A Novel Geometry for Shear Test Using Axial Tensile Setup. Proceedings, 2.Basel, SwitzerlandMultidisciplinary Digital Publishing Institute (MDPI). (2018).
This paper studies a novel geometry for the in-plane shear test performed with an axialelectromechanical testing machine. In order to investigate the influence of the triaxiality rate on themechanical 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 beemployed to minimize the impact of the testing device. As a consequence, for the shear tests, thegeometry of the specimen must be carefully designed in order to adapt the force value and make itcomparable to the one obtained for the tensile tests. Like most of the existing shear-included tensiletest specimens, the axial loading is converted to shear loading at a particular region through theeffect of geometry. A symmetric shape is generally preferred, since it can restrict the in-planerotation of the shear section, keep shear increasing in a more monotonic path and double the forcelevel thanks to the two shear zones. Due to the specific experimental conditions, such as dimensionsof the furnace and the clamping system, the position of the extensometer or the restriction of sheetthickness (related to the further studies of size effect at mesoscale and hot temperature), severalgeometries 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 someadvantages. For instance, a relatively low triaxiality in the shear zone, limited in-plane rotation andno necking are observed. Moreover, it also prevents any out-of-plane displacement of the specimenwhich seems to be highly sensitive to the geometry, and presents a very limited influence of thematerial and the thickness.
نوع الوثيقة:
conferenceObject
اللغة:
English
Relation:
18th International Conference on Experimental Mechanics, Brussels, Belgique (1-5 juillet 2018)
