Engineering topics
Publications and source records attributed to Gregg, M. Wayne.
This viewgraph presentation addresses the fracture control requirements for space station habitable modules. The presentation puts an emphasis on the welding of panels on module pressure shells, and recommends an inspection plan for these components.
This viewgraph presentation addresses fatigue tests on fasteners, the fracture requirements for fasteners, and quality control for fasteners.
The elastic-plastic fracture mechanics modules in NASGRO have been enhanced by the addition of of the following: new J-integral solutions based on the reference stress method and finite element solutions; the extension of the critical crack and critical load modules for cracks with two degrees of freedom that tear and failure by ductile instability; the addition of a proof test analysis module that includes safe life analysis, calculates proof loads, and determines the flaw screening 1 capability for a given proof load; the addition of a tear-fatigue module for ductile materials that simultaneously tear and extend by fatigue; and a multiple cycle proof test module for estimating service reliability following a proof test.