Results 21 to 30 of about 249,201 (263)

Reconstruction of a Rollover Crash for Thoracic Injury Etiology Investigation

Safety, 2017
The cause of serious and fatal thoracic injuries in passenger vehicle rollover crashes is currently not well understood. Previous research on thoracic injuries resulting from rollover crashes have focused primarily on statistical analysis of crash data ...
Tana Tan, Mario Mongiardini, Raphael Grzebieta, Garrett Mattos   +3 more
doaj   +1 more source

Effects of deflection angle on the mechanical properties of constant-resistance, energy-absorbing, and anti-scouring bolts

Frontiers in Earth Science, 2023
In practice, constant-resistance, energy-absorbing, and anti-scouring bolts inevitably deflect at an angle from the coal wall and other bearing surfaces, eventually giving way and losing their energy-absorbing function.
Zhi Tang, Hao Wu, Jinguo Lv, Dezhi Chang
doaj   +1 more source

Research on Dynamic Mechanical Properties and Constitutive Model of Basalt Fiber Reinforced Concrete after Exposure to Elevated Temperatures under Impact Loading

Applied Sciences, 2020
The dynamic mechanical properties of basalt fiber reinforced concrete (BFRC) with different fiber contents (0.0%, 0.1%, 0.2%, 0.3%, 0.4%), confining pressures (0 MPa, 5 MPa, 10 MPa, 15 MPa) and exposed to different temperatures (20 °C, 200 °C, 400 °C ...
Wenbiao Liang, Junhai Zhao, Yan Li, Yue Zhai, Zhou Wang, Yubing Yang   +5 more
doaj   +1 more source

Investigation of Mechanical Properties of Notched Samples Manufactured by Additive Manufacturing Method Under Different Impact Velocities

Havacılık ve Uzay Teknolojileri Dergisi, 2021
Fused Filament Fabrication (FFF), which is one of the additive manufacturing methods, has recently found industrial usage areas and has become frequently used.
Mumin Tutar
doaj  

Effect of dynamic load and water content on failure and energy dissipation characteristics of red sandstone

Rock and Soil Mechanics, 2022
Dynamic load and groundwater have a significant influence on the safety and stability of engineering rock mass during underground blasting excavation. In order to study the influence of dynamic load and water content on the failure and energy dissipation
JIN Jie-fang, XU Hong, YU Xiong, LIAO Zhan-xiang   +3 more
doaj   +1 more source

Velocity equation for grenades while impacting on dry sand media

Defence Technology
This paper deals with the collision of sphere shape grenades with sand media. The central issue of the article is the establishing of an empirical velocity equation of the grenade while impacting on sand that is used to solve motion equations of the ...
Martin Macko, Xuan Son Bui, Kongsathit Phanthavong, Duc Hung Pham, Van Gion Do, Van Minh Do, Jiri Skala   +6 more
doaj   +1 more source

Study on Rock-Breaking Mechanisms of Multi-Dimensional Impact Cutting Based on PDC Cutter Numerical Simulation

Shiyou jixie, 2023
The development and application of the torsional impact drilling model improve the efficiency of breaking rocks along the wellbore circumference.To enhance the rock-breaking efficiency of the compound impact drilling and the optimal torsional-axial ...
Qi Yue, Liu Gonghui, Li Jun, Zha Chunqing, Tian Yudong, Li Yumei   +5 more
doaj  

Personalized Zebrafish Models for Fusion‐Positive Pediatric Sarcomas

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Clinical sequencing efforts have revolutionized our approaches to categorizing pediatric cancers in real time. This has dramatically improved our ability to profile pediatric tumors, identify actionable vulnerabilities, and influence clinical care.
Lisa H. Hall, Emma N. Harrison, Genevieve C. Kendall   +2 more
wiley   +1 more source

Rock Breaking Analysis and Process Parameter Optimization of Pneumatic DTH Hammer Bit

Shiyou jixie, 2022
In order to improve the rock-breaking efficiency and penetration ability of pneumatic DTH hammer in hard strata, based on the theory of nonlinear contact dynamics, the ABAQUS software was used to build a piston-pneumatic DTH hammer bit-rock(granite ...
Wang Shenglin, Wei Qinwen, Liu Chengjun, Deng Yinjiang, Zhang Shiming, Xiao Xinyuan   +5 more
doaj  

A Comprehensive Study on the Deformation Behavior of Hadfield Steel Sheets Subjected to the Drop Weight Test: Experimental Study and Finite Element Modeling

Metals, 2018
This work presents the results of experimental and finite element modeling studies of impact behavior on the response of a high content of manganese steel blanks with a 1.2 mm thickness of sheets, known also commercially as Hadfield steel (an austenitic ...
Halil Murat Enginsoy, Emin Bayraktar, Ali Kurşun   +2 more
doaj   +1 more source