic deformation and fracture of metal foils was characterized. The results demonstrate that both the crack locations and fracture surface morphologies of metal foils are strongly related to the ratio d/D. The fracture mode varies from a shear fracture mode to a mixed fracture mode, then to a tensile fracture mode as the ratio decreases. The stress state under the different ratio is discussed in detail and believed to be responsible for the variation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics & Laser Technology - Volume 72, September 2015, Pages 25–32
نویسندگان
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