Elongation determination using finite element and boundary element method

This paper presents an application of the finite element method and boundary element method to determine the distribution of the elongation. Computer simulations were performed using the computation of numerical algorithms according to a mathematical structure of the model and taking into account the values of all other elements of the fiber Bragg grating (FBG) sensor. Experimental studies were confirmed by elongation measurement system using one uniform FBG

ANALISIS DE LAS PROPIEDADES MECÁNICAS DE UN ACERO ESTRUCTURAL A - 36 QUE PRESENTA FASES DOBLES

EL ACERO ESTRUCTURA DEL ACERO MICROESTRUCTURA DEL ACERO DIAGRAMA DE HIERRO CARBONO ( FE – C ) FERRITA ? FERRITA ? EMENTITA AUSTENITA GAMMA G BAINITA MARTENSITA TOOSTITA SORBITA CLASIFICACIÓN DEL ACERO ACERO EUTECTOIDE ACERO HIPOEUTECTOIDE ACERO HIPEREUTECTOIDE DENOMINACIÓN DE LOS ACEROS SEGÚN NORMAS ACERO ESTRUCTURAL TRATAMIENTOS TÉRMICOS DEL ACERO TRATAMIENTOS SUPERFICIALES TRATAMIENTO TERMOQUÍMICOS TRANSFORMACIONES DURANTE EL ENFRIAMIENTO DEL ACERO (DIAGRAMAS T. T. T.) ACEROS AVANZADOS DE ALTA RESISTENCIA ( AHSS ) CONCEPTO GENERAL TIPOS DE AHSS DESCRIPCIÓN DEL ACERO DE DOBLE FASE PROPIEDADES MECÁNICAS DEL ACERO DOBLE FASE ESTRUCTURA DE LOS ACEROS FASE DOBLE

Aerometry instrumentation study Final report

Techniques and instruments for meteorological measurements in Mars and Venus atmosphere

NASA/ASEE Summer Faculty Fellowship Program. 1994 research reports

This document is a collection of technical reports on research conducted by the participants in the 1994 NASA/ASEE Summer Faculty Fellowship Program at Kennedy Space Center (KSC). This was the tenth year that a NASA/ASEE program has been conducted at KSC. The 1994 program was administered by the University of Central Florida in cooperation with KSC. The program was operated under the auspices of the American Society for Engineering Education (ASEE) with sponsorship and funding from the Office of Educational Affairs, NASA Headquarters, Washington, D.C. The KSC Program was one of nine such Aeronautics and Space Research Programs funded by NASA Headquarters in 1994. The NASA/ASEE program is intended to be a two-year program to allow in-depth research by the University faculty member. The editors of this document were responsible for selecting appropriately qualified faculty to address some of the many problems of current interest to NASA/KSC

NASA Tech Briefs, March 1988

Topics include: New Product Ideas; NASA TU Services; Electronic Components and Circuits; Electronic Systems; Physical Sciences; Materials; Computer Programs; Mechanics; Machinery; Fabrication Technology; Mathematics and Information Sciences; and Life Sciences

Fatigue precracking of a titanium alloy

The extensive use of Ti-6AI-4V forgings in aircraft gas engine compressor discs and blades has generated considerable interest in its crack growth behaviour at elevated temperatures. Before crack growth studies can be performed on test specimens it is necessary to precrack the specimen to provide consistently sharp fatigue cracks of adequate size and straightness. Initially the stress intensity amplitude used to grow a precrack is considerably higher than that used in the actual crack growth studies but it is progressively reduced as the required length of precrack is achieved. The reductions in stress intensity amplitude are usually made manually by observing the crack length as stress cycling proceeds and decreasing the stress amplitude on the test machine as the crack length grows. In this study, a method of performing this precracking operation automatically by the use of computer control of the test machine was developed, and tested. The results confirm the method used to be successful

NASA Tech Briefs, February 2001

The topics include: 1) Application Briefs; 2) National Design Engineering Show Preview; 3) Marketing Inventions to Increase Income; 4) A Personal-Computer-Based Physiological Training System; 5) Reconfigurable Arrays of Transistors for Evolvable Hardware; 6) Active Tactile Display Device for Reading by a Blind Person; 7) Program Automates Management of IBM VM Computer Systems; 8) System for Monitoring the Environment of a Spacecraft Launch; 9) Measurement of Stresses and Strains in Muscles and Tendons; 10) Optical Measurement of Temperatures in Muscles and Tendons; 11) Small Low-Temperature Thermometer With Nanokelvin Resolution; 12) Heterodyne Interferometer With Phase-Modulated Carrier; 13) Rechargeable Batteries Based on Intercalation in Graphite; 14) Signal Processor for Doppler Measurements in Icing Research; 15) Model Optimizes Drying of Wet Sheets; 16) High-Performance POSS-Modified Polymeric Composites; 17) Model Simulates Semi-Solid Material Processing; 18) Modular Cryogenic Insulation; 19) Passive Venting for Alleviating Helicopter Tail-Boom Loads; 20) Computer Program Predicts Rocket Noise; 21) Process for Polishing Bare Aluminum to High Optical Quality; 22) External Adhesive Pressure-Wall Patch; 23) Java Implementation of Information-Sharing Protocol; 24) Electronic Bulletin Board Publishes Schedules in Real Time; 25) Apparatus Would Extract Water From the Martian Atmosphere; 26) Review of Research on Supercritical vs Subcritical Fluids; 27) Hybrid Regenerative Water-Recycling System; 28) Study of Fusion-Driven Plasma Thruster With Magnetic Nozzle; 29) Liquid/Vapor-Hydrazine Thruster Would Produce Small Impulses; and 30) Thruster Based on Sublimation of Solid Hydrazin

The NASA/JPL 64-meter-diameter antenna at Goldstone, California: Project report, technical staff, tracking and data acquisition organization

The significant management and technical aspects of the JPL Project to develop and implement a 64-meter-diameter antenna at the Goldstone Deep Space Communications Complex in California, which was the first of the Advanced Antenna Systems of the National Aeronautics and Space Administration/Jet Propulsion Laboratory Deep Space Network are described. The original need foreseen for a large-diameter antenna to accomplish communication and tracking support of NASA's solar system exploration program is reviewed, and the translation of those needs into the technical specification of an appropriate ground station antenna is described. The antenna project is delineated by phases to show the key technical and managerial skills and the technical facility resources involved. There is a brief engineering description of the antenna and its closely related facilities. Some difficult and interesting engineering problems, then at the state-of-the-art level, which were met in the accomplishment of the Project, are described. The key performance characteristics of the antenna, in relation to the original specifications and the methods of their determination, are stated

NASA Tech Briefs, Summer 1979

Topics include: NASA TU Services: Technology Utilization services that can assist you in learning about and applying NASA technology; New Product Ideas: A summary of selected innovations of value to manufacturers for the development of neW products; Electronic Components and Circuits; Electronic Systems; Physical Sciences; Materials; Life Sciences; Mechanics; Machinery; Fabrication Technology; Mathematics and Information Sciences

Proceedings of the Scientific-Practical Conference "Research and Development - 2016"

talent management; sensor arrays; automatic speech recognition; dry separation technology; oil production; oil waste; laser technolog