NGHIEN C U T U - T R A O D O I NGHIEN CU'U, DANH GIA A N H HU'ONG CUA VAT LIEU LAM KHUNG VO Tdi HANH KHACH KHI VA CHAM BANG PHAN MEM ANSYS LS-DYNA EXPLORE, ASSESS THE EFFECT OF MATERIAL FRAME MAKING TO PASSENGERS IN CRASH WITH ANSYS LS-DYNA TS Nguyen Khac HuanS KS Pham Diic Thang^ 'TrUdng Si quan Cdng binh ^Trfldng Trung cap KTCN Nhdn Trach TOM TAT Bdi bdo ndy trinh bdy ddnh gid dnh hUdng ciia vdt lieu ldm khung vo den hdnh khdch va chgm bdng phdn mem mo phong Ansys LS-DYNA vdphdn tich dUlieu tren phdn mem Hyperview Qud trinh mo phong bdi todn giup nhom nghien cdu khdo sdt dUOc tinh khd thi cua viec thay the vgt lieu thep truyen thong ngdnh sdn xudt to tgi Viet Nam bdng vdt lieu mdi composite Ben cgnh do, qud trinh mo phong cdn giup tiet kiem thdi gian qud trinh thiic hiin de tdi nhd cho phep ngUdi lap trinh de ddng thay doi goc va chgm, van toe va chgm mgt each linh dgng, de ddng dgt dUdc hieu qud kinh te cao qud trinh thii nghiem thiic te Tft khoa: Ansys LS-DYNA; Solidworks; Hyperview; Composite; va chgm The current paper assessed the effects of material frame making to passengers in crash by simulating on Ansys LS-DYNA and and analyzing the datas on Hyperview The aim of this simulation helped group of researchers surveyed the feasibility of replacing traditional steel in the automotive manufacturing industry in Vietnam with new composite materials In addition, the simulation process also saves time in the process to implement the project by allowing programmers to easily change the angle of impact, the velocity of impact on a flexible, easy to achieve economic results during the actual test Keywords: Ansys LS-DYNA; Solidworks; Hyperview; Composite; impact; crash TAP CHf CO KHf VIET NAM, Sd S niim 2014 www.cokhivietnam.\ n '' NGHIEN CljrU-TRA0€)6l GIOI THIEU Giam tU trpng cua xe va tang tinh an toan bi ddng la hai yeu td quan trpng qua trinh thi€t ke khung vd d td Trong thiet ke chong va cham td, thUdng mpt sd phan tren cua xe se dflpc che tao tfl nhiia tong hpp de hap thu nang IflcJng Ddng thdi cau triic cac phan cua xe ciing dflpc thiet k^ cho kha nang hap thu nang lUdng la cao nhat nham muc dich tang dp tin cay va an toan cho ngUdi va xe Viec kiem tra sU chong va cham hay an toan cua ngUdi va xe dflpc danh gia bang qua trinh phan tich va cham Qua trinh danh gia va cham thudng dflpc thfle hien theo cac phUdng phap sau: - Thii nghiem va cham xe; - Md phdng qua trinh va cham bang cac phan mem Lfla chpn phuong phap dau tien cd tinh chinh xac va dp tin cay cao nhflng chi phi va thdi gian thfle hien cao, vay, chfla phu hpp vdi dieu kien hien tai Viet Nam Hien nay, viec ling dung cac phan mem de md phdng va cham gifla hai xe ciing mang lai dp chinh xac cao ddng thdi giam bdt chi phi va thdi gian tien hanh thiic nghiem De tflng bfldc xay dflng mpt phap qui ve tinh toan thiet ke khung vd dtd chd khach ciing nhfl cac tieu chuan ap dung bat budc ddi vdi tinh ben khung vd dtd chd khach mang thfldng hieu Viet Nam, cd tinh den yeu cau ve ket cau, vat heu cua khung vd xe cd the tU bao ve xuat hien va cham Do vay, bai bao nhdm tac gia da sfl dung phan mem md phdng Ansys LS-DYNA va phan tich dfl lieu tren phan mem Hyperview de xac dinh anh hUdng ciia vat lieu lam khung vd xe d td tdi hanh khach va cham nham xac dinh kha nang chong va cham ciia v^t heu lam khiuig vo xe thdng qua cac ti^u chuan an toan ve ngfldi cua chau Au M O H I N H PHAN TILT HtTU HAN VA CAC TIEU CHUAN A N T O A N C H O NGU'OI KHI VACHAM Ky thuat phan tich bai toan ddng li(c hpc va cham tdc thdi bang each md phdng ANSYS la ky thuat dimg de xac dinh phan flng cua ket cau dUdi tac dpng ciia tai phu thudc thdi gian Ta cd the sfl dung kieu phan tich de xac dinh cac chuyen vi, bien dang, flng suat va lUc bien thien theo thdi gian Qua trinh md phdng cung cSp mpt each chi tiet cac hien tflpng vat ly xay ket cliu cua mo hinh tfl giup cho cac ky sfl cd the dieu chinh dupc trfldc hoan thien thiet ke trfldc dfla vao san xuat Md phdng qua trinh va cham dUdc thiic hien bang each sfl dung cac phan mem mo phdng phan tfl hflu han Mdt md hinh phan tfl hflu han dupc thiet ke va nhap vao mdi trfldng ANSYS LS-DYNA vdi cac dieu kien bien, tai trpng va ki^u phan tfl dflpc dinh nghia sat vdi cac dieu kien va cham thiic te 2.1 M6 hinh phan tvi huCu h a n Md hinh khung vd td va hanh khach dupc thiet ke mdi trfldng Solidworks {hinh 1), dupc xuat file *IGES Sau do, nh^p sang phan mem Hypermesh de xay dflng phan tfl hflu han, mdi trfldng bang vi?c sfl diing phuong phap chia lUdi automesh tren tflng mang cfla ket cau khung xe (kieu phan tii SHELL 163), md hinh phan tfl hflu ban dflflc the hien (hinh 2) TAP CHI C O KHf VIET NAM S6 nam 2014 www.cokhivietnam.vn NGHIEN CUTU-TRAODdl gidi han 1000; Trong dd: ^head' ^ ^ ^ ^^^ ^^^ ngUdi; t: Thdi gian tac dpng va cham Tieu chuan chan thUPng d ngUc SI SI=f\^^^^] S J dt Vdi b^i^^^^: La gia toe cua ngUc t: La thdi gian tac ddng va cham MO PHONG THf NGHIEM Hinh 2: Mo hinh phdn td hUu han Md phdng va cham dUpc chia lam trUdng hpp ddi vdi xe cd ket cau vat lieu thep CT3, sau thay the cac trfldng hpp lan Iflpt bing vat lieu composite vdi cac dieu kien gidng Tieu chuan chan thUPng d dau HIC, (bang 1): 2.2 Cac tieu chu^n an toan cho ngfldi va cham TT I Goc va cham 90" 90" 27« 43» Bdttg Cac truung hop mo phong Dieu kien va cham Van toe (Vi: Xe va chain, VQ; Xe bi va cham) Vl = 15 km/h, Vo = km/h Vl = 20 km/h, Vo = 10 km/h Vl = 20 km/h, VQ = 10 km/h V, = 48 km/h, Vo = 10 km/h Ma mo phong Ml M2 M3 M4 KET QUA VA D A N H G I A Mo phong cac trudng hop (bang 1) vdi vat lieu Iam khung vo bSng thep sau thay bing vat lieu composite ta duoc cac ket qua nhu phan 4.1; 4.2 Mgt so hinh anh va cham trudng hop M1, the hien hinh 3,4 TAP CHf CO KHI VIET NAIVI, So nam 20 i «WH.cokhivietnam.vn ' NGHIEN CflU - TRAO £)6l Hinh 3: Khung vo bdng vdt lieu thep Hinh 4: Khung vo bdng vgt liiu composite Ket qua khao sat mdt sd nut dien hinh dUpc dat tren hanh khach gdm: -Nut 137681: Tren dau cua hanh khach; -Nflt 347278: Tren ngflc cua hanh khach; -Nut 349295: Tren dui cua hanh khach Ket qua nhan dflpc nhfl sau: Trong dd: -Dfldng mau xanh nfldc bien thi trUdng hpp M l ; - Dudng mau dd thi trUdng hpp M2; -Dudng man xanh la cay thi trUdng hpp M3; -Dudng mau tim nhat dd thi trUdng hpp M4 4.1 Gia tdc tai cac niit khao sat xe sfl dung vat lieu thep ' s/ m, Hinh 5: Gia toe tgi nut 137681 • — " I i - - " " ^ - ' ^ Hinh 6: Gia tdc tai nut 347278 TAP CHf CO KHf V I £ T NAM Sd nam www.cokhivietnam.vn 2014 NGHIEN cufu - TRAO D P I Til ^m Hinh 7: Gia toe tai nut 349325 4.2 Gia toe tai cac niit khao sat xe sii dung vat lieu composite Hinh 8: Gia tdc tai nut 137681 composite •4^ Hinh 9: Gia tdc tai nut 347278 composite l._i ^M^ Hinh 10: Gia toe tai nut 349325 composite TAP CHi CO KHf V I £ T NAM, So nim 2014 ww>\.cokhivietnam.vn NGHIEN cufu - TRAO eOl Theo bieu thdi gian va cham den hanh khach tren xe sfl dung vat li^u composite da giam di rat nhieu so vdi xe sfl dung vat Ueu thep Lflc tac dpng cung giam sfl hap thu nang Ifldng cua vat Heu composite Ket qua thu dUpc theo tieu chuan HIC va tieu chuan SI Tmdng hap Tieu chuan HIC Ti^u chuan SI Vat lieu Ihep Composite Thep Composite Ml 1048.17 788.44 1056.68 869.57 M2 845.33 511.82 684.75 625.83 M3 759.92 378.49 649.55 416.14 M4 3108.22 1063.28 3959.33 1015.64 KET LUAN TU bieu gia toe ta thay thdi gian hanh khach chiu tac dong va cham thay th^ bang vat lieu composite giam di rat nhieu Cac gia tri theo tieu chuan HIC cho thay xe sU dung vat lieu composite luon thap han so vdi vat lieu thep cacbon Kha nang hap thu nang lUdng cua vat lieu composite carbon fiber la rat cao, vi vay no giam chan thuong va cham Til ket qua tren cho thay cd the sU dung vat heu composite cong nghiep de san xuat khung vd d td khach vi nd cd tinh nang giam va cham rat t6t.