A scaled test on the damage and vibration behavior of reinforced concrete nuclear containment subjected to a large aircraft impact

Wang, F.; Liu, J.B.; Bao, X.; Sun, Yong; Lu, Xunlin; Wang, D.

doi:10.1016/j.engstruct.2022.114755

Cited by 9 publications

(2 citation statements)

References 13 publications

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“…Impact phenomena [1][2][3] are widely prevalent in domains such as transportation, civil engineering, and aerospace, resulting in substantial risks and damages to both safety and property. Consequently, the investigation of strategies and methodologies for impact mitigation is of practical significance.…”

Section: Introductionmentioning

confidence: 99%

Machine learning accelerated search for the impact limit of the graphene/aluminum alloy whipple structure

Ge,

Zhu,

Jiang

2023

Nanotechnology

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This paper proposes a Whipple structure to enhance the impact resistance of graphene/aluminum alloy composites by varying the interlayer spacing between graphene and aluminum alloy. The increased interlayer spacing provides more deformation space for the graphene to absorb more deformation energy, and enables the formation of a debris cloud from the bullet fragments and graphene fragments, significantly reducing the impact energy per unit area of the next material. The impact limit serves as a critical metric for assessing the impact resistance of the Whipple structure. Based on molecular dynamics simulations, we developed a machine learning model to predict the protection of aluminum alloy, and quickly determined the impact limits of velocity, bullet radius, and interlayer spacing by using the machine learning model. An empirical equation for the impact limit of interlayer spacing was established. The results showed that non-zero interlayer spacing can significantly improve the impact resistance of the hybrid structure; to fully exploit the superior impact resistance of this Whipple structure, the number of graphene layers should be at least 3. Furthermore, at high impact velocities and large bullet radii, the impact limit of the interlayer spacing exhibits a substantial correlation with the number of graphene layers. These results provide valuable information for the design of the impact resistance of the graphene/aluminum alloy composites.

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Section: Introductionmentioning

confidence: 99%

Machine learning accelerated search for the impact limit of the graphene/aluminum alloy whipple structure

Ge,

Zhu,

Jiang

2023

Nanotechnology

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“…Vibration testing is one of the most popular methods of experimentation used to understand complicated systems and their dynamical responses. It is often used for systems such as weapons, pipelines, turbines, aircraft, or nuclear plants that exhibit high complexity as vibration testing is often a significantly cheaper alternative than subjecting the system of interest to its service environment [ 1 , 2 , 3 , 4 ]. Failure to understand the dynamical responses for such complex systems may lead to unexpected costs, delays, or even catastrophic failure.…”

Section: Introductionmentioning

confidence: 99%

Insights on the Impacts of Accelerometer Location on the Dynamics and Characteristics of Complex Structures

Takeshita,

Madrid,

Granillo

et al. 2023

Sensors

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There exists a high level of difficulty in understanding the physical responses of complex dynamical systems. To this end, researchers have previously used different measurement techniques, such as displacement sensors or accelerometers, in the laboratory to capture a system’s dynamics. A well-known structure in the literature is the Box Assembly with Removable Component (BARC) whose purpose is to gain a deep understanding of testing complex systems. Further breaking down the structure, the Removable Component (RC) portion is often used as a relatively simplified version which retains significant complexity from the original system. However, the placement of accelerometers on the RC have varied greatly throughout the literature which presents a challenge in comparing results and may not accurately represent the system’s dynamics. Finite Element Analysis (FEA) is performed for three common accelerometer locations to determine how their placement affects the frequencies and mode shapes for the RC and results are compared against those without accelerometers. Free vibration experiments are carried out to understand the variation of frequencies and damping for each accelerometer location to obtain the overall response for the first mode of vibration. Next, random vibration experiments are run to gain insight on the interaction between linear and nonlinear responses based on excitation level, while showing the influence of an accelerometer’s location on system dynamics. The results demonstrate that the location of the accelerometer is highly influential on the linear and nonlinear characteristics of the system. It is proved that for the first mode of vibration, nonlinear softening and nonlinear damping behaviors may take place due to the interaction between the location of accelerometers, direction of excitation, and response axis analyzed.

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Low-velocity impact response of the post-buckled FG-MEE plate resting on visco-Pasternak foundation: Magneto-electro-mechanical effects-based interaction analysis

Li,

Nie,

Ren

2024

Composite Structures

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A scaled test on the damage and vibration behavior of reinforced concrete nuclear containment subjected to a large aircraft impact

Cited by 9 publications

References 13 publications

Machine learning accelerated search for the impact limit of the graphene/aluminum alloy whipple structure

Machine learning accelerated search for the impact limit of the graphene/aluminum alloy whipple structure

Insights on the Impacts of Accelerometer Location on the Dynamics and Characteristics of Complex Structures

Low-velocity impact response of the post-buckled FG-MEE plate resting on visco-Pasternak foundation: Magneto-electro-mechanical effects-based interaction analysis

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