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Showing 1 to 20 of 318 for “"composite material"”.
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Economics of composite material manufacturing equipment
Composite materials are used for products needing high strength-to-weight ratios and good corrosion resistance. For these materials, various composite manufacturing processes have been developed such as Automated Tow Placement, Braiding, Diaphragm Forming, Resin Transfer Molding, Pultrusion, …
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Shape changing composite material design for interactions
This thesis is about designing shape change composite material for interactions. Interaction has gone beyond computer screens and electronics to enter the realm of physical materials. Shape changes at the micro level will cause shape changes and other physical property changes at the macro level. A …
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Fatigue Microcracking of Composite Material IM7/977-2
The application of an ultralight linerless composite fuel tank to a man-rated, reusable launch vehicle requires greater understanding of the micro-fracture behavior which can lead to propellant permeation through the tank wall. Transverse matrix cracks in unidirectional wound, or placed, plies can …
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A study on cork-based plastic composite material
… freedom and high environmental burdens of core material in sandwich panels such as fiberglass, and chemically synthesized foams have retarded a wide use in various areas. Recently it has been suggested that the better performance and economic, environmental benefits could be possibly achieved by …
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Mechanical behavior of a ceramic matrix composite material
Monolithic ceramic materials have been used in industry for hundreds of years. These materials have proven their usefulness in many applications, yet, their potential for critical structural applications is limited. The existence of an imperfection in a monolithic ceramic on the order of several …
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Development and analysis of aluminum-PTFE reactive composite material
… to aluminum. Aluminum Teflon based energetic material see great potential for use in pyrotechnics, propellants and even explosives. A composite with composition Al-PTFE (90-10 wt. %) is prepared through Cryomilling and is shown to be a better method of preparation as compared to room …
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Characterization and Performance of a Self -Healing Composite Material
… of delamination damage in woven reinforced epoxy composites is performed. Three types of healing process are studied. In the first, a catalyzed monomer is manually injected into the delamination. In the second, a self-activated material is created by embedding the catalyst directly into the matrix …
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Study of Wave Propagation in Damaged Composite Material Laminates
The characteristics of carbon fiber composites have enabled these materials to be accepted as replacements for metal parts in industry. However, due to their unsymmetrical material properties, carbon fiber composites are susceptible to damage, such as a delamination, which can cause premature …
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Pulsed-Laser Ultrasound Generation in Fiber-Reinforced Composite Material
… stimulating ultrasonic waves in fiber-reinforced composite materials is the subject of investigation. For convenience, the material is chosen to be homogeneous transversely isotropic. The study is strictly limited to the laser power regimes that are suitable for nondestructive evaluation. An …
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An investigation of shear response of composite material systems
An investigation of shear response for various composite material systems is presented. The uniformity of the strain fields is studied experimentally and numerically for different specimen configurations. Conventional strain gage measurements and the moiré interferometry technique are employed to …
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The Effects of Carbon Fiber Misalignment on Composite Material Strength
… (NDE) is an effective way for determining material properties. More specifically, ultrasonic waves along with visual measurements from a microscope can be used to systematically determine the elastic modulus of single ply composites that are subject to an altered manufacturing process. In …
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Development of an eco-friendly composite material for engineering applications
… eco-friendly and more sustainable construction materials. The use of recycled materials and agriculture waste in construction is among the most attractive options because of the increasing need of the construction industry for these materials, their relatively low quality requirements and the …
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Fracture and Fatigue of a Self -Healing Polymer Composite Material
… The inherent fatigue characteristics of the material are measured. A fatigue-life-extension-based protocol is established for characterizing self-healing under a cyclic loading. Retardation and arrest of the fatigue crack result from self-healing induced crack-tip shielding mechanisms and …
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Nondestructive evaluation of a high temperature ceramic matrix composite material
… a 2-D Nicalon-reinforced, CVI-SiC matrix composite before and after exposure to 1000, 1200, and 1400 °C in oxidizing atmospheres of air. Concurrently, the nondestructive testing methods used to detect thermally induced changes in the SiC/SiC composite were evaluated. All of the NDT …
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Impact damage evaluation of high performance polymeric composite material systems
… as a basis for comparative analysis of new materials. Experimental results are presented for six different laminated fiber reinforced composite material systems under investigation at Virginia Tech. A drop weight tower was used to perform impact tests with testing conditions equivalent to …
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Impact damage resistance and tolerance of advanced composite material systems
… presented for nine laminated fiber reinforced composite material systems. The experiments employ a small scale specimen for assessing the impact damage resistance and impact damage tolerance of these materials. The damage area detected by C-scan is observed to develop linearly with the impact …
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A Composite Material-based Computational Model for Diaphragm Muscle Biomechanical Simulation
Lung cancer is the most common cause of cancer related death among both men and women. Radiation therapy is the most widely used treatment for this disease. Motion compensation for tumor movement is often clinically important and biomechanics-based motion models may provide the most robust method …
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Surrogate-based global optimization of composite material parts under dynamic loading
The design optimization of laminated composite structures is of relevance in automobile, naval, aerospace, construction and energy industry. While several optimization methods have been applied in the design of laminated composites, the majority of those methods are only applicable to linear or …
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Combustion synthesis of engineered porous B₄C-Al₂O₃ composite material
Includes bibliographical references (pages 158-161).
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