Results 51 to 60 of about 87,249 (169)

Experimental Testing of Burglar Resistance of Fenestration [PDF]

, 2019
Currently, windows and glass facades are increasingly being used as a building envelope. These are elements that are functional and aesthetic, but there is a need to focus on their safety.
Figuli, Lucia, Jankura, Richard
core   +1 more source

Static Analysis of Gelatin-like Simulation Mass as a Subsoil in Scale Physical Modeling

Buildings
The investigation of wave propagation in the geological environment is warranted, and will ultimately help to provide a better understanding of the response of subsoil to excitation.
Veronika Valašková, Jozef Vlček
doaj   +1 more source

Thirty years of SN 1980K: Evidence for light echoes [PDF]

, 2012
We report optical and mid-infrared photometry of SN 1980K between 2004 and 2010, which show slow monotonic fading consistent with previous spectroscopic and photometric observations made 8 to 17 years after outburst.
Andrews, Jennifer E., Barlow, Michael J., Clayton, Geoffrey C., Ercolano, Barbara, Ghavamian, Parviz, Kennicutt Jr., Robert C., Krause, Oliver, Meixner, Margaret, Otsuka, Masaaki, Sugerman, Ben E. K.   +9 more
core   +1 more source

Test study on impact resistance of hydraulic support based on energy-absorbing material

Meikuang Anquan
The application of energy-absorbing material on the top beam of the hydraulic support can effectively improve its impact resistance under instantaneous dynamic loading.
Shiwei LI, Yajun XU, Jie ZHOU, Shangyu DU, Xiaoliang PANG, Sai ZHANG   +5 more
doaj   +1 more source

Transient Response of an Impacted Beam and Indirect Impact Force Identification Using Strain Measurements

Shock and Vibration, 1994
The impulse response functions (force-strain relations) for Euler–Bernoulli and Timoshenko beams are considered. The response of a beam to a transverse impact force, including reflection at the boundary, is obtained with the convolution approach using ...
Hyungsoon Park, Youn-sik Park
doaj   +1 more source

Dynamics of drop impact on solid surfaces: evolution of impact force and self-similar spreading

, 2017
We investigate the dynamics of drop impacts on dry solid surfaces. By synchronising high-speed photography with fast force sensing, we simultaneously measure the temporal evolution of the shape and impact force of impacting drops over a wide range of ...
Cheng, Xiang, Gordillo, Leonardo, Sun, Ting-Pi   +2 more
core   +1 more source

Behavior of stainless steel–reinforced concrete piers under lateral impact loading

Advances in Mechanical Engineering, 2017
In this study, stainless steel bars with the same diameter were used to replace ordinary stressed steel bars in reinforced concrete bridge piers. An ultra-high drop hammer impact test system was adopted for multiple horizontal impact tests on two groups ...
Guoxue Zhang, Shixiang Xu, Hongbing Xie, Xiwu Zhou, Yingfeng Wang   +4 more
doaj   +1 more source

Study on the effect of RDX content on the properties of nitramine propellant

Defence Technology, 2017
Four kinds of nitroamine propellants with different RDX contents (10%, 20%, 30% and 40%) were prepared to study the effect of RDX content on the mechanical properties and combustion properties of nitroamine propellant.
Fen ZHANG, Deng-pan ZHU, Qiong LIU, Zhi-tao LIU, Ping DU   +4 more
doaj   +1 more source

An Experimental Study of the Feasibility of Identifying the Impact Damages of Reinforced Concrete Piers Using a Modal Frequency Method

Advances in Civil Engineering, 2020
In this research study, horizontal impact tests were carried out on five reduced scale pier models using China’s most advanced multifunctional ultrahigh heavy drop hammer impact test system and DHDAS dynamic signal acquisition and analysis system. Due to
Xiwu Zhou, Wenchao Zhang, Yushen Gao, Guoxue Zhang, Mengdan Wen   +4 more
doaj   +1 more source

Experimental study on compression mechanical characteristics of filled rock joints after multiple pre-impacts

Scientific Reports, 2022
The prefabricated artificial filled jointed rock specimens are impacted by a self-made drop hammer impact device for many times, and the specimens with different degrees of cumulative damage characteristics are obtained.
Shaobo Chai, Yongsheng Jia, Yuxiang Du, Bo Hu, Xianpeng Li   +4 more
doaj   +1 more source