Experimental investigation on dynamic mechanical characteristics and fracture mechanism of coal under repeated impact loads

2021 ◽  
Vol 14 (14) ◽  
Author(s):  
Kai Wang ◽  
Guorui Feng ◽  
Tingye Qi ◽  
Jinwen Bai ◽  
Yujiang Zhang ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Fracture Mechanism ◽  
Mechanical Characteristics ◽  
Impact Loads ◽  
Repeated Impact ◽  
Dynamic Mechanical

Dynamic mechanical characteristics and fracture mechanism of gas-bearing coal based on SHPB experiments

2020 ◽  
Vol 105 ◽  
pp. 102395 ◽  
Author(s):  
Xiangguo Kong ◽  
Enyuan Wang ◽  
Shugang Li ◽  
Haifei Lin ◽  
Zhibo Zhang ◽  
...  
Keyword(s):  
Fracture Mechanism ◽  
Mechanical Characteristics ◽  
Dynamic Mechanical ◽  
Gas Bearing

Experimental Investigation of the Shaft Dynamics of a Gas Turbine-Reciprocating Compressor Drive

1970 ◽  
Author(s):  
Omer Erdmann ◽  
John Horne
Keyword(s):  
Experimental Investigation ◽  
Gas Turbine ◽  
Mechanical Characteristics ◽  
Reciprocating Compressor ◽  
Dynamic Mechanical ◽  
Analytical Results ◽  
Asme Paper

A test was conducted to explore the dynamic mechanical characteristics of a gas turbine-reciprocating compressor system, to define its optimum running conditions, and to verify the analytical results presented in ASME Paper 68-WA/GT-4. This paper summarizes the results of that test.

scholarly journals Experimental investigation on reinforced concrete slabs strengthened with carbon textiles under repeated impact loads

2020 ◽  
Author(s):  
Baturay Batarlar ◽  
Marcus Hering ◽  
Franz Bracklow ◽  
Tino Kühn ◽  
Birgit Beckmann ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Reinforced Concrete ◽  
Concrete Slabs ◽  
Impact Loads ◽  
Repeated Impact ◽  
Reinforced Concrete Slabs

Rupture by impact-induced fatigue of a copper foil strip embedded in a multifunctional composite material

2021 ◽  
pp. 002199832199432
Author(s):  
Yacine Ouroua ◽  
Said Abdi ◽  
Imene Bachirbey
Keyword(s):  
Composite Material ◽  
Mechanical Characteristics ◽  
Glass Fibers ◽  
Energy Levels ◽  
Fatigue Tests ◽  
Repeated Impact ◽  
Aeronautical Industry ◽  
Repeated Impacts ◽  
Cracking Mode ◽  
The Impact

Multifunctional composite materials are highly sought-after by the aerospace and aeronautical industry but their performance depends on their ability to sustain various forms of damages, in particular damages due to repeated impacts. In this work we studied the mechanical behavior of a layered glass-epoxy composite with copper inserts subjected to fatigue under repeated impacts with different energy levels. Damage evolution as a function of impact energy was carefully monitored in order to determine the effect of the copper inserts on mechanical characteristics of the multifunctional composite, such as endurance and life. Results of repeated impact tests show that electric current interruption in the copper inserts occurs prior to the total perforation of the composite material, and after about 75% of the total number of impacts to failure. This is the case for the three energy levels considered in this study, [Formula: see text] = 2, 3 and 4 Joules. The epoxy resin was dissolved chemically in order to preserve the mechanical structure of the damaged copper inserts and the composite fibers for further inspection and analysis. Scanning electron microscopy (SEM) of the fractured copper inserts revealed interesting information on the nature of the damage, including information on plastic deformation, strain hardening, cracking mode, temperature increase during the impacts, and most importantly the glass fibers and their roles during the impact-fatigue tests.

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