Sökning: "Polymera konstruktionsmaterial"
Visar resultat 21 - 25 av 75 avhandlingar innehållade orden Polymera konstruktionsmaterial.
21. Tensile failure of random fibre composites : a statistical approach
Sammanfattning : .... LÄS MER
22. Damage evolution in laminates with manufacturing defects
Sammanfattning : In this thesis, experimental investigations and theoretical studies on the stochastic matrix cracking evolution under static loading in composite laminates with manufacturing defects are presented. The presented work demonstrates a methodology that accounts for the statistically distributed defects in damage mechanics models for the assessment of the integrity of composites and for the structural design of composites. LÄS MER
23. Mechanics of composites with fiber bundle meso-structure
Sammanfattning : The presented thesis analyze mechanical phenomena in fibrous composites with fiber bundle sub-structure (woven composite sheet molding compounds (SMC) etc.). This sub-structure defines an intermediate meso-scale between the scale of individual fibers and macro-scale of the composite. LÄS MER
24. Micromechanics approach to stiffness characterization of woven composites
Sammanfattning : Thesis consider the stiffness of woven composites, methods of its calculation and stiffness reduction due to damage accumulation during the service. First, reliable methods for stiffness calculation of undamaged woven composites are considered. There are a large amount of simple approximate methods available in literature. LÄS MER
25. Damage accumulation and stiffness degradation in composite laminates
Sammanfattning : In the presented thesis analytical modeling of elastic properties degradation and modeling of damage evolution in composite laminates is performed. Transverse cracking initiation on a fiber/matrix level is briefly studied by testing model composites and cross-ply laminates. LÄS MER