Search for dissertations about: "damage identification"

Showing result 1 - 5 of 126 swedish dissertations containing the words damage identification.

2. 1. Damage Tolerance of Impacted Composite Sandwich Structures

   Author : Moeen ud din Saeed Rajput; Malin Åkermo; Stefan Hallström; Magnus Burman; Christian Berggreen; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; composite sandwich; cellular; polymer; material characterization; modulus; non-crimp fabric; low velocity impact; vibration; uncertainty analysis; drop-weight impact; fractography; barely visible impact damage; X-ray microtomography; compression-after-impact; bending-after-impact; high speed image processing; damage resistance; damage tolerance; Aerospace Engineering; Flyg- och rymdteknik;

   Abstract : This thesis deals with damage tolerance of impacted sandwich structures for load bearing applications. Composite sandwich structures find wide application as lightweight solutions in aerospace components, since weight reduction and less fuel emissions are primary concerns for aircraft manufactures. READ MORE

4. 2. Modelling of Inelastic Effects in Metal Sheets and Identification of Material Parameters

   Author : Edin Omerspahic; Chalmers tekniska högskola; []
   Keywords : 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;

   Abstract : 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. READ MORE

5. 3. FE-Simulation of Metal Cutting Processes

   Author : Ahmet Semih Ertürk; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Metal cutting; Ductile fracture; Gradient damage; Finite element method; Turning; Machining; Inverse identification;

   Abstract : This thesis deals with the finite element (FE) simulation of machining processes. Realistic simulation of metal cutting processes enables a more resource-efficient machinability assessment for a given material in terms of cutting forces, chip shape and tool wear at different ranges of cutting conditions. READ MORE

6. 4. On the multiscale modeling of duplex stainless steel

   Author : Robert Lillbacka; RISE; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; duplex stainless steel; crystal plasticity; damage; Concurrent multiscale modeling; calibration;

   Abstract : This thesis deals with the modeling and simulation ofthe influence of the material substructure on the macroscopicmechanical properties of duplex stainless steel (DSS). Twosubscale levels and their interaction are considered: Grainstructure (mesoscale) and crystallographic structure (microscale). READ MORE

7. 5. Infants with urinary tract infection - renal damage and risk factors

   Author : Iulian Preda; Göteborgs universitet; []
   Keywords : infants; renal damage; urinary tract infection; imaging;

   Abstract : Background Identification of infants with urinary tract infection (UTI) who are at risk of renal scarring is an important clinical challenge with considerable economic consequences. Few issues in pediatric practice today have been so debated as the appropriate investigation of an infant with UTI. READ MORE