Results 1 to 10 of about 1,333,516 (246)

Combining protective clothes with human body models for finite element ballistic impact simulations

Communications in Development and Assembling of Textile Products, 2023
The ballistic deformation of an ultra-high-molecular-weight (UHMW) polyethylene (PE) composite has been subjected numerically to a multi-layered soft ballistic fabric package modelled upon the body contours of the Global Human Body Models Consortium ...
Matthias Boljen, Marcin Jenerowicz, Steffen Bauer, Elmar Straßburger   +3 more
doaj   +7 more sources

Undrained Stability Analysis of Shallow Tunnel and Sinkhole in Soft Clay: The Cavity Contraction Method

Applied Sciences, 2021
This paper presents theoretical methods for the undrained stability analysis of shallow tunnels/sinkholes in clay based on the cavity contraction theory, with some assumptions and simplifications.
Hui Qi, Wenjie Cui, Huaijian Li, Junwei Cheng, Lingdi Kong, Xiaonan Wang, Jianliang Zhang, Gongzeng Yang, Hongya Yue, Xiuguang Song   +9 more
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Numerical Simulations of Vertical Discrete Gusts Driven by Trailing Edge Blowing

International Journal of Aerospace Engineering, 2023
A new type of gust generator generates the airflow oscillation in the wind tunnel through the Coanda effect of the unsteady trailing edge blowing, which has been shown to have strong potential for accurately simulating discrete gusts.
Yang Shi, Bo Lu, Peng Guo, Binbin Lv, Hongtao Guo, Li Yu   +5 more
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A preliminary study on static pressure probe mobile measurement method for flow field in transonic wind tunnel

Xibei Gongye Daxue Xuebao, 2021
The axial Mach number distribution of the core flow for model in a transonic wind tunnel is an important index to evaluate the performance of the flow field, which is usually measured by the centerline probe.

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The Aerodynamic Characteristics of a Diamond Joined-Wing Morphing Aircraft

International Journal of Aerospace Engineering, 2022
This paper presents a new-concept aircraft with a diamond joined-wing morphing configuration, which simultaneously adjusts the sweep angles of both the front wing and rear wings by a telescopic support rod. The compressible Navier-Stokes equations in the
Shuai Miao, Xiaoyong Ma, Cheng Chen, Binhua He, Yong Huang   +4 more
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Data assimilation of structural deformation using finite element simulations and single-perspective projection data based on the example of X-ray imaging

SN Applied Sciences, 2021
Gaining insight in the complex deformation processes inside a vehicle during the process of crashing is to date only possible via numerical simulations.
Ines Butz, Stefan Moser, Siegfried Nau, Stefan Hiermaier   +3 more
doaj   +1 more source

Change of dominant material properties in laser perforation process with high-energy lasers up to 120 kilowatt

Scientific Reports, 2023
In laser materials processing, energy losses due to reflection, heat conduction and thermal radiation play an important role. In this publication, we show that with increasing laser intensity, the energy lost within the sample becomes less important for ...
Stefan Reich, Marcel Goesmann, Dominic Heunoske, Sebastian Schäffer, Martin Lueck, Matthias Wickert, Jens Osterholz   +6 more
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Continuous wave high-power laser propagation in water is affected by strong thermal lensing and thermal blooming already at short distances

Scientific Reports, 2021
When laser beams propagate through media with non-vanishing absorption, the media is heated resulting in a change of the refractive index, which can lead to thermal lensing and thermal blooming.
Stefan Reich, Sebastian Schäffer, Martin Lueck, Matthias Wickert, Jens Osterholz   +4 more
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Reinforcement-learning-based parameter adaptation method for particle swarm optimization

Complex & Intelligent Systems, 2023
Particle swarm optimization (PSO) is a well-known optimization algorithm that shows good performances in solving different optimization problems. However, the PSO usually suffers from slow convergence.
Shiyuan Yin, Min Jin, Huaxiang Lu, Guoliang Gong, Wenyu Mao, Gang Chen, Wenchang Li   +6 more
doaj   +1 more source

Research on Cumulative Deformation Characteristics of Subgrade Filling under Cyclic Train Loading

Shock and Vibration, 2022
The smoothness of high-speed railway is extremely strict. As an important part of the high-speed railway foundation, the subgrade structure has strict deformation requirements.
Junkai Yao, Yangsheng Ye, Degou Cai, Zongqi Bi, Hongye Yan   +4 more
doaj   +1 more source