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PREDICTION OF RESIDUAL STRESS AND STRAIN

IN COLD FORMING PROCESS

TIEN DOAN VE UNG SUAT DU" VA BIEN DANG

TRONG QUA TRINH TAO HINH NGUOl

Luu Thanh Tung

Faculty of Mechanical Engineering, Ho Chi Minh City University of Technology

ABSTRACT

The cold-forming process significantly enhance the mechanical properties of the profile

by strain hardening leading to increased resistance compared to a resistance assessment based

on nominal properties. It is thus necessary to accurately determine the mechanical properties

after the cold process of fabrication. In this paper, a spare part of car manufactured by the

cold-forming process is introduced. The simulation data calculated by finite element analysis

(FEA) and analytical solution are presented to solve residual stress and train. A comparison between

FEA and analytical solution for residual stress and train is then established. The solution has the

potential to replace laboratory tests to a large extent and can thus be deployed in future research

to minimize the need for expensive laboratory testing.

Keywords: Residual stress, strain.

TOM TAT

Qud trinh tgo hinh nguoi tdng cu&ng ddng ki cdc tinh chdt ca hpc cua chi tiit md hinh

thdnh do su bien cOng lam gia tdng khd ndng chiu tdc dpng ben ngodi. Vi the, cdn thiet de xdc

dinh chinh xdc tinh chdt ca hpc cua chi tiet sau qud trinh che tgo bien dgng ngupL Trong bdi bdo

ndy segi&i thieu mpt chi tiit phu tung cua 6 to dugc sdn xudt b&i qud trinh biin dgng nguoi. Cdc

die li^u mo phong tinh todn bdng cdch phdn tich phdn tu hieu hgn (FEA) vd gidi phdp phdn tich

dugc trinh bdy di gidi quyit ung sudt du vd bien dgng. Mpt so sdnh giica FEA vd gidi phdp phdn

tich cho ung sudt du vd biin dgng dugc thiet lap. Cdc gidi phdp co khd nang thay the cdc xet

nghiim trong phong thi nghiem v&i quy mo l&n vd do do cd thi dugc trien khai trong cdc nghiin

cuu trong tuang lai de gidm thieu nhu cdu thic nghiem trong phong thi nghiem ddt tiin.

Keywords: JJngsudtdu, biin dgng.

ISSN 0866 - 7056

TAP CHi CO KHi VIET NAM, S6 1+2 nam 2015

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