Author(s)

S.M. Hansen & D.W. Jensen

Abstract

The patented IsoTruss™ grid structure is a revolutionary configuration that utilizes a unique geometry with lightweight composite materials to efficiently support loads. IsoTruss™ structures consist of interwoven longitudinal and helical members composed of intersecting fiber tows at joints. Spreading the fibers to achieve mechanical interlocking for increased joint integrity introduces gaps and curvilinear fiber paths. Such nonlinearities could initiate local delamination, reducing the overall structural strength and potentially limiting fatigue life. These effects can be minimized by optimizing tow interweaving pattern and proper fiber consolidation. This research quantified the effects of these parameters on the local compressive strength of composite lattice structures. Test specimens were f

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