Search for dissertations about: "Andrejs Pupurs"
Found 3 swedish dissertations containing the words Andrejs Pupurs.
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1. Fracture mechanics analysis of damage initiation and evolution in fiber reinforced composites
Abstract : When a unidirectional (UD) fiber reinforced polymer composite is loaded in fiber direction in quasi-static or in a high stress cyclic tension-tension regime, many fiber breaks may occur in random positions already during the load increase in the first cycle. This is because fiber strain to failure in UD composites is lower than the polymer matrix strain to failure. READ MORE
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2. Micro-crack initiation and propagation in fiber reinforced composites
Abstract : Predicting micro-damage initiation and evolution is one of the key challenges for safe design of fiber reinforced polymer composites. Micro-scale damage such as, for example, single fiber break may be unnoticeable and negligible during the initial service life of composite, however, with many loading and unloading cycles this initially micro-scale damage may propagate forming macroscopic scale cracks that can significantly reduce the service lifetime or even lead to unforeseen catastrophic failure of the composite structure. READ MORE
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3. Structural Composite Lithium-Ion Battery : Effect of Intercalation induced volumetric changes on micro-damage
Abstract : The quest for lighter materials and structures to reduce climate impacts in the automotive industry has paved the way for multifunctional solutions. Mass saving on a system level can be achieved by materials or structures having more than one primary function, thus reducing the number of components used. READ MORE
