Finite element analysis of nozzle selection based on high pressure water jet technology

In this paper, we integrated use hydraulics, seepage flow mechanics, rock mechanics, and finite element simulation analysis and other methods to study the rock fragmentation mechanism of high pressure water jet. We make tensile stress - crack expansion comprehensive rock fragmentation model for the screw drilling of high pressure water jet. We make finite element simulation according to the mechanism of integrated model of high pressure water jet process, to analysis the internal rock stress distribution and external rock stress distribution of the fluid, and come to the reasonable number of high-pressure water jet nozzle hole. It is verified by the high pressure water jet breaking rock inside experiments of tensile stress - comprehensive rock fragmentation fracture expansion model, summarizes the law of high pressure water jet breaking rock, and we get to know reasonable drilling mode of the high pressure water jet is screw drilling with pitch of 120mm. At present there are two main types of the micro mechanism of the high pressure water jet. One is stress and tensile damage, because of the action produced by stress wave of the high pressure water jet impacting on rock, which mainly makes the tensile failure of rock; another one is crack expansion damage, under the effect of quasi static pressure radiation of water jet, the coupling effect between water shooting jet and rock pore skeleton, which make the rock pore, throat, and micro cracks expanding gradually, eventually the macro damage.

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Finite element analysis of rock breaking experimental bench of high pressure water fracturing assisted pick

10.1117/12.2625310 ◽

2021 ◽

Author(s):

Yuliang Sun ◽

Qiang Zhang

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

High Pressure ◽

Rock Breaking ◽

Element Analysis ◽

Pressure Water ◽

Experimental Bench

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Fatigue Simulation of High Pressure Water Jet Cylinder

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.538-541.909 ◽

2012 ◽

Vol 538-541 ◽

pp. 909-914

Author(s):

Kun Wang ◽

Deyi Ma ◽

Yue Gan Song

Keyword(s):

High Pressure ◽

Water Jet ◽

The Body ◽

High Pressure Cylinder ◽

Element Analysis ◽

Water Jet Cutting ◽

Pressure Cylinder ◽

Pressure Water ◽

Water Cutting ◽

High Pressure Water Jet

The development of abrasive water jet cutting technology needs much higher reliability requirements of water cutting system. As one of the core parts in pressure generating system of water jet cutting, the High-pressure cylinder should have a stable fatigue life. The materials of the high-pressure cylinder are 34CrNi3MoA and AISl4340, and the stress of it under high pressure conditions was analyzed with the finite element analysis software ANSYS. For the existence of repeated plastic strain, the fatigue curves were gat by long-life theory. At last the fatigue of the high-pressure cylinder was simulated based on the stress. The results show that the stress is in distribution of 29MPa - 699MPa, and main of the body is under elastic strain. The whole fatigue condition can meet the requirements, but fatigue situation is worse in close to high pressure check export, the minimal life is 250000 cycle indexes.

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Finite element simulation of high-pressure water-jet assisted metal cutting

International Journal of Mechanical Sciences ◽

10.1016/s0020-7403(03)00142-5 ◽

2003 ◽

Vol 45 (6-7) ◽

pp. 1201-1228 ◽

Cited By ~ 17

Author(s):

Chandrakanth Shet ◽

Xiaomin Deng ◽

Abdel E. Bayoumi

Keyword(s):

Finite Element ◽

High Pressure ◽

Finite Element Simulation ◽

Metal Cutting ◽

Water Jet ◽

Element Simulation ◽

Pressure Water ◽

High Pressure Water Jet

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The Model Analysis of Molding Sand’s Removal and Mechanism Research Using High Pressure Water-Jet Technique

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.16-19.1127 ◽

2009 ◽

Vol 16-19 ◽

pp. 1127-1132 ◽

Cited By ~ 1

Author(s):

Ji Gao ◽

Rui Zhang ◽

Guo Qiang Cao ◽

Gui Mu Zhang

Keyword(s):

High Pressure ◽

Stress Wave ◽

Damage Model ◽

Water Jet ◽

Test Results ◽

Element Analysis ◽

Molding Sand ◽

Mechanism Research ◽

Pressure Water ◽

High Pressure Water Jet

This paper studies the mechanism and process simulation of removal of molding sand by a high pressure water jet using a nonlinear dynamic damage model and finite element analysis (FEA). The results indicate that a high pressure water jet possesses a strong ability to remove molding sand. The destruction of molding sand is a concurrent result of stress wave and quasi-static pressure, in which the alterative stress wave plays a major role. The numerical results agree with the test results, indicating that the model and FEA are feasible for analyzing the mechanism and process of removal of molding sand by a high pressure water jet. These conclusions can be used for equipment design and process optimization of removal of molding sand for precision castings.

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Research on Effects of Accuracy in Variable Loading on the High-Pressure Water Jet Incremental Forming

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.774-776.1021 ◽

2013 ◽

Vol 774-776 ◽

pp. 1021-1025 ◽

Cited By ~ 1

Author(s):

Ling Yun Zhang ◽

Li Nie

Keyword(s):

Finite Element ◽

High Pressure ◽

Finite Element Simulation ◽

Incremental Forming ◽

Water Pressure ◽

Water Jet ◽

Layered Manufacturing ◽

Element Simulation ◽

Pressure Water ◽

High Pressure Water Jet

High-pressure Water Jet Increment Sheet Metal Forming adopt the idea of layered manufacturing to scatter a complex three-dimension shape to many 2-dimension layers along z axis, and then the water jet machine partially on these layers. We did a research on that the distance from square processing trajectory to center and the water pressure affect the limits of forming height by finite element simulation of high-pressure water jet box-shape piece incremental forming with the thought of layered manufacturing. Based on this, puts forward a new method of different 2-dimension layers is loaded on different water pressure to improve water jet incremental forming accuracy. This method was proved feasibility by finite element simulation.

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