کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7213350 | 1469418 | 2014 | 44 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Quasi-static energy absorption of hollow microlattice structures
ترجمه فارسی عنوان
جذب انرژی نیمه استاتیک از سازه های میکروالیتی توخالی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی (عمومی)
چکیده انگلیسی
We present a comprehensive modeling and numerical study focusing on the energy quasi-static crushing behavior and energy absorption characteristics of hollow tube microlattice structures. The peak stress and effective plateau stress of the hollow microlattice structures are deduced for different geometrical parameters which gives volume and mass densities of energy absorption, Dv and Dm, scale with the relative density, ϯ, as DVâ¼Ï¯1.5 and Dmâ¼Ï¯0.5, respectively, fitting very well to the experimental results of both 60° inclined and 90° predominately microlattices. Then the strategies for energy absorption enhancement are proposed for the engineering design of microlattice structures. By introducing a gradient in the thickness or radius of the lattice members, the buckle propagation can be modulated resulting in an increase in energy absorption density that can exceed 40%. Liquid filler is another approach to improve energy absorption by strengthening the microtruss via circumference expansion, and the gain may be over 100% in terms of volume density. Insight into the correlations between microlattice architecture and energy absorption performance combined with the high degree of architecture control paves the way for designing high performance microlattice structures for a range of impact and impulse mitigation applications for vehicles and structures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Part B: Engineering - Volume 67, December 2014, Pages 39-49
Journal: Composites Part B: Engineering - Volume 67, December 2014, Pages 39-49
نویسندگان
Yilun Liu, Tobias A. Schaedler, Alan J. Jacobsen, Xi Chen,