Comparison of Single Crystal Simple Shear Deformation Experiments with Crystal Plasticity Finite Element Simulations

Abstract

polymer substrates. The type of conductive filler considerably determines the characteristics of nucleation, growth and the electroforming of the product microstructures.The development of an ideal 2-component combination, also besides the commercially available polymers, is necessary. Here, also the use of polymer material, which is intrinsically conductive because of the chemical polymer structure, will promise interesting results.A further important part of investigations will be the production of metallic mold inserts for the injection molding of templates of the important hole type and the following electroforming and replication.Electrochemical investigations like voltamograms i = f(E) and transients i = f(t) on the properties of conductive polymers will exhibit detailed qualitative and quantitative information about the processes at the interface polymer-electrolyte. This article presents an investigation on the evolution of the crystallographic texture and of the equivalent strain distribution during simple shear deformation of a pure Al single crystal. Previous studies in which we presented detailed comparisons between crystal plasticity finite element simulations and corresponding experiments under plane strain load revealed in part a disturbing influence of friction on the results. [1±6] This effect impedes the validation of advanced crystal plasticity finite element methods. ReceivedFriction between the tool and the specimen introduces two main problems into such tests rendering validation efforts a difficult task: First, it introduces additional shear stress components of unknown magnitude. Second, its magnitude changes during loading in an unknown fashion as deformation proceeds. Hence, a more quantitative approach lies in using simple shear deformation experiments since they do not involve friction.The structure of this article is as follows: First, we provide a concise review of earlier work on simple shear experiments. Second, we describe the experimental procedure. Third, we give a brief introduction to the model approach and explain how we determined the parameters of the underlying constitutive model. Fourth, we compare the experimental observations with the model predictions in terms of the texture evolution and the strain distribution.

Overview of constitutive laws, kinematics, homogenization and multiscale methods in crystal plasticity finite-element modeling: Theory, experiments, applications

“…This point is relevant for size-dependent plasticity modeling, as the polarized portions of dislocation arrays (which are often conceptually treated as GNDs), 1 such as anticipated in many size effect models, must necessarily coincide with orientation gradients [210]. Such lattice rotations are nowadays accessible to precise and high-resolution measurements in 2-D and 3-D so that corresponding models can be tested [95,98,171,177,[214][215][216]. Fig.…”

“…The predictions of this non-local model were compared to simple shear experiments on commercially pure aluminum single crystals and to conventional viscoplastic CPFE simulations (Fig. 28) [24,98,406].…”

Experimental Characterization and Crystal Plasticity Modeling of Heterogeneous Deformation in Polycrystalline α-Ti

“…The computation was accomplished using a user subroutine developed at Max-Planck-Institut fu¨r Eisenforschung [33] and implemented in the commercial FEM package MSC.Marc (MSC.Software Corporation, Santa Ana, CA).…”

Nanomechanical Analysis of High Performance Materials

“…The crystal plasticity parameters mimicking the behavior of an Al single crystal adopted from Roters et al 2004) are listed in Table 3. 1) different ISE occur for different kinds of indenters.…”

“…Summary of the crystal plasticity parameters mimicking the mechanical properties of an Al single crystal(Roters et al 2004) …”