Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1997-06-24
1998-09-22
Chilcot, Richard
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73856, G01N 308, G01N 302
Patent
active
058116869
ABSTRACT:
The present invention provides a fixture for supporting an elongated specimen for crush testing. The fixture comprises a base plate, four guiding rods, a sliding plate, four support rods and two collars. The guiding rods connect to the base plate and extend in a direction substantially perpendicular to the base plate. The sliding plate has linear bearings which encircle the guiding rods and enable translation of the sliding plate along the axis of each guiding rod. The four supporting rods mount to the base plate and also extend in a direction substantially perpendicular to the base plate. Each support rod has a keyway for a wedge which contacts the elongated specimen and holds the specimen in place during crushing. Each collar lies above the sliding plate and holds a pair of support rods on their ends opposite the ends connected to the base plate. A spherical bearing sits on top of the sliding plate and transfers an applied load to the sliding plate, which moves downward and crushes the elongated specimen.
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K. Jackson et al., "Scaling of energy composite plates", AHS 48th Annual Forum, Washington, DC, Jun. 3-5, 1992, pp. 1431-1440.
ASTM Standards D 695-91, "Standard test method for compressive properties of rigid plastics", pp. 82-87. of polymer matrix composite materials with unsupported gage section shear loading", pp. 129-144.
Jackson Karen E.
Lavoie J. Andre
Morton John
Chilcot Richard
Edwards Robin W.
Noori Max H.
The United States of America as represented by the Administrator
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