Bruchanalyse an Hohlgläsern

Failure analysis of hollow glasses The failure analysis is very important to clarify damages of hollow glasses. Damages of glass bottle through over pressure are very often linked with damages to persons. This is the reason why the causal research is from particular importance. Different surface characteristics of glass fragments as well as the fracture pattern give hints to the direction of the crack, the stress just before breakage and the reason of stress. A reconstruction of the bottle is a further helpful instrument for cause studies. The difference of the various characteristics of the surface will be explained. Further on there will be discussed different reasons and mechanism of fracture.     

Mikroreaktoren aus Glas für die Anwendung im Labor

The implementation of microreaction technology as part of academic research und hands‐on trainings requires economic und manageable microstructured devices. Glass microdevices are an alternative to round bottom flasks in chemical synthesis. Integration in existing systems is provided by use of standardized adapter.     

Investigation of impact characteristics of tempered vehicle and vessel glasses

Glass is widely used at various engineering applications, especially in vehicle and vessel industry due to the reasons such as transparency, hardness at the room temperature and its strength against impact. One of the processes to be applied to glass is tempering. This process is applied to glass with the aim of providing 2–5 times more impact resistance. Additionally, if tempered glass is fractured it goes to pieces without sharp edges. These pieces are too small to injure people around them. Thus, nowadays side and rear glasses of vehicles and vessels are tempered glasses. In this study, tempered and untempered vehicle glasses were tested by using Instron Dynatup 9250 HV Impact Apparatus in the Mechanical Engineering Department of Pamukkale University, impact was applied to 145 samples with an average of 5.3 (771) times and their impact strength values were determined. In the first stage of this study, magnitudes of impact energies causing damages at tempered and untempered vehicle and vessel glasses with a thickness of 4 mm and 6 mm at +20 °C, were determined. In the second stage, impact experiments were performed at the environment temperatures of –20 °C and +40 °C apart from the room temperature, because the glasses to be produced will be used in different climate zones. In this way, a useful source of knowledge, especially for developing tempered vehicle and vessel glasses, will be constituted by determining the impact strength characteristics of these glasses.     

Fused glass deposition modelling for applications in the built environment

For the built environment and for engineers, glass is an indispensable material with unique properties. Recent developments have shown that there is a potential market for additive manufacturing technology in the building industry, based on the production with a relatively small amount of repetitions and the tendency of applying technological innovations for advanced buildings. This paper focusses on the potential of fusing glass filaments on a glass base plate in order to develop a scientific base to create a process that is able to print 3D glass on glass plates for applications in the building industry. These fused components could eliminate boreholes for joints in glass panes including related disadvantages. Also, the fused deposition glass components can be a potential reinforcement of flat glass. Therefore, the fusing of soda lime silicate glass and borosilicate glass has been investigated. Based on these experiences, samples with different glass thicknesses are manufactured and the fused components are tested for their bending strength. The manufactured samples are analysed with polarized images, 3D computer tomography, microscopy and energy dispersive X‐ray spectroscopy. This paper describes, presents and discusses the results of the investigations, and demonstrates that load transfer via fused glass joints is possible in principle.