چکیده مقاله
Updated standards in safety of vehicles and related facilities have led to use of smart designs and advanced manufacturing techniques The shock generated at impacts could cause serious damages both to the system’s structure and the human body A conventional method used to reduce the impact shock is to employ cellular material, e g low density foams in forms of sandwich structures In the present work, performance of fiberglass epoxy composite panels with Expanded Polystyrene EPS foam core under low velocity impact is enhanced by employing 3D printable lattice structure inside the sandwich panel Lattice structure is designed based on re entrant auxetic pattern and it is manufactured using ABS material Tests are conducted numerically using LS DYNA explicit code at two different impact speeds Results are discussed based on rigid body acceleration of the impactor to investigate the effect of adding auxetic structure on the shock attenuation Furthermore, core arrangement of upgraded specimen is changed in three different ways are results are presented
کلیدواژهها
نویسندگان
Nima Zahedan
MSc, Faculty of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
Hamed Ahmadi
Assistant Prof , Faculty of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
غلامحسین لیاقت
Professor, Faculty of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
شیوه ارجاع
Zahedan, Nima and Ahmadi, Hamed and Liaghat, GholamHossein,1399,Numerical study of composite sandwich panels with compound cellular core of auxetic lattice structure and foam under low velocity impact load.,17th National Conference and 6th International Conference on Manufacturing Engineering,Tehran
ارائهشده در
مجموعه مقالات هفدهمین همایش ملی و ششمین کنفرانس بین المللی مهندسی ساخت و تولید12 اسفند 1399 · تهران