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A Study on the Plastic Zone of the Specimen at the Impact of Dynamic Load  

한문식 (계명대학교 기계·자동차공학부)
조재웅 (천안공업대학 자동차과)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.12, no.3, 2004 , pp. 139-144 More about this Journal
Abstract
Dynamic crack initiation in ductile steel is investigated by means of impact loaded 3 point bend(PB) specimens. Results from non-viscoplastic and viscoplastic materials are compared. Their materials are applied with various impact velocities and static strain rates. The specimen has the size 320${\times}$750 mm with a thickness of 10 mm. A modified 3PB specimen design with reduced width at the ends has been developed in order to avoid the initial compressive load of the crack tip and also to avoid the uncertain boundary conditions at the impact heads. Numerical simulations are made by using the FEM code ABAQUS. Therefore, their results are plotted by shapes of the von Mises plastic stress and equivalent plastic strain of the specimens applied by various impact velocities.
Keywords
Viscoplastic material; Crack tip; von Mises plastic stress; Equivalent plastic strain; Impact velocity;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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