Analysis of mass and cost drivers of unstiffened isotropic shell structures considering their imperfection sensitivity

The paper gives the study of the response of carbon fiber reinforced polymers (CRFP) quasi-isotropic shell structures under the influence of dynamic loading. The quasi-isotropic CRFP shell specimens are fabricated using Multipreg E720 laminates. These laminates are laid in such a way that shell structure has equal strength and mechanical properties in the two-dimensional (2D) plane and hence can be regarded as quasi-isotropic. In this study, the dynamic loading is generated using shock waves in a shock tube experimental setup. The strain and pressure data is collected from the experiments. Additional tests are carried out using Material Test System (MTS) for both tensile and flexural response of CRFP. Results obtained from experiments are compared with numerical simulations using ANSYS Multiphysics 14.0 finite element method (FEM) package. The numerical simulation and experimental results are found to be in good agreement.

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A higher order shell element for wave propagation in isotropic shell structures

Shell Structures: Theory and Application ◽

10.1201/b15684-118 ◽

2013 ◽

pp. 473-476

Author(s):

A Żak ◽

M Krawczuk

Keyword(s):

Wave Propagation ◽

Shell Element ◽

Higher Order ◽

Shell Structures ◽

Isotropic Shell

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Arch-Supported Reticulated Shell Structures and Their Static Mechanical Behaviour

International Journal of Space Structures ◽

10.1260/026635102321049529 ◽

2002 ◽

Vol 17 (4) ◽

pp. 263-269 ◽

Cited By ~ 2

Author(s):

Yuan-Qi Li ◽

Zu-Yan Shen

Keyword(s):

Mechanical Behaviour ◽

Single Layer ◽

Structural Features ◽

Shell Structures ◽

Hybrid Structures ◽

Structural System ◽

Imperfection Sensitivity ◽

Geometrical Imperfection ◽

Static Mechanical ◽

Arch Structures

Based on the structural features of reticulated shells, arch structures, etc., arch-supported reticulated shell structures have been developed as a new large-span space structural system. In the paper, the acceptability of this hybrid structural system and the reasonable combination of arch structures and reticulated shells with different Gaussian curvatures are discussed. Several ideas on using arch-supported reticulated shell structures to form openable structures are also mentioned. Compared to single-layer reticulated shells, the mechanical behaviour of the hybrid structures, especially the influence of initial geometrical imperfection, was investigated through nonlinear analysis and experimental research on three typical models. Analysis indicates that hybrid structures can efficiently decrease the geometrical imperfection sensitivity and improve their integral mechanical behaviour, which proves that this type of hybrid structures can be used widely.

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