Plastic Deformation Behavior of Metal Materials: A Review of Constitutive Models

Abstract

The deformation behavior of metal materials in plastic forming is intimately related to deformation conditions, which are greatly affected by deformation rate, forming temperature, and plastic variables. Macroscopic mechanical properties research is an important basis and technical means to analyze the process parameters and deformation process of metal plastic forming. Therefore, to reveal the influence mechanism of macroscopic mechanical properties of metal materials, and establish material constitutive models under different deformation conditions, it is of great significance to choose reasonable forming parameters and prevent forming defects. There are substantial variances in the macroscopic mechanical characteristics of different materials in the deformation process. In order to accurately predict its deformation behavior, the phenomenological constitutive model, the microscopic constitutive model reflecting the microscopic deformation mechanism, and the artificial neural network constitutive model based on the neural network were constructed respectively on the basis of macroscopic mechanical tests and microscopic microstructure tests. On the basis of the existing research results, the advantages and disadvantages of phenomenological constitutive model, microscopic constitutive model, and neural network constitutive model are compared and analyzed, respectively. The research results of this paper will provide support for the selection of constitutive models for reasonably predicting the deformation behavior of metal materials.

A Review of Dynamic Mechanical Behavior and the Constitutive Models of Aluminum Matrix Composites

“…The phenomenological constitutive model is based on experimental data and utilizes techniques such as data fitting to determine the influence of strain, strain rate, and temperature on the dynamic mechanical behaviors of materials. Among them, the Johnson-Cook model, which is the most widely used in the field of elastic-plastic impact calculations, is a representative of this type of constitutive model [74,92].…”

Optimizing Thermomechanical Processing of Bimetallic Laminates

“…These two final swaging passes were selected for the subsequent investigations leading to the optimization of the swaging degree based on the assessment of the (sub)structure and the related mechanical and electrical properties. The swaging degrees after the investigated swaging passes were calculated using relation (1):…”

“…Processes of plastic deformation are advantageous not only for imparting the required geometries to the produced work pieces and components but also for controlling their structures and, consequently, their properties, lifetime, and performance [1][2][3]. The methods can be divided into two basic groups, i.e., conventional (e.g., rolling, forging, drawing, and extrusion) and unconventional methods.…”

True stress-strain identification accounting for anisotropy of sheet metals

“…Advanced high-strength sheet metals are often characterized by pronounced anisotropy resulting from the technological processes to which they are subjected, making their characterization more challenging. In the literature, numerous testing methodologies [1] and advanced material models [2] have been proposed. However, regardless the approach, the fundamental step is to obtain the material's flow curve through a classical tensile test on a dog-bone specimen.…”