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ARTEMIS: The Archery-Related Tree-Elevation Mechanism for Improved Success

Produced at Winona State University, College of Science and Engineering. Design Project I/II (CME 475/480)

Part and Coupon Testing

Two major tests were performed on the ARTEMIS prototype: a static loading test at the 'part' level, and a dynamic loading test at the 'coupon' level. The article test unit, shown in part here was tested in a 5585H model Instron to failure at a strain rate of 0.2 in/min. Due to server hosting limitations, videos of the part testing could not be included; however, images of the part testing can be seen below.

image of the test fixture setup prior to article mounting image of the test fixture setup and test article unit image of the test fixture setup with load dispersive plate under the loading nose

Severe delamination was noted on several corners of the article test unit upon removal from the fixture, along with debonding between the honeycomb core sheets. The debonding between the cores triggered failure, with the supported load dropping from 568 to 500 lb and limited load recovery. Upon removal of the load, the base panel elastically recovered to its starting shape.

No images of the coupon level tests were taken. A three point flex test was performed on the test coupon, using the Model 1331 Instron, with a loading frequency of 1 Hz. The loading applied was determined by dividing the total load capacity (600 lb) by the width of the panel and then multiplying by the width of the coupon. After 5000 cycles, no permanent deformation had occurred, nor was any delamination observed. Coupon testing was performed in respect to COMTEC's desire to use the Instron.

Weathering tests (UV light and water degradation) were not performed, due to time constraints.