Sökning: "Fracture morphology"

Visar resultat 1 - 5 av 45 avhandlingar innehållade orden Fracture morphology.

1. 1. Development of a Morphology-based Analysis Framework for Asphalt Pavements

   Författare :Ibrahim Onifade; Björn Birgisson; Nicole Kringos; Denis Jelagin; William G. Buttlar; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Morphology; damage; X-ray computed tomography; top-down cracking; fracture; Morfologi; skador; röntgendatortomografi; ’top-down’sprickbildning; fraktur; Byggvetenskap; Civil and Architectural Engineering; Teknisk materialvetenskap; Materials Science and Engineering;

   Sammanfattning : The morphology of asphalt mixtures plays a vital role in their properties and behaviour. The work in this thesis is aimed at developing a fundamental understanding of the effect of the asphalt morphology on the strength properties and deformation mechanisms for development of morphology-based analysis framework for long-term response prediction. LÄS MER

3. 2. Distal femur fracture in the elderly patient

   Författare :Martin Paulsson; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Distal femur fracture; Geriatric patients; Weight-bearing; Recovery; Secondary displacement; Minimally invasive plate osteosynthesis MIPO ; Fracture alignment; Fracture classification;

   Sammanfattning : Studies on the epidemiology of distal femur fractures show a vast increase in low-energy trauma-associated fractures in older ages. Age-related changes in bones lead to loss of bone matrix and increased porosity, which entails an increased risk for fractures and different fracture patterns than in younger individuals. LÄS MER

4. 3. Functional Properties and Morphology of Recycled Post-consumer WEEE Thermoplastic Blends

   Författare :Erik Stenvall; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; morphology; melt-blending; compatibilisation; extrusion; SEBS; WEEE; physical ageing; TOF-SIMS; co-continuous; chemical degradation; plastics recycling;

   Sammanfattning : This work concerns a waste electrical and electronic equipment blend of recycled plastics (WEEEBR), reprocessed from a low density thermoplastics batch (600 kg) by removal of non-thermoplastic contamination (1.2 weight % (wt%)). LÄS MER

5. 4. The effect of scale on the morphology, mechanics and transmissivity of single rock fractures

   Författare :Nader Fardin; KTH; []
   Nyckelord :Anisotropy; Aperture; Asperity degradation; Contact area; Finite Element Method FEM ; Flow analysis; Fractals; Fracture morphology; Heterogeneity; Stress-deformation; Surface roughness; Roughness-Length method; Scale dependency; Stationarity; Transm;

   Sammanfattning : This thesis investigates the effect of scale on themorphology, mechanics and transmissivity of single rockfractures using both laboratory and in-situ experiments, aswell as numerical simulations. Using a laboratory 3D laserscanner, the surface topography of a large silicon-rubberfracture replica of size 1m x 1m, as well as the topography ofboth surfaces of several high-strength concrete fracturereplicas varying in size from 50mmx50mm to 200mm x 200mm, werescanned. LÄS MER

7. 5. Thermally Induced Fracture Performance of Asphalt Mixtures

   Författare :Prabir Kumar Das; Björn Birgisson; Dallas Little; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Low temperature cracking; asphalt concrete fracture mechanics; viscoelasticity; non-linear thermal contraction coefficient; atomic force microscopy; wax; wax crystallization; SRA - Transport; SRA - Transport;

   Sammanfattning : A major distress mode in asphalt pavements is low temperature cracking, which results from the contraction and expansion of the asphalt pavement under extreme temperature changes. The potential for low temperature cracking is an interplay between the environment, the road structure and importantly the properties of the asphalt mixture. LÄS MER