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Effect of Interaction of Gaps on Compressive Strength of Automated-fiber-placement-manufactured Laminates by Hiroshi Suemasu; Yuichiro Aoki; Sunao Sugimoto; Toshiya Nakamura is a Engineering article available to read on EtoBox.

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Compression tests of quasi-isotropic laminates with embedded gaps were conducted to reveal the effect of the gap(s) on their compressive strength. Specimens were prepared such that the gaps are located at designated relative positions on a free side edge of the gage section. An analytical solution for a two-dimensional mechanical model of quasi-isotropic laminates with an arbitrary inclined gap is used to estimate the stress changes at the free edge owing to inclined gaps in the arbitrary relative locations. The relative reductions in the compressive strengths of the specimens with different gap arrangements were consistent with the analytically estimated increases in stress. The present results indicate that the significant reduction in compressive strength is caused not only by the waviness of the laminas at the gaps but also by the stress concentration at the free boundary due to the gap ends. Moreover, it is found that the standardized compression test may not be adequate to investigate the effect of the defect introduced by automated-fiber-placement method on the strength of the laminates because the sizes of the gage section of the compression test specimens specified by stan

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Author

Hiroshi Suemasu; Yuichiro Aoki; Sunao Sugimoto; Toshiya Nakamura

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)