Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Reexamination Certificate
2006-12-19
2006-12-19
Noori, Max (Department: 2855)
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
C073S856000
Reexamination Certificate
active
07150200
ABSTRACT:
A miniature axisymmetric streamline tensile (MAST) specimen having improved axisymmetric surface profile design and surface stress concentration factor (SSCF) improvements, i.e., close to unity is described. The MAST specimen also has improved variable curvature transition fillets, miniaturized profile dimension and shoulder region features used in conjunction with the collet loading method. An axisymmetric, rather than flat, design is preferred since no stress gradients exist in the hoop direction, i.e., circumferential direction, of the specimen. The MAST specimen is designed to permit various loading options. The MAST specimen10may be used for testing any suitable material including, but not limited to, metals, plastics and ceramics.
REFERENCES:
patent: 5286108 (1994-02-01), Whatley et al.
patent: 6460418 (2002-10-01), Hiyoshi
Donald W. Oplinger et al, On the Streamline Specimen for Tension Testing of Composite Materials,Paper, 1985,pp. 532-555,American Society for Testing and Materials, Philadelphia.
Noori Max
The United States of America as represented by the Secretary of
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