SAMPLE TEST PROGRAMFull-Scale Wingbox Test
Intec designed and conducted this test program to verify the structural performance of a large wing box under combined vertical shear, bending, and internal pressure loading.
Test in progress
The test article was a simulated wing. Intec designed and fabricated load introduction and reaction fixturing, applied instrumentation and performed static tests. The total assembly, including metallic fixtures at the root and tip, measured approximately 170" long, 60" wide, and 20" deep. Intec engineers developed a detailed FEM model of the composite wing root that was required for the design of the load reaction fixturing.
Side view of test set-up
The test configuration consisted of the instrumented wingbox cantilevered from a reinforced concrete strong back, and supported at the root end to a reinforced concrete load floor. Four independent hydraulic actuators were positioned to introduce shear loads and bending moments into the wing.
Intec technicians installed a proprietary data acquisition system to record data from more than 375 strain gages, four load cells, four displacement transducers and two pressure transducers. This Intec-designed data acquisition and control system allows for significant cost reduction when reading large numbers of strain gages at moderate sampling rates.
Isometric scale drawing of test set-up
Real-time displays of the load, displacement, pressure, and selected strain data was provided on a large monitor during the tests. A pressurization system was also installed to fill the wingbox with approximately 350 gallons of water, produce a controlled pressure ramp up to 40 psi, and drain the water out of the wing to allow ultrasonic inspection between each test.
Sample Programs
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