Heat and Mass Transfer Finite Element Simulation of Clay Ceramic Prototype in High-Temperature Drying

2011 ◽  
Vol 128-129 ◽  
pp. 1147-1150
Author(s):  
Fei Meng ◽  
Hai Ou Zhang ◽  
Gui Lan Wang ◽  
Xue Cheng Ping
Keyword(s):  
Mass Transfer ◽  
Finite Element ◽  
High Temperature ◽  
Finite Element Simulation ◽  
Heat And Mass Transfer ◽  
Ceramic Materials ◽  
Industrial Robots ◽  
Clay Material ◽  
Element Simulation ◽  
High Temperature Drying

In the DPST (Direct Prototype Spray Tooling) sprayed directly prototype tooling technology of Huazhong University of Science and Technology , due to brittle characteristics of ceramic materials, there was low efficient in the processing of large mold .The study would obtain sprayed ceramic prototypes through Industrial robots directly milling of ceramic rough technology, However, clay ceramic prototype embryos after milling would occur large shrinkage in the high-temperature drying and consolidation. In the paper it has established a clay material mathematical model of heat and mass transfer in the high-temperature drying process, and carried out finite element simulation in the ABAQUS, obtained shrinkage deformation law of the clay material.

Physical Simulation of Cutting Process and Optimization of Cutting Parameters

2012 ◽  
Vol 522 ◽  
pp. 210-216
Author(s):  
Tian Biao Yu ◽  
Xue Wei Zhang ◽  
Jia Ying Pei ◽  
Wan Shan Wang
Keyword(s):  
Finite Element ◽  
High Temperature ◽  
Cutting Force ◽  
Finite Element Simulation ◽  
Physical Simulation ◽  
Cutting Parameters ◽  
Cutting Process ◽  
Finite Element Software ◽  
Element Simulation ◽  
Optimization Of Cutting Parameters

Based on metal cutting theory and the key technology of finite element simulation, this paper uses finite element software Deform to establish three-dimensional finite element simulation model and simulate cutting process. This paper uses the work piece material is IN718 high temperature alloys packaged in Deform, and analyzes the processing characteristics of high temperature, choosing the right tools and cutting dosages to simulate. Through the simulation we can get scraps forming process, the surface stress, strain, temperature and cutting force distribution of the workpiece and the tool. We can also get the change rule of cutting force and cutting temperature under the different cutting parameters. The simulation results provide the theoretical basis for the optimization of cutting parameter selection in production practice.

Finite Element Simulation Model for High Temperature 4H-SiC Devices

2011 ◽  
Vol 413 ◽  
pp. 229-234 ◽  
Author(s):  
Hassan Habib ◽  
Nicolas G. Wright ◽  
Alton B. Horsfall
Keyword(s):  
Finite Element ◽  
High Temperature ◽  
Simulation Model ◽  
Finite Element Simulation ◽  
Computer Aided Design ◽  
High Performance ◽  
Extreme Environments ◽  
Simulation Models ◽  
Trade Offs ◽  
Element Simulation

In the last decade, or so, many prototype Silicon Carbide devices and circuits have been demonstrated which have surpassed the performance of Silicon for the ability to function in extreme environments. However, the commercialisation of SiC technology now demands high performance and energy efficient miniaturised devices and circuits which can operate on the limited power resources available in harsh and hot hostile environments. This leads to refining, experimenting and perhaps re-designing devices which can rightly claim their share in the current Si dominant market. Consequently, there is a need for accurate simulation models for device engineers to understand device behaviour, examine performance trade-offs and verify the manufacturability of the design. This paper reports the first comprehensive study on the development and validation of high temperature 4H-SiC Technology Computer Aided Design (TCAD) Finite Element simulation model for low power applications. The model is based on 4H-SiC physical and material properties and is validated by high temperature 4H-SiC lateral JFET data, fabricated and characterised by our group at Newcastle University.

Finite Element Simulation of Limit Load of Components at High Temperature

2011 ◽  
Vol 704-705 ◽  
pp. 1291-1297
Author(s):  
Jian Peng ◽  
Chang Yu Zhou ◽  
Ji Lin Xue ◽  
Xiao Hua He ◽  
Qiao Dai
Keyword(s):  
Finite Element ◽  
High Temperature ◽  
Finite Element Simulation ◽  
Working Hours ◽  
Limit Load ◽  
Total Strain ◽  
Sustained Load ◽  
Element Simulation ◽  
Cumulative Strain ◽  
Strain Data

The creep of materials makes it difficulty to determine the limit load of component at high temperature. In this paper, limit load was obtained by finite element simulation according to isochronous stress versus cumulative strain data and creep failure criterion at high temperature. Firstly, isochronous stress versus cumulative strain data of P91 steel was generated. In finite element analysis code ABAQUS, isochronous stress versus cumulative strain data was replaced by equivalent elastic-plastic constitutive relation. Then, sustained load versus cumulative strain curves at high temperature during service was obtained after finite element simulation. At last, limit load at high temperature during given working hours was determined based on the restriction of total strain at key point of specific component. The restriction of total strain which could also be regarded as long-term fracture strain was discussed in this paper. Finite element simulation of limit load of component at high temperature is simple and reasonable. Limit load of complex component at high temperature during given working hours can be obtained by this method. Using this method, limit loads of a pipe with local wall thinning defect and a branch junction at high temperature during given working hours were obtained as examples.

The finite element simulation of high-temperature magnesium AZ31 sheet forming

JOM ◽  
2009 ◽  
Vol 61 (8) ◽  
pp. 29-37 ◽  
Author(s):  
Ravi Verma ◽  
Louis G. Hector ◽  
Paul E. Krajewski ◽  
Eric M. Taleff
Keyword(s):  
Finite Element ◽  
High Temperature ◽  
Finite Element Simulation ◽  
Sheet Forming ◽  
Element Simulation ◽  
Az31 Sheet ◽  
Magnesium Az31
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