Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 18 of 18 for “"Composite Processing"”.
-
In-situ Characterization and Machine Learning Applications for Composite Processing
… efficiency and overall performance. Autoclave composite processing offers a solution for the intricate design of complex structures. However, the rapid temperature and strain fluctuations experienced during the processing gives rise to a multitude of defects and residual stresses in the …
-
Fabrication methods and costs for thermoset and thermoplastic composite processing for aerospace applications
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1988.
-
High performance thermoplastic matrix composite processing: dry powder prepregging, plasma treatment, consolidation/crystallization analysis
… responsible for the birth and growth of the composites industry, is now responsible for the drive to produce composites which outperform those used today. A great deal of this interest lies in the use of thermoplastic polymers as the composite matrix. Thermoplastics offer the potential of …
-
In-situ Fiber Strength Distribution in NextelTM 610 Reinforced Aluminum Composites
MetPreg, a composite developed by Touchstone Research Laboratories (Tridelphia, WV), is an aluminum metal matrix composite reinforced by continuous NextelTM 610 alumina fibers. The question is, after processing, are the NextelTM fibers affected in any way that their strengthening contribution to …
-
The performance of nitinol shape memory alloy actuators embedded in thermoplastic composite material systems
… of material systems usually consisting of a composite or hybrid material system with fibrous or distributed actuators, various sensors and a control system. One type of actuator being developed for intelligent material systems is made of nitinol or shape memory alloy wire. In order for …
-
Heat Transfer and Consolidation Modeling of Fiber Tow in Fiber Placement
… heat transfer between heating tools and a composite towpreg in the automated fiber placement process. This dissertation suggests new heating techniques with liquid and rigid contact heat sources, and compares them with a widely used gas heat source for the fiber placement process. A thin …
-
Alpha-T-T and T-T-alpha-T diagrams in intelligent processing of thermosetting composites
The majority of existing models for processing in thermoset matrix composites concentrate nearly exclusively on heat and mass transfer problems and account for material-related aspects in a very simplified manner The objective of this work is to provide that missing element by proposing a clearly …
-
Fabrication And Damping Behavior Of Particulate BaTiO3 Ceramic Reinforced Copper Matrix Composites
Metal matrix composites offer unique opportunities for achieving multi-functionality in materials. In an attempt to investigate the possibility of enhancing damping characteristics of structural metals, copper was reinforced with tetragonal ferroelectric BaTiO3 particulates (Cu-BaTiO3 composites) …
-
Synthesis, Characterization and Properties of Vinyl Ester Matrix Resins
… matrix resins for thermosetting polymer composites. A major objective of this work has been to study the chemistry and kinetics of the cure reactions of vinyl ester resins at elevated curing temperatures, which are consistent with typical composite processing conditions. The crosslinking …
-
Data Intensive Method For Processing Defect Detection and Mitigation For Composites
<p>Composite manufacturing without processing defects is a crucial step in satisfying the production, performance, and quality requirements of composite materials in various industries. Autoclave processing enables manufacturing of high-quality composite parts with excellent mechanical properties, …
-
Self-sealing of thermal fatigue and mechanical damage in fiber-reinforced composite materials
Fiber reinforced composite tanks provide a promising method of storage for liquid oxygen and hydrogen for aerospace applications. The inherent thermal fatigue of these vessels leads to the formation of microcracks, which allow gas phase leakage across the tank walls. In this dissertation, …
-
The Influence of Fibre Processing and Treatments on Hemp Fibre/Epoxy and Hemp Fibre/PLA Composites
… polymer (both thermoset and thermoplastic) composites. The main objective of this study was to reinforce epoxy and polylactic acid (PLA) with hemp fibre to produce improved composites by optimising the fibre treatment methods, composite processing methods, and fibre/matrix interfacial …
-
Influences on nanocomposite structural performance: experimental study on materials processing and bonding
Nanocomposites have been widely reported to enhance performance in polymers, in both<br/>mechanical and physical properties. An increasing amount of research has resulted in many<br/>nanocomposite polymers being applied to various consumer products from motorcars to golf<br/>balls. Yet, at this …
-
Bioinspired microvascular self-healing in polymers and composites
… materials, particularly fiber-reinforced polymer composites, to recover fracture resistance over consecutive damage-heal cycles. A serendipitous outcome of the research is the ability to provide multi-functional properties such as active cooling, magnetic modulation, and electrical reconfiguration …
-
The development of sub-micro filler enhanced polymer composites
… silica flakes and graphite reinforced polymer composites have been developed in this research. The sub-micro polymer composites are designed to overcome problems associated with nanocomposite technology. Apart from the high cost of production, the other major problem in nanocomposites is …
-
Vacuum Assisted Resin Transfer Molding of Foam Sandwich Composite Materials: Process Development and Model Verification
… process being developed for the manufacture of composite structures. VARTM is being evaluated for the manufacture of primary aircraft structures, including foam sandwich composite materials. One of the benefits of VARTM is the ability to resin infiltrate large or complex shaped components. …
-
Vacuum-Assisted Resin Transfer Molding (VARTM) Model Development, Verification, and Process Analysis
… technologies in the manufacturing of primary composite structures in the aircraft industry as well as infrastructure. A great deal of work still needs to be done on efforts to reduce the costly trial-and-error methods of VARTM processing that are currently in practice today. A computer …
-
The processing and characterisation of recycled glass fibre composites
… recycling processes which leads to a lower composite performance when the recycled fibres are processed into composites. The main objective of this thesis was to develop composites based on thermally recycled glass fibres that can compete with as received fibre composites. Polypropylene (PP) …