CS7511
INDIRECT TENSILE TESTING FIXTURE

Specifications

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CS7511 INDIRECT TENSILE TESTING FIXTURE

General Information

The CS7511 Indirect Tensile Fixture was designed to attach directly to a rigid universal base plate located in the environmental chamber. This plate is supported by a 2.75 in. (69.85 mm) diameter column attached to a 25K (100kN) load cell (for high capacity force requirements). The load cell is secured to the lower 4 in. (102 mm) thick steel cross head. This solid assembly increases the accuracy of specimen deformation measurements during dynamic cyclic testing. This increase in fixture mounting rigidity, provides a significant reduction in fixture compliance and vibration during high cyclic testing


Features

The lower fixture base plate is machined from a solid aluminum billet and is supported by four (4) 1.250 in. (31.75 mm) hard-chrome plated steel columns for alignment accuracy and rigidity..
The loading plunger is supported by four (4) 1 in. (25.4 mm) diameter linear ball bushing to prevent side deflection at the rocker arm assembly.
The specimen loading strips are fabricated form 8620 steel case-hardened to 58 RC and plated with electroless nickel for corrosion resistance.
The upper and lower hardened loading strip is secured by two (2) socket cap screws.
The anti-rotation rods are fabricated from 1050 steel heat-treated to 60 RC, precision ground to a 10 micro-inch finish and hard chrome-plated to prevent rotation of the rocker arm assembly. The anti-rotation arm is attached to the rocker arm assembly and supported by four (4) linear ball bushings, rated at 1900 lb. each, located on each side of the rocker assembly.
The lower loading strips for 6 in. (150 mm) diameter specimens are attached to a riser block.

CS620 Gauge Head Holders
The LVDT holders conform exactly to the SHRP M007/AASHTO TP9 test requirements for gauge length, center line distance from specimen face and mounting pad size.

Features

The LVDT holder encapsulates the plunger end of the LVDT for protection from over-travel, allowing only the measuring tip to protrude out of the end of the LVDT holder for full travel distance of .040 in. ( ? .020 in or 0.5 mm ).
The fine thread, adjustable target is provided to aid in rapid setup and mechanical centering of the LVDT gauge heads.
The gluing fixture precisely locates four LVDT holders and four LVDT target pads per SHRP/AASHTO TP9 test requirements.

James Cox & Sons, Inc.

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