Cutting Characteristics of Sugarcane in Terms of Physical and Chemical Properties

2020 ◽  
Vol 63 (4) ◽  
pp. 1007-1017
Author(s):  
Luxin Xie ◽  
Jun Wang ◽  
Shaoming Cheng ◽  
Dongdong Du
Keyword(s):  
Finite Element ◽  
Chemical Composition ◽  
Correlation Analysis ◽  
Finite Element Model ◽  
Physical Properties ◽  
Cutting Force ◽  
Single Point ◽  
Cutting Speed ◽  
Element Model ◽  
Cutting Process

HighlightsThe cutting mechanism of sugarcane stalks using single-point clamping was analyzed.Physical properties, chemical composition, and maximum cutting force of sugarcane were explored.Strong and complicated correlations between physical properties and chemical composition were established.Stress distributions in sugarcane stalks and the cutting blade were predicted using a finite element model.Abstract. Research on the cutting characteristics of sugarcane stalks is of great significance to improve harvest mechanization. In this study, perpendicular cutting of sugarcane stalks at six different nodes and internodes along the stalk was tested using a single-point clamping method at three cutting speeds (30, 40, and 50 mm min-1). The physical properties and chemical composition were also measured. At the 50 mm min-1 cutting speed, the maximum cutting forces at nodes and internodes upward along the stalk decreased gradually from 810 to 530 N and from 600 to 440 N, respectively. The maximum cutting force was positively correlated with the cutting speed at the same position. Differences in the microstructures of nodes, internodes, and epidermis were revealed by SEM micrographs. The physical properties and chemical composition of the stalks showed significant correlations. Correlation analysis was used to clarify the complicated interrelationships among these independent variables and revealed the interacting mechanism between physical properties and chemical composition. A finite element model was established to simulate the sugarcane cutting process. Results showed that the simulated cutting resistance of the blade was close to that in the experiments. The maximum Von Mises stress of the sugarcane stalk and blade in the cutting process were about 23.34 and 254.17 MPa, respectively. The results of this study provide guidance for designing and optimizing base-cutters of sugarcane harvesters and similar cutting equipment. Keywords: Chemical composition, Correlation analysis, Cutting characteristics, Microstructure, Physical properties, Simulation.

3D Finite Element Simulation for Turning of Hardened 45 Steel

2019 ◽  
Vol 13 (2) ◽  
pp. 181-188
Author(s):  
Meng Liu ◽  
Guohe Li ◽  
Xueli Zhao ◽  
Xiaole Qi ◽  
Shanshan Zhao
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Cutting Force ◽  
Finite Element Simulation ◽  
Orthogonal Experiment ◽  
Element Model ◽  
3D Finite Element ◽  
Element Simulation ◽  
Metal Machining ◽  
Single Factor Experiment

Background: Finite element simulation has become an important method for the mechanism research of metal machining in recent years. Objective: To study the cutting mechanism of hardened 45 steel (45HRC), and improve the processing efficiency and quality. Methods: A 3D oblique finite element model of traditional turning of hardened 45 steel based on ABAQUS was established in this paper. The feasibility of the finite element model was verified by experiment, and the influence of cutting parameters on cutting force was predicted by single factor experiment and orthogonal experiment based on simulation. Finally, the empirical formula of cutting force was fitted by MATLAB. Besides, a lot of patents on 3D finite element simulation for metal machining were studied. Results: The results show that the 3D oblique finite element model can predict three direction cutting force, the 3D chip shape, and other variables of metal machining and the prediction errors of three direction cutting force are 5%, 9.02%, and 8.56%. The results of single factor experiment and orthogonal experiment are in good agreement with similar research, which shows that the model can meet the needs for engineering application. Besides, the empirical formula and the prediction results of cutting force are helpful for the parameters optimization and tool design. Conclusion: A 3D oblique finite element model of traditional turning of hardened 45 steel is established, based on ABAQUS, and the validation is carried out by comparing with experiment.

The Study of Bone Cutting Force with FEM

2014 ◽  
Vol 974 ◽  
pp. 389-393 ◽  
Author(s):  
Sen Liu ◽  
Dong Mei Wu ◽  
Jun Zhao
Keyword(s):  
Finite Element ◽  
Cutting Force ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Element Model ◽  
Cutting Surface ◽  
On Line ◽  
Force Velocity ◽  
Optimization Of Cutting Parameters

In orthopedic surgery, it is easy to do harm to surrounding tissues, so the study of bone cutting is necessary. In this article, a finite element model (FEM) of orthogonal bone cutting is developed. Cutting force intra-operatively can provide the surgeon with additional on-line information to support him to control quality of cutting surface. The obtained cutting force decreased little with cutting speed increasing, but ascended evidently with cutting depth increasing. The results of finite element simulations are aimed at providing optimization of cutting parameters and the basic information for hybrid force-velocity control of a robot-assisted bone milling system.

scholarly journals Research on Finite Element Model Modification of Carbon Fiber Reinforced Plastic (CFRP) Laminated Structures Based on Correlation Analysis and an Approximate Model

Materials ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 2623 ◽  
Author(s):  
Yizheng Zhang ◽  
Yu’e Yang ◽  
Wenhao Du ◽  
Qing Han
Keyword(s):  
Finite Element ◽  
Correlation Analysis ◽  
Finite Element Model ◽  
Element Model ◽  
Approximate Model ◽  
Laminated Structure ◽  
Fiber Reinforced Plastic ◽  
Model Modification ◽  
Reinforced Plastic ◽  
Laminated Structures

Carbon fiber reinforced plastic (CFRP) laminated structures have been widely used in modern engineering due to their excellent material properties, especially in the aerospace and shipping industries. This requires a high-accuracy finite element model of CFRP laminated structures. However, it is difficult to master the mechanical properties of CFRP structures comprehensively and accurately due to influences from multiple aspects, such as dispersion of material properties, uncertainty of manufacturing technologies, etc. Therefore, a finite element model modification method of CFRP laminated structures based on correlation analysis and an approximate model was proposed. Aiming at minimizing the difference between the analysis model and the measured inherent frequency, the proposed method improves the finite element modeling accuracy of CFRP laminated structures, by iterative optimization based on a global optimization algorithm. In order to solve the problem of high spatial dimension and slow searching in modification of CFRP laminated structure models, the Pearson correlation analysis method was used to screen the material parameters which exert significant impacts on frequency characteristics to reconstruct the searching space. Based on significance parameters, an approximate response model of the CFRP laminated structural system was established. Meanwhile, the modeling accuracy of different orders of response surface models (RSM) and a radial basis function (RBF) neural network model was analyzed, and the best approximate modeling scheme was obtained. The approximate model was updated based on the multi-island genetic algorithm (MIGA) to modify the finite element model of the CFRP laminated structure model. The maximum error and mean error of the updated model are 1.47% and 0.45%. It was proved that the material parameters modified by the proposed method are applicable to simulation analysis of the CFRP laminated structure.

scholarly journals Analysis of Vibration of Roadheader Rotary Table Based on Finite Element Method and Data from Underground Coalmine

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Minjun Zhang ◽  
Fuyan Lyu ◽  
Xiushan Tang ◽  
Yang Yang ◽  
Xiaodong Ji ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Dynamic Properties ◽  
Single Point ◽  
Element Model ◽  
Rotary Table ◽  
Cutting Head ◽  
Cutting System ◽  
The Finite Element Model ◽  
Intense Vibration

The intense vibration of a roadheader rotary table damages the cutting system of the roadheader and reduces the efficiency. This paper analyzes the vibration of a rotary table by combining the finite element model with tested data from an underground coalmine. First, the force of the rotary table during the cutting procedure was analyzed, and the finite element model was built using Pro/E and ADAMS. The tested data were then imported into the model after selection, procession, and combination were conducted. Next, the six lowest-order parameters of the rotary table were calculated. A vibration analysis of the rotary table under certain working conditions was conducted, and the results were compared with those from a modal experiment using a single-point excitation method. According to the comparison between the simulation result and experiments, it is clear that this method is both reasonable and feasible. And it could supplement the theoretical foundation of the analysis of other roadheader components, providing reference for the improvement of the structure and dynamic properties of a roadheader. In addition, other vibration components of a roadheader such as the cutting head and the cutting arm could also be analyzed through the proposed method, with very reliable precision.

A Fractal Analysis of Cutting Force in Simulation and Experiment

2013 ◽  
Vol 589-590 ◽  
pp. 122-127 ◽  
Author(s):  
Guang Ming Zheng ◽  
Jun Zhao ◽  
Xin Yu Song ◽  
Xiang Cheng
Keyword(s):  
Fractal Dimension ◽  
Cutting Force ◽  
Fractal Analysis ◽  
Metal Cutting ◽  
Cutting Speed ◽  
Element Model ◽  
Cutting Process ◽  
Depth Of Cut ◽  
Practical Implementation ◽  
Mechanical Coupling

A 3D finite element model (FEM) of metal cutting was constructed based on the thermal-mechanical coupling theory. The cutting process of Sialon ceramic tools turning Inconel 718 was simulated and experimented. The effect of cutting speed, feed rate and depth of cut on the cutting force was analyzed. According to the correlation characteristics between the data points, the fractal characteristics of cutting forces in the cutting process were also investigated. The results showed that the cutting speed had a great effect on the fractal dimension of cutting force. The simulation results were in good agreement with the experimental findings. It was concluded that the minimum fractal dimension of cutting force was obtained at v=230 m/min under these experiment conditions. The fractal analysis is a simple and powerful tool for quantifying the stability of cutting process. The finding of this research is valuable for future practical implementation.

Simulation and Study on the Formation Mechanism of Chip Based on Micro Cutting

2016 ◽  
Vol 679 ◽  
pp. 103-106 ◽  
Author(s):  
Qi Ding Li ◽  
Ke Tian Li ◽  
Hai Min Li
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Cutting Force ◽  
Formation Mechanism ◽  
Element Model ◽  
Cutting Mechanism ◽  
Cutting Depth ◽  
Micro Cutting ◽  
Model Based ◽  
Simulation Results

A finite element model based on Abaqus/Explicit is built. Micro cutting mechanism of Al7075 with different cutting depth is simulated and analyzed. The simulation results show that if the cutting depth is more than 10μm, the chip is a kind of continuous curl. If the cutting depth is less than 10μm, the chip is a kind of feathery squeeze debris. When the cutting depth is very small (3μm), the shape of chips is just like discontinuous wrinkle. By contrasting the simulation results of cutting force with its theoretical values, they have the same result. The model of the chip prediction could achieve ideal simulation results.

Cutting performance investigation based on the variable friction model by considering sliding velocity and limiting stress

2020 ◽  
Vol 234 (8) ◽  
pp. 1113-1123
Author(s):  
Xin Li ◽  
Zhenyu Shi ◽  
Ningmin Duan ◽  
Peng Cui ◽  
Shuai Zhang ◽  
...  
Keyword(s):  
Finite Element ◽  
Friction Coefficient ◽  
Finite Element Model ◽  
Cutting Force ◽  
Element Model ◽  
Friction Model ◽  
Rake Face ◽  
Sliding Velocity ◽  
Variable Friction ◽  
Simulation Results

Fast and accurate cutting force prediction is still one of the most complex problems and challenges in the machining research community. In this study, a modified finite element model is presented to predict cutting force and cutting length in turning operations of AISI 1018. Unlike the existing research, in which the mean friction coefficient μ was taken, a variable friction coefficient μ involving the sliding velocity between chip and tool is presented in this article. The sticking–sliding friction model is adopted, and the maximum limiting stress in sticking region is calculated by considering the thermal softening and normal stress distribution. Experiments have been performed for machining AISI 1018 using tungsten carbide tool, and simulation results have been compared to experiments. The simulation results of the modified finite element model have shown better outputs in predicting cutting force, tangential force, and tool–chip contact length on the rake face. The results of this article not only are meaningful to optimize tool design and cutting parameters but also can provide a clear understanding of contact behavior between tool rake face and chip.

Simulation and Modeling Method for Micro Turn-Milling Cutting Process

2012 ◽  
Vol 190-191 ◽  
pp. 182-186
Author(s):  
Zeng Wu Zhao ◽  
Xin Jin ◽  
Zhi Jing Zhang ◽  
Xu Yao Sun ◽  
Yong Jun Deng
Keyword(s):  
Cutting Force ◽  
Cutting Speed ◽  
Element Model ◽  
Modeling Method ◽  
Cutting Process ◽  
Machining Accuracy ◽  
Simulation And Modeling ◽  
Accuracy Control ◽  
Experiment Verification ◽  
Turn Milling

A simulation and modeling method for micro turn-milling cutting process was investigated to predict the impacts of cutting speed and cutting depth on cutting force. Based on material Johnson-Cook constitutive model and chip separation criteria, the finite element model was established in ABAQUS simulation application, then the model analysis and experiment verification was conducted. The results indicate that the simulation model can predict the value and regularity of cutting force, which can provide guidance on process optimization and machining accuracy control.

Finite Element Simulation of Nickel-Based Alloy Cutting Process Based on DEFORM- 3D

2011 ◽  
Vol 175 ◽  
pp. 352-356 ◽  
Author(s):  
Jia Long Ren ◽  
Chun Yan Zhang ◽  
De Peng Yuan
Keyword(s):  
Heat Transfer ◽  
Finite Element ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Cutting Force ◽  
Cutting Temperature ◽  
Cutting Speed ◽  
Cutting Process ◽  
Average Temperature ◽  
Deform 3D

To analysis cutting mechanism and heat transfer coefficient of Ni-based superalloy IN718, this paper introduced a three-dimensional finite element model for cutting process based on DEFORM-3D V6.1, and cutting force Fy and cutting temperature T under different feed rate f , cutting speed v and back engagement ap were obtained. The temperature variation during cutting process under different cooling method was analyzed. The simulation results indicate that the influence of back engagement ap on the cutting force Fy is the greatest, while that of cutting speed v is minor; and for cutting temperature T, influence of cutting speed v is the greatest, while that of back engagement ap is minor. Influence of heat transfer coefficient on highest temperature and average cutting force Fy is minor, but its influence on average temperature is quite obvious. Greater heat transfer coefficient is less average temperature.

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