Fig 4 - uploaded by Hazim Bašić
Content may be subject to copyright.
-Distribution of effective strain rate for different values of 0 . The presented method of determination of borders between the rigid and plastic zones is also applied to a plane strain forward extrusion through a conical die and extrusion ratio 0,25, Fig. 5. The maximum friction is applied on the conical part of die and zero friction on other contact surfaces. The workpiece material is assumed as rigid-perfectly plastic with σ Y =14 MPa and the prescribed ram velocity is v 0 =2 mm/s. The discretised solution is presented on Fig. 5a. The viscosity distribution given in Fig. 5b is obtained for 0 0,9 and this distribution is in good correlation with experimentally obtained results [9], Fig. 6.
Source publication
The theory of plasticity is in poor condition relative to linear elasticity. All existing formulations are approximate at best, and few have any connection to the fundamental (micromechanical) material mechanism responsible. For this reason, all plasticity theories must be considered empirical. Even worse, detailed testing of a plasticity theory re...
Similar publications
State-of-the-art workflows within Architecture, Engineering, and Construction (AEC) are still caught in sequential planning processes. Digital design tools in this domain often lack proper communication between different stages of design and relevant domain knowledge. Furthermore, decisions made in the early stages of design, where sketching is use...
L’utilisation des matières composites est fortement conditionnée par la capacité du constructeur ou du sous-traitant à dimensionner les structures automobiles sous divers types de chargements complexes tel que la fatigue. Le présent travail de thèse a pour objectif de développer un outil de modélisation par transition d’échelles couplée à une appro...
We present a modified model order reduction (MOR) technique for the FFT-based simulation of composite microstructures. It utilizes the earlier introduced MOR technique (Kochmann et al. [2019]), which is based on solving the Lippmann-Schwinger equation in Fourier space by a reduced set of frequencies. Crucial for the accuracy of this MOR technique i...
The present research focuses on proposing a novel theoretical micromechanical model (TMM) designed to derive the frequency-dependent storage and loss moduli of woven fabric (WF)-matrix composites, as well as WF-particulate matrix (Hybrid) composites, based on their constituent properties. The TMM serves as a higher-order modulus operator, accountin...
In this work, new experimental methods and techniques for the analysis of the microscopic and the micromechanical material behavior of nickel-and iron-based superalloys are developed with the emphasis on the material characteristics and processes at smallest length scales. Superalloys are high performance structural materials which are for instance...
Citations
... There are many solid mechanics problems which can be equivalently considered from the fluid mechanics perspective, for example, in the analysis of extrusion and drawing. Eulerian "fluid" approaches are often used to solve such problems, for example, [46, 48, 50-52, 54, 286, 287, [381][382][383][384][385][386][387][388][389][390][391][392][393]. These methods are more closely related to CFD procedures and are not discussed further here. ...
Since early publications in the late 1980s and early 1990s, the finite volume method has been shown suitable for solid mechanics analyses. At present, there are several flavours of the method, which can be classified in a variety of ways, such as grid arrangement (cell-centred vs. staggered vs. vertex-centred), solution algorithm (implicit vs. explicit), and stabilisa- tion strategy (Rhie–Chow vs. Jameson–Schmidt–Turkel vs. Godunov upwinding). This article gives an overview, historical perspective, comparison and critical analysis of the different approaches where a close comparison with the de facto standard for computational solid mechanics, the finite element method, is given. The article finishes with a look towards future research directions and steps required for finite volume solid mechanics to achieve more widespread acceptance.