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Yield function of the orthotropic material considering the crystallographic texture
Yaroslav A. Erisov,Fedor V. Grechnikov,Sergei V. Surudin 국제구조공학회 2016 Structural Engineering and Mechanics, An Int'l Jou Vol.58 No.4
On the basis of the energy approach it is reported a development of the yield function and the constitutive equations for the orthotropic material with consideration of the crystal lattice constants and parameters of the crystallographic texture for the general stress state. For practical use in sheet metal forming analysis it is considered different loading scenarios: plane stress and plane strain states. Using the proposed yield function, the influence of single ideal components on the shape of yield surface was analyzed. The six texture components investigated here were cube, Goss, copper, brass, S and rotated cube, as these components are typically observed in rolled sheets from FCC alloys.
RESEARCH OF DIFFERENT PROCESSES FOR FORMING FIBER METAL LAMINATES
Dmitrii Chernikov,Yaroslav Erisov,Ilia Petrov,Sergei Alexandrov,Lihui Lang 한국자동차공학회 2019 International journal of automotive technology Vol.20 No.Supp
The paper presents the results of forming rifts in five-layer fiber reinforced metal polymer laminates by electromagnetic forming. During the experimental studies the discharge energy of the electro-magnetic machine was varied in such a way as to achieve different depths of the rift. Samples obtained by electro-magnetic forming were compared with control samples obtained by forming using a rubber pad under static loading. The strain state of the samples was analyzed using an digital image correlation system Vic-3D. The experimental research of fiber reinforced metal laminates forming under the influence of pulse magnetic field has shown the possibility of formability increasing due to change of strain state: the rift zone is dominated by compressive circumferential strains, rather than tensile radial strains as during conventional rubber pad forming.