Hovedoppgave. ved IMM. våren Prosjektoppgave ved IPM. Vår 2011

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1 Hovedoppgave ved IMM Vår 2011 Modellering og testing av fotprotese av Signe S. Stølen og Cecilie J. L. Kjellevold Sofia Hussain (PhD) arbeider med å utvikle en ny fotprotese for barn i u- land, noe som setter høye krav til lave kostnader og bruk av materialer. Vår oppgave er å modellere protesen, samt simulere og optimalisere med fokus på spenningsfordeling og materialvalg. Fysisk testing av materialer vil også bli gjort. Faglærer: Knut Aasland

2 Hovedoppgave ved IMM Våren 2011 Utvikling av Formula Student racerbil av Erling Kjelstrup Faglærer: Knut Einar Aasland Et team av studenter fra flere linjer og alle årstrinn skal utvikle og bygge Norges første bidrag til Formula Student. Prosjektet heter Revolve NTNU. Visjonen er å gjøre teori til praksis. Formula Student er en 30 år gammel mekanisk ingeniør konkurranse, Løpet Revolve ønsker å delta på er et av Europas største som holdes årlig i Silverstone i England.

3 Våren 2011 ANALYSIS OF UPHEAVAL BUCKLING OF SUBMARINE PIPELINES by Erica Marley Introduction: Subsea pipelines in operation are subject to large expansion forces due to high pressure and high temperature. These forces may cause the pipeline to buckle globally. A buried pipeline will naturally tend to buckle upwards, through its cover. Upheaval buckling is an important concern for pipeline integrity. The issue is complicated and it is one of the major design challenges in the pipeline industry today. Main objective: Develop a simplified expression for the uplift force in the soil cover that can be used for upheaval buckling design. RESULTS: Theoretical model of pipeline: v w P P x Required uplift resistance: w δ w EI 0 min = P w 0 Displacement (m) Methods: Develop a theoretical model of a buried pipeline Create a 3D finite element model for upheaval buckling analyses. Comparison of models: Contour of pipeline Length (m) FE-model Theoretical approach

4 Projectassignment Hovedoppgave ved at IMM Spring 2011 Alternative materials including surface treatments for a gas lift valve By Pål Zon Rafdal Problems associated with current solution; TFF Hard coating is difficult to machine resulting in scrapped parts and prolonged production time Inconel 718 is an expensive alloy and is demanding to machine Goals of the Project Analyse alternative materials and surface treatment technologies to see if cheaper and better solutions are available Challenges with PTC Gas Lift Valves PTC uses Inconel 718 to ensure maximum structural integrity and corrosion protection PTC uses a TFF hard surface coating to avoid erosion on the metal to metal seal surface area PTC provides V1 leak criteria (max leak rate 20ml/10 mins) with true metal to metal seals, V0 available ( max leak rate 0 ml/10 mins ), at 5ksi Exposed to harsh environments containing CO2, H2S, corrosive chemicals Large volumes of gas at high velocities causing erosion on the valve seat area Adhesive wear when the valve opens and closes Oilfield operators are sceptical to new unproven solutions Lifetime of the valve is essential Supervisor: Roy Johnsen

5 Hovedoppgave ved IMM Vår 2011 Modellering og testing av fotprotese av Signe S. Stølen og Cecilie J. L. Kjellevold Sofia Hussain (PhD) arbeider med å utvikle en ny fotprotese for barn i u- land, noe som setter høye krav til lave kostnader og bruk av materialer. Vår oppgave er å modellere protesen, samt simulere og optimalisere med fokus på spenningsfordeling og materialvalg. Fysisk testing av materialer vil også bli gjort. Faglærer: Knut Aasland

6 Project at Hovedoppgave ved IMM Spring 2011 Adhesion of metal composite joints European Co-Patch project by Nina Thorvaldsen Co-Patch is a collaboration between 15 different organizations, universities and companies in Europe on composite patch repair for marine and civil engineering infrastructure application. This method is a promising way to decrease the stress in the area of the crack tip on a steel structure, for example steel ships, bridges and transmission towers. The aim is to find the best adhesive strength, overlap length, and the best surface treatment of the metal. It will be different tests to come down from five to two surface treatments, and to find the best adhesive. DCB and ENF will be carried out to find fracture mechanics properties. Different overlap lengths will be tested. FE analysis in Abaqus will be carried out to compare results. Picture from: Supervisor: Andreas Echtermeyer Adhesive layer with different overlap length