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Multiscale damage modeling of advanced composite materials
The use of composite materials has spread over the years throughout the engineering areas of structures. The technological progress in this field has recently expanded, resulting in the design of new composite configurations, including multilayered composite materials and multifunctional nanostructured materials. Even though traditional and emerging composite materials offer wide potentialities for engineering, a significant challenge is still open with respect to damage phenomena. Driven by safety requirements and cost-effective optimization needs, damage modeling has gained a fundamental role for composite engineering. It represents a strong motivation to support design procedures by means of numerical methods, such as finite element analyses. Recently, multiscale computational analyses effectively gained a major role within the challenging task of damage prediction. Particularly, by bridging physical phenomena occurring at different scales, i.e. macro, meso, micro and even nano, damage evolution can be accurately predicted. The present work is collocated within this scenario with the aim of exploring and addressing different critical issues related to the failure mechanisms acting at different length scales of different composite systems. The multiscale procedures, proposed to evaluate the damage behavior of such materials, involved experimental, analytical and numerical tools. In detail, damage modeling has been performed for different case studies: i) GFRP composite laminates, ii) phenolic impregnated skins/honeycomb Nomex core sandwich structures, iii) Carbon Nanotube/Nanofiber modified S2-Glass/epoxy composites. For the case study i), the activity concerned the damage occurred in case of low-velocity impact tests, carried out on glass fabric/epoxy laminates. In this case, the multiscale modeling was implemented to account for both intralaminar and interlaminar levels of damage occurring within the composite laminate. This allowed to characterize the critical parameters acting at the smaller (interlaminar) ...
Multiscale damage modeling of advanced composite materials
The use of composite materials has spread over the years throughout the engineering areas of structures. The technological progress in this field has recently expanded, resulting in the design of new composite configurations, including multilayered composite materials and multifunctional nanostructured materials. Even though traditional and emerging composite materials offer wide potentialities for engineering, a significant challenge is still open with respect to damage phenomena. Driven by safety requirements and cost-effective optimization needs, damage modeling has gained a fundamental role for composite engineering. It represents a strong motivation to support design procedures by means of numerical methods, such as finite element analyses. Recently, multiscale computational analyses effectively gained a major role within the challenging task of damage prediction. Particularly, by bridging physical phenomena occurring at different scales, i.e. macro, meso, micro and even nano, damage evolution can be accurately predicted. The present work is collocated within this scenario with the aim of exploring and addressing different critical issues related to the failure mechanisms acting at different length scales of different composite systems. The multiscale procedures, proposed to evaluate the damage behavior of such materials, involved experimental, analytical and numerical tools. In detail, damage modeling has been performed for different case studies: i) GFRP composite laminates, ii) phenolic impregnated skins/honeycomb Nomex core sandwich structures, iii) Carbon Nanotube/Nanofiber modified S2-Glass/epoxy composites. For the case study i), the activity concerned the damage occurred in case of low-velocity impact tests, carried out on glass fabric/epoxy laminates. In this case, the multiscale modeling was implemented to account for both intralaminar and interlaminar levels of damage occurring within the composite laminate. This allowed to characterize the critical parameters acting at the smaller (interlaminar) ...
Multiscale damage modeling of advanced composite materials
Menna, Costantino (Autor:in)
02.04.2013
Menna, Costantino (2013) Multiscale damage modeling of advanced composite materials. [Tesi di dottorato]
Hochschulschrift
Elektronische Ressource
Italienisch , Englisch
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