Results 1 to 10 of about 1,771,068 (212)

Research on Tail Rotor Load Test Flight Technology for Helicopters Based on Strain Sensor Measurement [PDF]

open access: yesSensors
The load characteristics of the helicopter tail rotor system are critical to flight safety and handling performance, and flight testing remains the most direct and reliable means to obtain authentic load data.
Shuaike Jiao   +3 more
doaj   +2 more sources

Research on Rock Strength Test Based on Electro-Hydraulic Servo Point Load Instrument

open access: yesApplied Sciences, 2022
A new electro-hydraulic servo point load instrument was designed to address the problem that the existing point load instrument cannot be loaded continuously and uniformly; different loading rates (using three loading rates: 0.1, 0.5, 1.0 kN/s) were ...
Xiaoxia Zhou   +5 more
doaj   +3 more sources

Strength Assessment of Steel Fibre Reinforced Recycled Aggregate Concrete by Means of Correlation between Ultrasonic and Point Load Tests [PDF]

open access: yesJournal of Rehabilitation in Civil Engineering, 2022
This paper aimed at assessing the in-situ strength of steel fibre reinforced concrete containing recycled coarse aggregate (RCA) using the correlation between ultrasonic and point load tests.
Hossein Razzaghi   +2 more
doaj   +1 more source

Study on static load test of modified and extended rigid frame bridge [PDF]

open access: yesE3S Web of Conferences, 2021
In order to evaluate the mechanical condition and working performance of a rigid frame bridge after reconstruction and extension, the mechanical performance of the bridge was analyzed by static load test.
Yu-feng NING   +3 more
doaj   +1 more source

Determining the strength index of coal from the Brod - Gneotino deposit, Bitola [PDF]

open access: yesMining and Metallurgy Engineering Bor, 2018
The Point Load Test (PLT) was performed in the geomechanical laboratory of the MMI Bor, in order to determine the strength index of coal samples from the Brod - Gneotino, Bitola, Republic of Macedonia. On the basis of the obtained results, it is possible
Tašić Dušan   +2 more
doaj   +1 more source

Tensile strength test of coal and rock with different coal structure

open access: yesGong-kuang zidonghua, 2021
Coal and rock, as a special sedimentary rock, mostly undergoes multiple phases of tectonic movements after its formation, resulting in the diversity of coal structures.
HUANG Kai,   +3 more
doaj   +1 more source

Effect of layer number on bending behavior of 3D spacer composite plates produced with different methods

open access: yesFirat University Journal of Experimental and Computational Engineering, 2022
In this study, the three-point bending behavior of laminated composite plates reinforced with three-dimensional (3D) spacer fabric was experimentally investigated.
Mustafa Gür   +2 more
doaj   +1 more source

Research on the Conversion Relationship between Dynamic Point Load Strength and Dynamic Compressive Strength Based on Energy System

open access: yesShock and Vibration, 2022
Point load test is a simple and fast method to obtain the compressive strength of rock. According to the maximum load at failure and the distance between two cone ends, the compressive strength of specimens can be calculated by the empirical formula ...
Ming Zhou   +4 more
doaj   +1 more source

Research on evaluation method of bearing capacity of existing bridge based on static load test [PDF]

open access: yesE3S Web of Conferences, 2021
The author carried out static load test research on a prestressed concrete rigid frame bridge. Under the action of static load, the most unfavorable section JM3 on the beam body was measured.
Yang Qingcheng   +3 more
doaj   +1 more source

Distribution characteristics of the point load strength index of irregular ore rock samples in deep mines

open access: yes工程科学学报, 2023
The frequent occurrence of core disking in boreholes under high in-situ stress in deep rock engineering leads to the difficulty in intact core sampling on sites.
Di-yuan LI   +4 more
doaj   +1 more source

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