摘要:
A matrix resin composition for fiber reinforced composite materials is described. The resin is thermosetting and achieves a glass transition temperature of at least 177° C. (Tg), obtained by curing under anaerobic conditions at room temperature. The matrix resin will streamline composite fabrication processes by eliminating the need for heating during the cure process. The implications of this development are significant in terms of the ease of use and elimination of procedural steps. While the resin system was developed specifically for vacuum bagging, it is expected to be viable for other composite fabrication methods including resin transfer molding (RTM) and vacuum-assisted resin transfer molding (VARTM). The resin system is viable for use with carbon fiber reinforcements to fabricate laminates at least 0.20 inches thick. The resulting laminates have low porosity and mechanical properties equivalent to those prepared with common epoxy matrix resins.
摘要:
A matrix resin composition for fiber reinforced composite materials is described. The resin is thermosetting and achieves a glass transition temperature of at least 177° C. (Tg), obtained by curing under anaerobic conditions at room temperature. The matrix resin will streamline composite fabrication processes by eliminating the need for heating during the cure process. The implications of this development are significant in terms of the ease of use and elimination of procedural steps. While the resin system was developed specifically for vacuum bagging, it is expected to be viable for other composite fabrication methods including resin transfer molding (RTM) and vacuum-assisted resin transfer molding (VARTM). The resin system is viable for use with carbon fiber reinforcements to fabricate laminates at least 0.20 inches thick. The resulting laminintes have low porosity and mechanical properties equivalent to those prepared with common epoxy matrix resins.
摘要:
A projectile cartridge for a hybrid capillary variable velocity electric launcher comprising a launcher and breech/barrel assembly as well as a projectile and a pulsed power supply for supplying adjustable amounts of electric energy to permit variable projectile velocity. The projectile cartridge also includes at least an anode and cathode section, a fuse wire, a capillary liner, and the projectile, which may include both a slug and a sabot jacket. A hybridization medium is included with restraining mechanisms.
摘要:
An ultraviolet (UV) light curable formulation useful for repairing composite materials, comprising: an acrylic oligomer, an acrylic monomer, and a photoinitiator. This formulation may include fiberglass. The photoinitiator can be a combination of a bis-acylphosphine oxide and an alpha hydroxy ketone. The formulation can cure rapidly, such as in about 20 minutes. The cured formulation can have a Tg above 150null C.
摘要:
A continuous mode conveyor cooking appliance utilizing hot air jet impingement and microwave energy for cooking prepared foods. The approach envisions a central microwave unit with a hot air jet impingement oven unit on each side of the microwave section and a conveyor system to carry the food items completely through the appliance from one end to the other and with the two hot air jet impingement ovens equipped with a designed combination of hot air jet impingement jets and solid pins to act as a microwave attenuation system to reduce microwave exposure to cooking personnel to completely safe levels.
摘要:
Non-destructive sensing methods and devices for inspection and measuring in manufacturing applications for removal of contaminants from composite surfaces coupled with sensing and activation of the composite surfaces.
摘要:
A low-cost ultrasonic system and method that can be used during powder based fusion additive manufacturing to control the microstructural features of parts built in a metallic system. The system and method include the application of laser acoustic emission technology to monitor the metallic microstructure during a build. The system and method can be built into or added onto existing laser-based powder based fusion additive manufacturing machines.
摘要:
A tire deformation sensing and tire inflation system for tires that makes use of ultrasonic sensors embedded in the bead lock of the tire to measure time intervals between transmitted ultrasonic signals and the echo received signals to and uses the information obtained to adjust the tire pressure through a central tire inflation system.
摘要:
The use of nondestructive inspection (NDI) capabilities for the detection of fatigue cracks extending from fastener holes in multi-layered metallic structures without removing the fastener; including at least the use of a probe guide containing a UT sensor and either an inertial measurement unit (IMU) or a rotary encoder, and either of these options could be applied in testing of either raised head fasteners or flush fasteners.