Advanced Methods in Material Forming by Dorel Banabic

By Dorel Banabic

The publication comprises the main suitable papers provided within the foreign convention on fabrics Forming, ESAFORM 2005. The record less than provides the most profitable minisymposia of the conference:

    • New and complicated numerical thoughts in forming strategy simulation;
    • Sheet steel forming applied sciences and modeling;
    • Anisotropy and formability of fabrics;
    • Polymer processing and modeling;
    • Composite forming applied sciences and modeling;
    • Superplastic forming.

Plenary and keynote papers have been awarded by means of famous experts operating within the fields of sheet steel forming expertise, car undefined, modeling of the mechanical habit in addition to the elemental and business learn on polymeric fabrics. This quantity gathers chosen plenary and keynote papers awarded within the convention, delivering an up to date synthesis of the tutorial and commercial learn within the fields of actual and numerical modeling of fabrics forming approaches. The publication comes in handy for the doctoral fellows, scientists and engineers keen on a number of domain names of fabrics processing technology.

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G. Steinbeck, Sindelfingen 2004. M. L. F. V. pt Summary. The lack of accuracy of numerical results is still nowadays one of the main drawbacks of sheet metal forming process simulation. One of the main reasons for such a lack of accuracy is the constitutive models used to describe the real material’s mechanical behavior. The most widely used phenomenological constitutive model is based on the classical Hill 1948 yield criterion. In the last decade several new yield criteria have been proposed, with the constraint that a parameter identification procedure has not always been clearly set.

In fact, we still do not have a feasibility factor that would allows us to know if the numerically optimized solution will generate tube rupture or not. Aluminium Profiles: Using aluminium profiles space frame structure is an efficiency method to lighten vehicle compared to a steel Body-In–White. These profiles must be bent to allow shapes compatible for assembling with other parts of the body structure (see Fig. 8). In this study, applied to doorframe profile, we focus on stretch-wrap process with pre-deformation.

1 Yield Parameter Identification The yield criterion parameter identification was carried out for the constitutive models described in Sect. 2. In order to understand the models’ behaviour, three conditions were used to identify the anisotropy parameters: using only the r-values (Condition A); using the r-values and the initial yield stress (Condition B); and using the r-values and the average of the σα /σ0 values during deformation (0-34% true plastic strain) (Condition C). Table 1 shows the values used for the anisotropic model parameter identification.

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