Sökning: "Material yield"

Visar resultat 16 - 20 av 593 avhandlingar innehållade orden Material yield.

  1. 16. Modelling of high strain rate plasticity and metal cutting

    Författare :Dan Wedberg; Jesper Hattel; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Material Mechanics; Materialmekanik;

    Sammanfattning : Metal cutting is one of the most frequently used forming processes in the manufacturing industry. Extensive effort is made to improve its process and simulation has become an integrated part, not only in the product development process but also in the customer relations. LÄS MER

  3. 17. Modelling and simulation of the roll forming process

    Författare :Michael Lindgren; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Material Mechanics; Materialmekanik;

    Sammanfattning : One of the first decisions to make when a new roll forming line is designed is the number of forming steps needed to produce a profile. This is dependent on the material properties, the cross-section geometry and the tolerance requirements. LÄS MER

  4. 18. Experimental and computational investigation of the roll forming process

    Författare :Michael Lindgren; J Huetink; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Material Mechanics; Materialmekanik;

    Sammanfattning : One of the first questions to consider when designing a new roll forming line is the number of forming steps required to produce a profile. The number depends on material properties, the cross-section geometry and tolerance requirements, but the tool designer also wants to minimize the number of forming steps in order to reduce the investment costs for the customer. LÄS MER

  5. 19. Modelling of Bulk Metallic Glass formation in Powder Bed Fusion

    Författare :Johan Lindwall; Andreas Lundbäck; Mattias Unosson; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Material Mechanics; Materialmekanik;

    Sammanfattning : This thesis discusses a model for simulation of the Powder Bed Fusion (PBF) process of metallic powder with the capability to become amorphous. The temperature field in the PBF process is predicted by a three-dimensional thermal finite element model in three dimensions using a layer-by-layer approach, meaning that the scanning strategy of the moving laser spot is consolidated into a single heat source acting on the entire layer momentarily. LÄS MER

  7. 20. Modelling of Inelastic Effects in Metal Sheets and Identification of Material Parameters

    Författare :Edin Omerspahic; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; plasticity; viscoplasticity; MCR mechanism; constitutive modelling; mixed hardening; damage; dynamic yield surface; material parameter identification;

    Sammanfattning : The continuum modelling of the macroscopic behaviour of metallic sheets and the identification of corresponding material parameters for models selected are dealt with in the thesis. Thermodynamics with internal variables provides a framework for the derivation of the models. LÄS MER