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Combined effects of the in-plane orientation angle and the loading angle on the dynamic enhancement of honeycombs under mixed shear-compression loading

Abstract : The combined effect of the loading angle (ψ) and the in-plane orientation angle (β) on the dynamic enhancement of aluminium alloy honeycombs is investigated. Experimental results are analysed on the crushing surfaces (initial peak and average crushing forces). A significant effect of the loading angle is reported. The dynamic enhancement rate depends on the loading angle until a critical loading angle (ψ critical ). Beyond, a negative dynamic enhancement rate is observed. Concerning the in-plane orientation angle β effect, it depends on the loading angle ψ under quasi-static conditions. Under dynamic conditions, a significant effect is reported independently of the loading angle ψ. Therefore, the dynamic enhancement rate depends on the combined effects of ψ and β angles. A global analysis of the buckling mechanisms allowed us to explain the combined effect of ψ and β angles on the initial peak force. The collapse mechanisms analysis explain the negative dynamic enhancement rate for large loading angles.
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Submitted on : Wednesday, November 24, 2021 - 3:58:51 PM
Last modification on : Thursday, November 25, 2021 - 3:45:35 AM

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Rami Tounsi, Eric Markiewicz, Grégory Haugou, Fahmi Chaari, Bassem Zouari. Combined effects of the in-plane orientation angle and the loading angle on the dynamic enhancement of honeycombs under mixed shear-compression loading. The European Physical Journal. Special Topics, EDP Sciences, 2016, 225 (2), pp.243-252. ⟨10.1140/epjst/e2016-02632-9⟩. ⟨hal-03447035⟩

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