Pressure-bearing performance of sliding poly-p-phenylene benzobisoxazole-rope-reinforced spherical composite envelope structures

Li, Shiping; Chen, Longlong; Song, Yinbo; Mi, Xiang; Chen, Wujun; Zhao, Haitao

doi:10.1016/j.tws.2022.109929

Cited by 4 publications

(1 citation statement)

References 30 publications

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“…The calculated results are 0.970:1 and 1.103:1, respectively. At the same time, we bring the relevant research results in the existing reference (Li et al, 2022) into equation (10), and the deviation is rather small, as shown in Table 8. The results indicated that equation (10) could provide not only accurate strength prediction, but also the right broken location of the airship envelope.…”

Section: Airship Strength Prediction Criterionmentioning

confidence: 99%

Experimental study and refined numerical simulation of ultimate pressure-bearing performance of rope-reinforced airship envelope structures

Li,

Chen,

Chen

et al. 2024

Advances in Structural Engineering

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Stratospheric airships require a lightweight envelope to contain lighter-than-air buoyancy gas, making the lightweight design and pressure-bearing performance of the envelope structure a key research issue. The stress state at different cross-sectional positions of the airship envelope structure is different, resulting in a low utilization rate of the overall material performance of the envelope structure. This paper proposes a design scheme for reinforcing envelope structures with sliding reinforcing cable to improve the bearing capacity of the composite fabric structure while reducing its weight, ultimately achieving the optimal strength-to-weight ratio. Two types of composite fabric structures (A-airship and B-airship) were subjected to inflatable burst tests, and the strain changes in the envelope gores were analyzed by digital image correlation. Through re-assembly of the broken composite fabric pieces and analysis of their tear textures, crack origination positions, failure causes, and the stress behavior and state at the failure position were identified. An envelope structural model with consideration of the cutting pattern effect was established, allowing the stress distribution of the envelope to be analyzed and the damage positions to be more accurately predicted. Based on the analysis of the ultimate pressure-bearing performance of an airship envelope structure, a novel idea of incorporating coupled tensile-shear stress into the strength criterion was proposed. Through the data in the study and existing references, it is verified that the strength criterion can accurately predict the ultimate pressure-bearing performance of the envelope structure.

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Section: Airship Strength Prediction Criterionmentioning

confidence: 99%