Sökning: "Accelerated creep"
Visar resultat 1 - 5 av 12 avhandlingar innehållade orden Accelerated creep.
1. Micro-mechanical mechanisms for deformation in polymer-material structures
Sammanfattning : In this thesis, the focus has been on micro-mechanical mechanisms in polymer-based materials and structures. The first part of the thesis treats length-scale effects on polymer materials. Experiments have showed that the smaller the specimen, the stronger is the material. LÄS MER
2. Shrinkage and Related Properties of Alkali-Activated Binders Based on High MgO Blast Furnace Slag
Sammanfattning : Concrete is the second most used material in the world just after water. A drawback is that it is mostly based on Portland cement, which has an extremely high carbon footprint reaching a staggering 900 kg/tonne. The carbon dioxide emissions related to the production of the Portland cement accounts for nearly 8 % of the global total. LÄS MER
3. Development of New Multiscale Polymer Composites for Water Lubricated Tribological Contacts
Sammanfattning : Moving towards a Green Economy, there is a growing demand to use environmentally friendly tribological systems that has resulted in industries turning towards new mate-rials and water-based lubrication to satisfy their needs. Considering the low viscosity of water, tribological contacts lubricated with it are likely to operate in boundary/mixed lubrication regime for relatively long periods. LÄS MER
4. Micro-mechanically based modeling of mechano-sorptive creep in paper
Sammanfattning : The creep of paper is accelerated by moisture content changes. This acceleration is known as mechano-sorptive creep, which is also found in wood and some other materials. Mechano-sorptive creep has been known for several decades but it is still not well understood, and there is no generally accepted model explaining the effect. LÄS MER
5. Precipitation Reactions at High Temperatures in 9-12% Chromium Steels
Sammanfattning : This thesis reports on quantitative investigations of microstructural changes, mainly precipitation reactions, occurring during heat treatment, ageing and creep of 9-12% chromium steels. Several alloys with varying composition have been investigated. LÄS MER