Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Mechanical measurement system
Patent
1997-02-25
1998-10-20
Voeltz, Emanuel Todd
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Mechanical measurement system
73 87, 73799, G01N 308
Patent
active
058262130
ABSTRACT:
The system consists of a series of programs that enable a user to investigate possible toughening mechanisms against crack growth in composites and brittle materials consisting of different combinations of materials and containing planar interfaces and elliptically shaped microstructures. The programs begin with various materials, sizes and orientations of microstructures, distances of a crack from a material interface, and possible formulas for energy absorption mechanisms of interest to the user. They then allow a crack to advance toward an interface numerically integrate over a circular and microstructural regions and thus calculate the balance of various energy quantities during crack advance. They then transform the final calculations into a graph display of net energy per incremental length of crack advance versus crack distance from the microstructural entity in question. An advantage of the system is that it allows a user to investigate possible toughening mechanisms against fracture without testing a new specimen each time in a laboratory.
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Smith Demetra R.
Todd Voeltz Emanuel
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