Thermo-mechanical behaviour of TRIP 1000 steel sheets subjected to low velocity perforation by conical projectiles at different temperatures

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:47

Article

Rodriguez-Martinez, J. A.¹  Pesci, R.²  Rusinek, A.³  Arias, A.¹  Zaera, R.¹  Pedroche, D. A.¹ 

[1] Univ Carlos III Madrid, Dept Continuum Mech & Struct Anal, Madrid 28911, Spain

[2] ENSAM, FRE CNRS 3236, LPMM, F-57078 Metz 3, France

[3] Natl Engn Sch Metz ENIM, Lab Mech Biomech Polymers & Struct, F-57000 Metz, France

关键词: Martensitic transformation;    Sheet steel;    Perforation;    Dynamic plasticity;    Dynamic failure;   

DOI  :  10.1016/j.ijsolstr.2010.01.013

来源: Elsevier

【 摘 要 】

This paper presents and analyzes the behaviour of TRIP 1000 steel sheets subjected to low velocity perforation by conical projectiles. The relevance of this material resides in the potential transformation of retained austenite to martensite during impact loading. This process leads to an increase in strength and ductility of the material. However, this transformation takes place only under certain loading conditions strongly dependent on the initial temperature and deformation rate. In order to study the material behaviour under impact loading, perforation tests have been performed using a drop weight tower. Experiments were carried out at two different initial temperatures T-0 = 213 K and T-0= 288 K, and within the range of impact velocities 2.5 m/s <= V-0 <= 4.5 m/s. The experimental setup enabled the measuring of impact velocity, residual velocity, load-time history and failure mode. In addition, dry and lubricated contacts between the striker and the plate have been investigated. Finally, by using X-ray diffraction it has been shown that no martensitic transformation takes place during the perforation process. The causes involving the none-appearance of martensite are examined. (C) 2010 Elsevier Ltd. All rights reserved.

【 授权许可】

Free