The global use of energy increases every day and to meet the growing demand, energy sources are constantly being developed to become more efficient and reliable. During the last decade, the global solar photovoltaics (PV) capacity has increased every year and in 2017, solar PV was the global leading power source of renewable energy. However, hazard...
This thesis is about determining the risks of positioning swimming pools on top of high-rise buildings.Pursuing this determination, computational simulations of constructed structural models in a finiteelement model software called RFEM have been analyzed. In further pursuit of wanted results comingfrom the computational software, the models have a...
Producing nearer to net-shape hot rolled rings whilst meeting demanding product property requirements is a major industrial challenge, especially in high value materials such as Nickel-based superalloys. Recent process innovations propose additional tooling to improve control over the geometric accuracy, but it is not known what influence this will...
This work has been done in collaboration with Northpower Stålhallar AB. The work is concentrating on column buckling, wind load and deflection of steel columns made of VKR profiles. VKR profiles are steel profiles that are hot-rolled structural pipes having a rectangular section. The analysis is made according to Eurokod 3 and with the finite eleme...
In Sweden, buildings are not designed to withstand earthquakes due to the rarity of an earthquake event and its consequential damage. However, the aim of this thesis was to study the seismic performance of some of the highest buildings in Stockholm, called Innovationen and Helix. The purpose of the study was to get an understanding of earthquake en...
Wind turbine blades are highly complex structures with complex 3 dimensional forms governed by their aerodynamics that allow a maximum of power output and efficiency. On the structural side there is always an immense interest in keeping the blades as light and as rigid as possible. No structure being perfectly rigid, the wind turbine blades are spe...
Published in International Journal of Precision Engineering and Manufacturing
Carbon-fiber-reinforced plastic (CFRP), which is strong and lightweight, is used in fabricating composites for a number of applications such as aircraft, transportation, and machinery. Automotive roof panels composed of CFRP require high strength and bending stiffness to ensure driver safety during rollover. Generally, the mechanical properties of ...
Published in International Journal of Precision Engineering and Manufacturing
Recently, there is an increasing commercial interest in manufacturing rings with a complicated cross-sectional shape directly by a metal forming process instead of by machining. Profile ring rolling is one of the advanced metal forming technologies to manufacture large or small seamless profile rings. Compared with plain ring rolling, profile ring ...
Published in Journal of Mechanical Science and Technology
The cracking of enamel coating often occurs because of excessive tensile stress under the product usage environment. The cracks loosen the enamel coating, leading to spalling and peeling and subsequent corrosion of the metal substrate. The cracking is also affected by the residual stress, which complicates the prediction of cracking initiation. The...
In this paper, the finite element analysis for the design of a high speed forming press using electromagnetic pulse force has been performed. The punch of the press has been fixed on a aluminium plate, which is driven by the electromagnetic pulse force. The force is the repulsive force between aluminium plate and the coil. The coil has been supplie...
