Improved Energy Absorption Characteristics Based on Elastic Polymer-Modified Porous Material for Multiple Extreme Mechanical Impacts

Zhang, Jinming; Dai, Keren; Yu, Dakuan; Yang, Benqiang; Zhang, He; You, Zheng

doi:10.3390/app10010110

Cited by 6 publications

(4 citation statements)

References 31 publications

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“…Due to their good elastic properties, elastic frameworks can achieve rapid rebound after compression, forming a stiff armor layer to retain the porous structures. [48][49][50] During the next mechanical impact, the compression deformation of the pores continues to achieve good energy absorption.…”

Section: Mechanical Properties Of Ag Nds/cnt@pc/ni: Synergistic and C...mentioning

confidence: 99%

Superior Electromagnetic Shielding and Mechanical Buffering Achieved by Alternating Conductive and Porous Supramolecular Networks

Yang

Dai

et al. 2022

Adv Eng Mater

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The development of electromagnetic interference (EMI) shielding materials with excellent EMI shielding effectiveness (SE), and superior mechanical performance is of great importance in daily life and in the military, where they are used for intelligent transportation systems and ammunition. Generally, shielding performances can be realized via reflection loss and absorption loss. However, it is still a challenge to enhance these two kinds of electromagnetic wave loss in the same material at the same time to achieve ideal shielding performance. Herein, a flexible Ag NDs/CNT@PC/Ni‐9 film composed of five conductive layers and four porous layers is prepared by alternating Ag NDs/CNT layers and PC/Ni layers through self‐assembly. The obtained film with a thickness of 890 μm exhibits a remarkable SE performance of 138 dB in the X‐band. Additionally, with a series of continuous volcanic mechanical impacts (>10 000 g), the maximum instantaneous acceleration is decreased by 30.02% due to the buffering of the film, which constitutes a much‐improved energy absorption cushion relative to that of traditional buffering materials, such as foam metal and rubber. A material integrated with strong EMI shielding and high mechanical shock resistance is designed, which provides an effective strategy for the development of functional materials for extreme environments.

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Section: Mechanical Properties Of Ag Nds/cnt@pc/ni: Synergistic and C...mentioning

confidence: 99%

Superior Electromagnetic Shielding and Mechanical Buffering Achieved by Alternating Conductive and Porous Supramolecular Networks

Yang

Dai

et al. 2022

Adv Eng Mater

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“…Moreover, the acceleration sensor is fixed to the shell to reduce the influence of vibration. The surplus space inside the measurement system is filled with epoxy resin [17], which reduces the impact of overload and electromagnetic interference as well as the damage to the internal electronic devices of the measurement system during recovery. In order to ensure the reliable recovery of electronic devices during the launching process, 1045 steel is used as the protection material of the whole testing system.…”

Section: ) Minimizing Effects Of Interference Through Spatial Separation and Synchronous Triggeringmentioning

confidence: 99%

In-Bore Dynamic Measurement and Mechanism Analysis of Multi-Physics Environment for Electromagnetic Railguns

Yang

Dai

Yin³

et al. 2021

IEEE Access

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Electromagnetic launch technology has important applications in many fields. However, the extremely harsh multi-physics environment during the launch is quite different from that of conventional guns. Little experimental research studied the dynamic distribution of the extreme impact environment and magnetic fields in the projectile. To this end, this paper designs a projectile-borne storage testing system for the dynamic measurement of harsh multi-physics environments. The detailed assessment of the measured dynamic multi-physics field shows that the velocity skin effect (VSE) is an important factor affecting the dynamic results. It causes a higher current density in the armature, and the magnetic induction and acceleration in the dynamic experiment are lower than those in the static-based experiment and simulation. Moreover, it causes the concentrated heat on the trailing edge of the armature, which lead to the melt-wave erosion, even affects the movement of integrated projectile during launch. Furthermore, the physical mechanism behind these phenomenon is revealed, and the causes of muzzle velocity error are analyzed. In conclusion, a feasible, dynamic measurement method for multi-physics coupled environments is presented, which can provide references for follow-up modeling and simulation researches and promote the development of railguns.INDEX TERMS Electromagnetic railgun, multi-physics coupled environment, projectile-borne storage testing system, velocity skin effect

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“…The attenuation coefficient and the phase velocity are important parameters which can be calculated to assess the composite material robustness [44][45][46]. Moreover, the magnetostractive pulse-echo technique can be effectively used for evaluating the attenuation coefficient (ζ) and the phase velocity (Cp) as discussed in [47,48].…”

Section: Ultrasonic Diagnostic Of the Bladesmentioning

confidence: 99%

Dynamic Performance Enhancement of Vertical Wind Turbine Using Composite Blades Reinforced by Zinc-Oxide Nanoparticles. (Dept. M.)

Khader¹,

Mansour²,

Fahham³

et al. 2020

MEJ. Mansoura Engineering Journal

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rapid depletion of fossil fuels is the major concern of the industrial countries' over the last decades. Fortunately, the rapid depletion problem can be resolved using clean and cheap renewable resources like wind and solar energy. These renewable energy sources can compensate for the shortage between the growing demand and the available traditional types of energies in countries that are suffering from insufficient traditional energies. Apparently, renewable energy sources can be used in many applications which include generating cheap electricity for the deprived communities in the desert areas in addition to powering the desalination plants for producing the

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Improved Energy Absorption Characteristics Based on Elastic Polymer-Modified Porous Material for Multiple Extreme Mechanical Impacts

Cited by 6 publications

References 31 publications

Superior Electromagnetic Shielding and Mechanical Buffering Achieved by Alternating Conductive and Porous Supramolecular Networks

Superior Electromagnetic Shielding and Mechanical Buffering Achieved by Alternating Conductive and Porous Supramolecular Networks

In-Bore Dynamic Measurement and Mechanism Analysis of Multi-Physics Environment for Electromagnetic Railguns

Dynamic Performance Enhancement of Vertical Wind Turbine Using Composite Blades Reinforced by Zinc-Oxide Nanoparticles. (Dept. M.)

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