General Dynamics

About: General Dynamics is a company organization based out in Fairfax, Virginia, United States. It is known for research contribution in the topics: Signal & Propellant. The organization has 5722 authors who have published 5819 publications receiving 85768 citations. The organization is also known as: GD & General Dynamics Corporation.

Packaging and dispensing kit

Abstract: An apparatus for storing and dispensing a plurality of disparate, reactible fluid materials in a relatively viscous state in separate storage locations including means for dispensing the fluid through separate, easily removable needles. A plurality of closely adjacent cylinders have distinct and separate interiors with nozzles formed at one end. Separate removable needles have sealed locking arrangements for attachment to the nozzles. Different designs and structures of the needles are given so that the fluids can be mixed together, joined together or kept separate until injected through needle point openings. Structure is provided for disproportionately mixing the separately contained materials according to the desired mix. Preferably, the dispensing cylinders are formed of transparent material having graduated measuring marks on the liquid-containing portions. The entire apparatus may be constructed of inexpensive materials, such as plastic, the apparatus being intended for disposal after the fluid liquids prepackaged therein have been dispensed.

Passive Seismic Experiment

Abstract: Seismometer operation for 21 days at Tranquillity Base revealed, among strong signals produced by the Apollo 11 lunar module descent stage, a small proportion of probable natural seismic signals. The latter are long-duration, emergent oscillations which lack the discrete phases and coherence of earthquake signals. From similarity with the impact signal of the Apollo 12 ascent stage, they are thought to be produced by meteoroid impacts or shallow moonquakes. This signal character may imply transmission with high Q and intense wave scattering, conditions which are mutually exclusive on earth. Natural background noise is very much smaller than on earth, and lunar tectonism may be very low.

An Investigation of Cumulative Damage Development in Quasi-Isotropic Graphite/Epoxy Laminates

Abstract: Results of an experimental investigation of cumulative damage development in two unnotched quasi-isotropic graphite/epoxy laminates subjected to quasi-static tension and tension-tension fatigue are presented. Damage development in the form of transverse cracking in all off-axis laminae, longitudinal cracking, and delamination was monitored via the surface replication technique. Results of the study include a detailed description of the chronology of damage development prior to failure. Evidence also is presented in support of a damage model based on the concept of a characteristic damage state.