The device described here measures the torque-tension relationship for fasteners as small as #0. The small-bolt tester consists of a plate of high-strength steel into which three miniature load cells are recessed. The depth of the recess is sized so that the three load cells can be shimmed, the optimum height depending upon the test hardware. The three miniature load cells are arranged in an equilateral triangular configuration with the test bolt aligned with the centroid of the three. This is...
Topics: NASA Technical Reports Server (NTRS), BOLTS, MEASURING INSTRUMENTS, MINIATURIZATION, TORQUE, HIGH...
A viewgraph presentation on the correlation of Polymer Matrix Composites (PMC) and Metal Matrix Composites (MMC) bonded joints using three dimensional finite element analyses with materials tests is shown.
Topics: NASA Technical Reports Server (NTRS), THREE DIMENSIONAL MODELS, FINITE ELEMENT METHOD, METAL MATRIX...
The effect of various lubricants and other compounds on fastener torque-tension relationships is evaluated. Testing was performed using a unique test apparatus developed by Posey at the NASA Goddard Space Flight Center. A description of the test methodology, including associated data collection and analysis will be presented. Test results for 300 series CRES and A286 heat resistant fasteners, torqued into various types of inserts will be presented. The primary objective of this testing was to...
Topics: NASA Technical Reports Server (NTRS), FASTENERS, TORQUE, LUBRICANTS, THERMAL RESISTANCE, NASA...
