Sökning: "compressive testing"
Visar resultat 1 - 5 av 54 avhandlingar innehållade orden compressive testing.
1. Time dependent material properties of shotcrete for hard rock tunnelling
Sammanfattning : In this thesis different mechanical properties for shotcrete (sprayed concrete) such as compression strength, bond strength, bending tensile strength, elastic modulus, free and restrained shrinkage as a function of its age was investigated. One of the main issues was to investigate the difference between ordinary cast concrete and shotcrete. LÄS MER
2. On matrix-driven failure in unidirectional NCF composites - A theoretical and experimental study
Sammanfattning : With ever increasing traffic levels, the civil aircraft industry is in constant need of new technologies to make air travel environmentally sustainable. One such technology is light materials to reduce the energy consumption in flight. LÄS MER
3. Aircraft composites and aeroelastic tailoring
Sammanfattning : This thesis treats various aspects of structural polymercomposites in aircraft applications. The mechanical performanceand quality of resin transfer molded (RTM) carbon fiberreinforced epoxy composites is studied. LÄS MER
4. Millimeter Wave Imaging and Phased Array Antennas for 5G and Aerospace Applications
Sammanfattning : Phased array antennas are cornerstones in many proposed antenna solutions concerning the next generation of both airborne radar systems and wireless communication systems (5G). Additionally, millimeter wave (mm-wave) frequencies are expected to play an integral role in 5G, and are deemed well-suited for inspecting structural components used in the aerospace industry. LÄS MER
5. Frictional studies and high strain rate testing of wood under refining conditions
Sammanfattning : When producing thermomechanical pulps (TMP), wood chips and fiber material are loaded mechanically in a disc-refiner to separate the fibers and to make them flexible. In the process, much of the energy supplied is transferred to the fiber material through cyclic compression, shear and friction processes. LÄS MER