Results 21 to 30 of about 280,732 (268)

Numerical simulation of failure of coal and rock blocks under different dynamic loads

open access: yesMeikuang Anquan, 2021
The numerical simulation of HJC constitutive model is carried out to analyze the dynamic changes of the stress field, strain field and energy field of coal and rock mass under dynamic loading process. The results show that the change of load change rate
FANG Shuhao, HUO Yujia, GUO Jinlin, BAI Zhipeng, BAO Qingfeng, ZHU Hongqing
doaj   +1 more source

Numerical and Field Investigations of Tremors Induced by Thick-Hard Strata Fracture

open access: yesApplied Sciences, 2022
Large energy mining-induced tremors are generally caused by the rupture of thick-hard overlying strata, and the roadway is prone to rockburst danger under its dynamic load.
Ying Guo   +3 more
doaj   +1 more source

Investigation of Dynamic Loading Software on an Aircraft's Wing and Horizental Tail, by Elevator Deflection [PDF]

open access: yesفناوری در مهندسی هوافضا, 2019
In this research, a dynamic simulator software has been designed to calculate the time varying load factor acting on an aircraft wing and on a horizontal tail relation to elevator deflection angle.
Morteza Bayati
doaj  

Strength Analysis of the Main Structural Component in Ship-to-Shore Cranes Under Dynamic Load

open access: yesIEEE Access, 2019
After a period of operation, the mechanical properties of ship-to-shore (STS) cranes can change. It is necessary to analyze the strength of the main structural component in STS cranes under dynamic load to assess their safety.
Gang Tang, Chen Shi, Yide Wang, Xiong Hu
doaj   +1 more source

Dynamic Load and Strength Determination of Carrying Structure of Wagons Transported by Ferries

open access: yesJournal of Marine Science and Engineering, 2020
A rapid development of economic relations between states has required an introduction of combined rail/ferry transportation. A feature of this type of transportation is the possibility of wagons traveling by sea on specially equipped ships—railway ...
Alyona Lovska   +3 more
doaj   +1 more source

Experimental Study of Prestressed Concrete Track Slab at Railroad Crossings

open access: yesJournal of Materials and Engineering Structures, 2022
Currently, the prestressed concrete track slabs are testing installed at the field to replace the reinforced concrete track slabs at railroad crossings in Vietnam. Prestressed concrete track slabs used for 1000 mm gauge.
Tran Anh DUNG, Le Hai HA
doaj  

Tests of Geometry of the Powered Roof Support Section

open access: yesEnergies, 2019
A powered roof support is a basic protection mean for longwall excavations in which highly efficient mining is carried out. The support operates properly when its individual sections are spragged correctly in a working and their operating parameters meet
Dawid Szurgacz, Jarosław Brodny
doaj   +1 more source

Dynamic Cost of Cooling, Heating and Power in Integrated Energy System Based on Exergy Economics

open access: yesZhongguo dianli, 2022
Cost allocation of integrated energy systems (IES) with multi-energy flow coupling is a key technical issue in the study of integrated energy services. Existing cost calculations of IES products do not take into account the effect of energy grade, and no
Jinbu LIAN   +5 more
doaj   +1 more source

Failure Pattern Transition of Shape Memory NiTi Foam Subjected to Compression: From Quasi-Static to Dynamic

open access: yesApplied Sciences, 2018
Shape memory alloy can recover its original configuration, while lightweight foam can absorb a considerable amount of energy. It is desirable to test whether shape memory foam has merits in terms of both shape memory effect and exceptional energy ...
Xiaojuan Wang, Hongyuan Zhou
doaj   +1 more source

Dynamic and Quasi-Static Loading Behavior of Low-Strength Concrete Incorporating Rubber Aggregates and Polymer Fiber

open access: yesApplied Sciences
This study evaluates low-strength concrete incorporating recycled rubber aggregates from waste tires and polymer fiber for use as “forgiving” safety barriers that enhance road safety while promoting environmental sustainability.
Amit Kenny, Ariel Amar, Dorith Tavor
doaj   +1 more source

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