Results 1 to 10 of about 552,345 (264)

Experimental study on anti-penetration mechanism of bolted composite protective structure with limited span under impact of low-velocity projectile

Defence Technology, 2022
In order to study the influence of the bolt joint mode on low-velocity projectiles penetrating the composite protective structure, two bolt joint models which connect the composite target to the fixed frame were designed, the ballistic test of the bolted
Yu-jia Liu, Dian Li, Hai-liang Hou, Zhu-jie Zhao, Yue Xie   +4 more
doaj   +3 more sources

A Novel Method for Damage Prediction of Stuffed Protective Structure Under Hypervelocity Impact by Stacking Multiple Models

IEEE Access, 2020
Adopting appropriate protective structures to resist the impact of micrometeoroid or space debris on spacecraft is a valuable research content of space engineering.
Wenzhe Ding, Xinhong Li, Hong Yang, Jiping An, Zhibin Zhang   +4 more
doaj   +3 more sources

Numerical Integration Study of Penetration and Blasting Damage for Composite Underground Protective Structure with Reinforcement Layers

Buildings
In response to the increasing threat of powerful earth-penetrating weapons, underground protective structures typically employ composite structural systems with reinforced steel layers.
Xingji Zhu, Can Zhao, Longjun Xu, Yujin Wang, Shibin Lin, Guochen Zhao   +5 more
doaj   +3 more sources

Growth, yield and microbial contamination of lettuce (Lactuca sativa L.) grown under two types of cultivation system as influenced by different organic fertilizers

Annals of Tropical Research, 2022
Increasing popularity of lettuce in the tropics is becoming evident due to its widespread use in health and nutrition. Lettuce, a ready-to-eat vegetable is expected to be safe and of good quality.
Blanche Franchette D. Llera, Zenaida C. Gonzaga, Julie D. Tan   +2 more
doaj   +1 more source

Evaluation of the protection and presentation of historic buildings in the Viminacium Archaeological Park in relation to their spatial context [PDF]

Spatium, 2018
Viminacium was the capital of the Roman province of Moesia Superior and an important legionary fortress. Today it is an archaeological park with protected and presented historic buildings and contemporary facilities, situated by the thermo power
Nikolić Emilija
doaj   +1 more source

Numerical Research on Influencing Factors of Hydrodynamics Ram Effect and Protective Structure

Hangkong gongcheng jinzhan, 2022
As the most vulnerable part of the aircraft,the fuel tank is damaged by hydrodynamics ram effect when attacked by high-speed projectiles,which will directly threaten the safety of the aircraft.The numerical research on the hydrodynamics ram effect is of ...
YANG Qiuzu, ZHANG Yulin, YANG Yang, XU Fei, WANG Jizhen   +4 more
doaj   +1 more source

Field Test and Numerical Simulation of a New Layered Structure

Buildings, 2023
To study the attenuation and dispersion effect of a new protective structure distribution layer constructed with a hollow particle composite material on the shock wave, a similar model field explosion test was carried out in this paper.
Ying-Qi Hao, Zhong-Bao Ye, Xin-Gui Zhou
doaj   +1 more source

Effect of nonequivalent doping on dielectric and microwave absorbing properties of LaFeO3-based ceramics

Journal of Materials Research and Technology, 2023
Development of microwave absorption materials (MAMs) with thin thickness, high oxidation resistance and tunable effective absorbing bandwidth (EAB) is particularly urgent for practical applications but remains a great challenge. In this work, a series of
Peng Wu, Wenting He, Hongbo Guo
doaj   +1 more source

Insight into nitriding behavior and corrosion mechanism in 17-4PH steel: The influence of nanocrystalline structure

Journal of Materials Research and Technology, 2023
In this study, the influence of nanocrystalline structure on the plasma nitriding (PN) behavior of 17-4PH steel and corresponding corrosion mechanisms under different treatments were systematically investigated.
Dan Liu, Daoxin Liu, Yinghao Wu, Jing Yang, Xingchen Xu, Mengyao Li, Shaolong Li, Amin Ma, Yilong Liang   +8 more
doaj   +1 more source

The concept of a prefabricated structure for protection of critical infrastructure facilities [PDF]

Biuletyn Wojskowej Akademii Technicznej, 2018
The paper presents the concept of a protective structure in the form of a prefabricated reinforced concrete protective dome intended for protection of a single critical infrastructure facility [1].
Kamil Sobczyk, Ryszard Chmielewski, Krzysztof Duda   +2 more
doaj   +1 more source