A Novel Geometry for Shear Test Using Axial Tensile Setup

Proceedings

Yuan, Sibo¹  Habraken, Anne-Marie²  Milis, Olivier³  Keller, Clément⁴  Duchêne, Laurent⁵  Hug, Eric⁶ 

[1] ArGEnCo Department, University of Liège, 4000 Liège, Belgium;Author to whom correspondence should be addressed.;Groupe de Physique des Matériaux, INSA Rouen, Université de Rouen, UMR CNRS 6634, 76800 Saint-Etienne du Rouvray, France;Laboratoire de Cristallographie et Science des Matériaux, UNICAEN, 14050 Caen, France;Laboratory for Materials and Structures, University of Liège, 4000 Liège, Belgium;Research Director of the Fonds de la Recherche Scientifique—FNRS, B-1000 Brussels, Belgium

关键词: in-plane shear;    thin specimen;    finite element simulation;   

DOI  :  10.3390/ICEM18-05277

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

This paper studies a novel geometry for the in-plane shear test performed with an axial electromechanical testing machine. In order to investigate the influence of the triaxiality rate on the mechanical behavior, different tests will be performed on the studied material: simple tensile tests, large tensile tests and shear tests. For the whole campaign, a common equipment should be employed to minimize the impact of the testing device. As a consequence, for the shear tests, the geometry of the specimen must be carefully designed in order to adapt the force value and make it comparable to the one obtained for the tensile tests. Like most of the existing shear-included tensile test specimens, the axial loading is converted to shear loading at a particular region through the effect of geometry. A symmetric shape is generally preferred, since it can restrict the in-plane rotation of the shear section, keep shear increasing in a more monotonic path and double the force level thanks to the two shear zones. Due to the specific experimental conditions, such as dimensions of the furnace and the clamping system, the position of the extensometer or the restriction of sheet thickness (related to the further studies of size effect at mesoscale and hot temperature), several geometries were brought up and evaluated in an iterative procedure via finite element simulations. Both the numerical and experimental results reveal that the final geometry ensures some advantages. For instance, a relatively low triaxiality in the shear zone, limited in-plane rotation and no necking are observed. Moreover, it also prevents any out-of-plane displacement of the specimen which seems to be highly sensitive to the geometry, and presents a very limited influence of the material and the thickness.

【 授权许可】

CC BY