Search for dissertations about: "Progressive failure"

Showing result 1 - 5 of 98 swedish dissertations containing the words Progressive failure.

2. 1. Methods for efficient modelling of progressive failure in laminated fibre-reinforced composites

   Author : Johannes Främby; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Composites; Progressive failure; Crash simulation; Adaptive modelling;

   Abstract : To meet increasing demands on reduced CO2 emissions, the automotive industry is currently very active in research to reduce vehicle weight by incorporating laminated composites (primarily carbon fibre-reinforced polymers) into structural components. Historically, composite materials have mainly been used in the aerospace industry, whereby CAE-based design and development tools for composite structures have been developed primarily to the specific needs and requirements in this industry. READ MORE

4. 2. Macroscale Modelling of 3D-Woven Composites: Inelasticity, Progressive Damage and Final Failure

   Author : Carolyn Oddy; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; 3D-woven composites; Anisotropy; Damage; Inelasticity; Phase-field; Failure;

   Abstract : Composites with 3D-woven reinforcement have been slowly making their way into different industrial applications. The interlacement of yarns, not only in-plane but also through-thickness, means that in many applications 3D-woven composites can outperform their laminated counterparts. READ MORE

5. 3. Simulation of the progressive failure of brittle rock

   Author : Upendra K. Singh; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mining and Rock Engineering; Gruv- och Berganläggningsteknik;

   Abstract : The anisotropic response of a brittle rock due to the formation of cracks under general applied loads has been taken as a continuous phenomenon on a suitable macroscopic scale. The response is described by a continuum field variable called the "damage vector". READ MORE

6. 4. Mechanics and Failure in Thin Material Layers : Towards Realistic Package Opening Simulations

   Author : Eskil Andreasson; Sharon Kao-Walter; Gabriella Bolzon; Blekinge Tekniska Högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; aluminium foil; FEM; LDPE; localisation; necking; polymer; progressive damage; semi-crystalline; simulation; virtual twin;

   Abstract : The final goal of this PhD-work is an efficient and user-friendly finite element modelling strategy targeting an industrial available package opening application.  In order to reach this goal, different experimental mechanical and fracture mechanical tests were continuously refined to characterize the studied materials. READ MORE

7. 5. Aspects of heart failure development and prevention in women

   Author : Anna-Karin Halldin; Göteborgs universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Women; Heart failure; Obesity; Physical activity; Population study; Risk factor; Prevention; Mental stress; Serum triglycerides; Serum cholesterol;

   Abstract : Heart failure (HF) is a severe progressive condition. Women more often are older and suffer from heart failure with preserved ejection fraction (HFpEF), contrasting to men who more often are younger and suffer from heart failure with reduced ejection fraction (HFrEF). READ MORE