Smooth particle hydrodynamics study of surface defect machining for diamond turning of silicon

Mir, Amir Sarwar; Luo, Xichun; Siddiq, M.

doi:10.1007/s00170-016-8940-6

Cited by 35 publications

(13 citation statements)

References 53 publications

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“…The compressive yield strength of silicon is higher compared to its tensile strength [30] which is an elementary criterion of using DP model. Table 3 lists the material properties and DP model parameters of silicon [31] used in SPH cutting simulation.…”

Section: Sph Cutting Simulation Modelmentioning

confidence: 99%

Investigation of influence of tool rake angle in single point diamond turning of silicon

Mir

Luo

Cheng

et al. 2017

Int J Adv Manuf Technol

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This paper presents an investigation of the effect of tool rake angle in single point diamond turning (SPDT) of silicon using experimental and simulation methods. Machining trials under the same cutting conditions were carried out using three different rake angle tools. In order to delve further into the rake angle effect on the output parameters including material removal, stresses and crack formation, at the onset of chip formation and steady-state conditions, a simulation study using smoothed particle hydrodynamics (SPH) approach was performed. The simulation results were incorporated and found in good agreement with experimental observations. The results indicate that diamond tool wear rate and surface generation mechanism significantly vary using different rake angle tools. The continuance of compressive and shear deformation sequence at the chip incipient stage governs the high-pressure phase transformation (HPPT) as a function of rake angle and tool wear. The capability of diamond tool to maintain this sequence and required hydrostatic pressure under worn conditions is highly influenced by a change in rake angle. The proportional relationship of cutting force magnitude and tool wear also differs owing to disparate wear pattern which influence distribution of stresses and uniform hydrostatic pressure under the tool cutting edge. This subsequently influences structural phase transformation and therefore frictional resistance to cutting. Mainly frictional groove wear was found dominant for all diamond tools in machining of silicon.

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Section: Sph Cutting Simulation Modelmentioning

confidence: 99%

Investigation of influence of tool rake angle in single point diamond turning of silicon

Mir

Luo

Cheng

et al. 2017

Int J Adv Manuf Technol

Self Cite

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“…The farmlands in southern China have complex rheological and creep properties which can be simulated by extended Drucker-Prager (D-P) model in ABAQUS. With a non-circular yield surface on π plane [19][20], the extended D-P model can simulate the real stretch status in three different axial. Besides, the setup model takes into consideration other factors, such as the creeping property and shear dilatancy of the soil, as shown in Fig.…”

Section: Modeling Of the Soilmentioning

confidence: 99%

Optimization of Gait Parameters for Energy Efficiency Improvement of Farmland Robot Based on Orthogonal Experiment Design

et al. 2019

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In order to improve the energy efficiency of legged robots while walking on farmland, a simulation system of legged robot on farmland soil was put forward in this paper. Firstly, the finite element model of the interaction between the robot leg and the farmland soil was established, and the multi-body dynamics and the foot-ground interaction simulation were carried out in one gait cycle. Secondly, the orthogonal experiment with four factors was established to analyze the external energy required for the robot leg to walk in the soil. Then the range analysis and variance analysis of the results were carried out to optimize the energy consumption ratio. The influence of the four factors on the experimental results and the optimal gait parameters and foot structure were obtained subsequently. Finally, the no-load walking experiment in the selfdeveloped soil-bin test-bed was carried out with the optimal gait and foot structure. The results demonstrate that the successive order of factors affecting the energy consumption ratio is foot structure, stride length, gait cycle time and stride height. The process of penetrating the soil consumes the most energy in a gait cycle. The optimization design of the foot structure and the penetration process is helpful to reduce the energy consumption of the farmland robot.

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“…In the analysis using the discrete element method, the effect of different disc hobs on the rock crushing effect is mainly studied, which is used to accurately describe various parameters of the rock and predict the force of the tools under different rocks [9]- [13]. Both the tipped hob and the disc hob are crushed by the cutter to break the rock, but unlike the disc hob which causes continuous damage on the rock surface, the tipped hob causes discontinuous damage.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Numerical Simulation of Rock Breaking by the Tipped Hob Cutter Based on Explicit Finite Element

Liu

et al. 2019

IEEE Access

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As an important equipment for wellbore construction, the raise boring machine (RBM) has been widely used in subway tunnels and mine construction projects. Its tipped hob cutter for rock breaking is directly related to the cost, safety, and overall performance of the project. However, few open studies research on the rock-breaking by the tipped hob cutter, and there is still a lack of enough understanding of how the cutter breaks rock and the form of the rock breaking. In this paper, we study how the tipped hob cutter breaks the rock, and how to establish the finite-element model of the rock breaking by the cutter, with using the numerical simulation software LS-DYNA to analyze the rolling process and rock fracture form of the cutter. By studying the fracture morphology of rocks, it is proposed that there are three fracture modes of rock breaking: forward slip, no slip, and backward slip, using the experimental verification. On this basis, study the variation laws and correlations of feed force, lateral force, and positive force under different moving speeds and penetration depths. The results in this paper can provide a theoretical basis for improving the tool design of the tipped hob cutter on the RBM against the efficiency of rock-breaking. INDEX TERMS Tipped hob cutter, raise boring machine, rock fragmentation, slip crushing, numerical simulation. The associate editor coordinating the review of this manuscript and approving it for publication was Jiansong Liu.

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Smooth particle hydrodynamics study of surface defect machining for diamond turning of silicon

Cited by 35 publications

References 53 publications

Investigation of influence of tool rake angle in single point diamond turning of silicon

Investigation of influence of tool rake angle in single point diamond turning of silicon

Optimization of Gait Parameters for Energy Efficiency Improvement of Farmland Robot Based on Orthogonal Experiment Design

Three-Dimensional Numerical Simulation of Rock Breaking by the Tipped Hob Cutter Based on Explicit Finite Element

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