Sökning: "Forming Limit Diagram"

Hittade 4 avhandlingar innehållade orden Forming Limit Diagram.

1. 1. Aspects on finite element simulation of sheet metal forming processes

   Författare :Ramin Moshfegh; Kjell Mattiasson; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Sheet metal forming process; Forming Limit Diagram; Metallurgical manufacturing engineering; Metallurgisk produktionsteknik;

   Sammanfattning : This thesis has focused on four different aspects of finite element simulation of sheet metal forming processes. Four substantial research areas are the development of a methodology for predicting the limiting strains in connection with the Forming Limit Diagram, the applicable mode of procedure for finite element simulation of the hydromechanical deep drawing process, the adaptive mesh refinement strategy based on gradients of the effective plastic stresses and strains; and the reliability and sensitivity assessments within sheet metal forming processes. LÄS MER

3. 2. Simulation of bending and hydroforming : constitutive modeling and failure prediction

   Författare :Mikael Jansson; Linköpings universitet; []
   Nyckelord :hydroforming; anisotropy; aluminium; finite element simulation; forming limits;

   Sammanfattning : In recent years, the automotive industry has shown increased interest in reducing weight and improving environmental effects of cars. This has lead to an increased use of lightweight parts. LÄS MER

4. 3. Lactic acid production: extractive fermentation in aqueous two-phase systems

   Författare :Jordi Planes; Teknisk mikrobiologi; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; gel excludion chromatography; polyethylenimine; ethylene oxide propylene oxide; phase forming polymers; aqueous two-phase systems; extractive fermentation; Lactococcus; Lactobacillus; Mikrobiologi; bakteriologi; virologi; mykologi; bacteriology; virology; mycology; Microbiology;

   Sammanfattning : There is an increased interest in the microbial production of lactic acid as a raw material for the synthesis of lactic acid polymers as biodegradable plastics. However, two factors limit the economical competitiveness of lactic acid production by microorganisms: lactic acid inhibition, which decreases both fermentation rate and the maximum lactic acid concentration, and the efficiency in the recovery of lactic acid. LÄS MER

5. 4. Deformation characteristics of stainless steels

   Författare :Roger Andersson; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Manufacturing Systems Engineering; Produktionsutveckling;

   Sammanfattning : This thesis describes the results of a theoretical and experimental investigation into the deformation characteristics of stainless steels. The title of the chapters is as follows; A new type of forming limit diagram for use with meta-stable stainless steels. LÄS MER