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Book A Summary of Numerous Strain Gage Load Calibrations on Aircraft Wings and Tails in a Technological Format

Download or read book A Summary of Numerous Strain Gage Load Calibrations on Aircraft Wings and Tails in a Technological Format written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fifteen aircraft structures that were calibrated for flight loads using strain gages are examined. The primary purpose of this paper is to document important examples of load calibrations on airplanes during the past four decades. The emphasis is placed on studying the physical procedures of calibrating strain-gaged structures and all the supporting analyses and computational techniques that have been used. The results and experiences obtained from actual data from 14 structures (on 13 airplanes and 1 laboratory test structure) are presented. This group of structures includes fins, tails, and wings with a wide variety of aspect ratios. Straight- wing, swept-wing, and delta-wing configurations are studied. Some of the structures have skin-dominant construction; others are spar-dominant. Anisotropic materials, heat shields, corrugated components, nonorthogonal primary structures, and truss-type structures are particular characteristics that are included. Jenkins, Jerald M. and DeAngelis, V. Michael Armstrong Flight Research Center ANISOTROPY; AERODYNAMIC LOADS; AIRCRAFT STRUCTURES; ASPECT RATIO; LOADS (FORCES); SWEPT WINGS; STRAIN GAGES; AERODYNAMIC CONFIGURATIONS; DELTA WINGS; FINS; TRUSSES...

Book Calibration of Strain gage Installations in Aircraft Structures for the Measurement of Flight Loads

Download or read book Calibration of Strain gage Installations in Aircraft Structures for the Measurement of Flight Loads written by T. H. Skopinski and published by . This book was released on 1953 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: A general method has been developed for calibrating strain-gage installations in aircraft structures, which permits the measurement in flight of the shear of lift, the bending moment, and the torque or pitching moment on the principle lifting or control surfaces. Although the stress in structural members may not be a simple function of the three loads of interest, a straightforward procedure is given for numerically combining the outputs of several bridges in such a way that the loads may be obtained. Extensions of the basic procedure by means of electrical combination of the strain-gage bridges are described which permit compromises between strain-gage installation time, availability of recording instruments, the data reduction time. The basic principles of strain-gage calibration procedures are illustrated by reference to the data for two aircraft structures of typical construction, one a straight and the other a swept horizontal stabilizer.

Book Strain Gage Loads Calibration Testing of the Active Aeroelastic Wing F a 18 Aircraft

Download or read book Strain Gage Loads Calibration Testing of the Active Aeroelastic Wing F a 18 Aircraft written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-20 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes strain-gage calibration loading through the application of known loads of the Active Aeroelastic Wing F/A-18 airplane. The primary goal of this test is to produce a database suitable for deriving load equations for left and right wing root and fold shear; bending moment; torque; and all eight wing control-surface hinge moments. A secondary goal is to produce a database of wing deflections measured by string potentiometers and the onboard flight deflection measurement system. Another goal is to produce strain-gage data through both the laboratory data acquisition system and the onboard aircraft data system as a check of the aircraft system. Thirty-two hydraulic jacks have applied loads through whiffletrees to 104 tension-compression load pads bonded to the lower wing surfaces. The load pads covered approximately 60 percent of the lower wing surface. A series of 72 load cases has been performed, including single-point, double-point, and distributed load cases. Applied loads have reached 70 percent of the flight limit load. Maximum wingtip deflection has reached nearly 16 in. Lokos, William A. and Olney, Candida D. and Chen, Tony and Crawford, Natalie D. and Stauf, Rick and Reichenbach, Eric Y. and Bessette, Denis (Technical Monitor) Armstrong Flight Research Center NASA/TM-2002-210726, NAS 1.15:210726, H-2490

Book Experiments to Study Strain gage Load Calibrations on a Wing Structure at Elevated Temperatures

Download or read book Experiments to Study Strain gage Load Calibrations on a Wing Structure at Elevated Temperatures written by Richard C. Monaghan and published by . This book was released on 1973 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laboratory experiments were performed to study changes in strain-gage bridge load calibrations on a wing structure heated to temperatures of 200 F, 400 F, and 600 F. Data were also obtained to define the experimental repeatability of strain-gage bridge outputs. Experiments were conducted to establish the validity of the superposition of bridge outputs due to thermal and mechanical loads during a heating simulation of Mach 3 flight. The strain-gage bridge outputs due to load cycle at each of the above temperature levels were very repeatable. A number of bridge calibrations were found to change significantly as a function of temperature. The sum of strain-gage bridge outputs due to individually applied thermal and mechanical loads compared well with that due to combined or superimposed loads. The validity of superposition was, therefore, established.

Book High Temperature and Torquemeter Strain Gage Applications

Download or read book High Temperature and Torquemeter Strain Gage Applications written by Society for Experimental Stress Analysis. Technical Committee on Strain Gages and published by . This book was released on 1974 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Flight loads measurements obtained from calibrated strain gage bridges mounted externally on the skin of a low aspect ratio wing

Download or read book Flight loads measurements obtained from calibrated strain gage bridges mounted externally on the skin of a low aspect ratio wing written by Clinton V. Eckstrom and published by . This book was released on 1976 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Strain Gages in Aircraft Structures Calibrations

Download or read book Strain Gages in Aircraft Structures Calibrations written by Paul H. Adams and published by . This book was released on 1977* with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Strain Gages on Composites

    Strain Gages on Composites

    Book Details:
  • Author : Society for Experimental Stress Analysis. Technical Committee on Strain Gages
  • Publisher :
  • Release : 1973
  • ISBN :
  • Pages : 40 pages

Download or read book Strain Gages on Composites written by Society for Experimental Stress Analysis. Technical Committee on Strain Gages and published by . This book was released on 1973 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Use of Calibrated Strain Gauges for Flight Load Determination

Download or read book The Use of Calibrated Strain Gauges for Flight Load Determination written by Peter Burno Hovell and published by . This book was released on 1969 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Suggested Procedures for Installing Strain Gauges on Langley Research Center Wind Tunnel Balances Custom Force Measuring Transducers Metallic and Composite Structural Test Articles

Download or read book Suggested Procedures for Installing Strain Gauges on Langley Research Center Wind Tunnel Balances Custom Force Measuring Transducers Metallic and Composite Structural Test Articles written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-11 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: The character of force and strain measurement testing at LaRC is such that the types of strain gauge installations, the materials upon which the strain gauges are applied, and the test environments encountered, require many varied approaches. In 1997, a NASA Technical Memorandum (NASA TM 110327) was generated to provide the strain gauge application specialist with a listing of recommended procedures for strain gauging various transducers and test articles at LaRC. The technical memorandum offered here is an effort to keep the strain gauge user informed of new technological enhancements in strain-gauging methodology while preserving the strain-gauging guidelines set forth in the 1997 TM. This document provides detailed recommendations for strain gauging LaRC-designed balances and custom transducers, composite materials, cryogenic and high-temperature test articles, and selected non-typical or unique materials or test conditions. Additionally, one section offers details for installing Bragg-Grating type fiber-optic strain sensors for non-typical test scenarios.Moore, Thomas C., Sr.Langley Research CenterSTRAIN MEASUREMENT; STRAIN GAGES; FIBER OPTICS; HIGH TEMPERATURE TESTS; COMPOSITE MATERIALS; BRAGG GRATINGS; TRANSDUCERS; WIND TUNNEL APPARATUS