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Correlation between Single Factor material constitutive model Parameters and Temperature for Ti6Al4V Alloy

Chinese Journal of Mechanical Engineering 2010年第5期23卷 574-581页

作者： YANG Yong LI Jianfeng SUN Jie Department of Mechanical Engineering Qingdao Technological University Qingdao 266033 China Department of Mechanical Engineering Shandong University Jinan 250061 China

Accurate material constitutive model is considered highly necessary to perform finite element simulation and ***,it is difficult to establish the material constitutive model because of uncertainty of mathematical relationship and constraint of existing experimental *** present,there exists considerable gap between finite element simulation result and actual cutting *** emphases were put on investigating the correlation between ＂single factor＂ material constitutive model parameters and temperature for Ti6Al4V alloy,and also establishment of material constitutive model for this kind of *** analyses based on dislocation theory and material functional relations showed that material model was deeply affected by variation *** the least squares best fit to the available quasi-static and high-speed impact compression experiment data,material parameters at various temperatures were *** curves analyses and material parameters comparison showed that the ＂single factor＂ material constitutive model parameters were temperature *** the mathematical mapping between material parameters and temperature,＂single factor＂ material constitutive model of Ti6Al4V alloy was established,which was proven to be right by comparing with experimental *** work makes clear that the ＂single factor＂ material constitutive model parameters of Ti6Al4V alloy are temperature *** the same time,an accurate material constitutive model is established,which helps to optimize cutting process and control machining distortion for Ti6Al4V alloy aerospace parts.

关键词： metal cutting Ti6Al4V alloy finite element method material constitutive model

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Advanced Measures to Characterize Mechanical Properties of Refractories

引用

China's Refractories 2018年第1期27卷 8-13页

作者： Shengli JIN Harald HARMUTH Dietmar GRUBER Amina SIDI MAMMAR Ceramics Montanuniversitat Leoben Leoben A-8700 Austria

The thermomechanical modelling method is becoming an important tool nowadays for the refractory researchers, suppliers and end-users. On one hand, applications focus on the post-mortem thermomechanical analysis to interpret the occurred fitiluw phenomena of refractories in service. On the other hand, a priori investigation is very helpful for the design of refractory lining con- cepts before putting them into effect; as a result it will minimize the probability of refractory lining premature .failure and save costs for the refractory suppliers as well as for the end-users. For both investigation routines, suitable material constitutive models and testing approa- ches are of relevance. Existing material constitutive mod- els often used for refractories are the fictitious crack model acting for tensile failure, the Mohr - Coulomb or Drucker- Prager model describing shear failure, and the Norton - Bailey model representing creep. To charac- terize tbe tensile and shear fitilure of refractories at room temperatare and elevated temperatures, a wedge splitting test and a modified shear test can be applied, respectively. The creep behavior and corresponding creep parameters of refractories can be determined with an appropriate creep testing device at elevated loads. The proper appli- cation of material constitutive models and testing approa-ches allows for improving the thermo-mechanical modelling and the optimizatian of the lining design.

关键词： refractories wedge splitting test modified shear test compressive creep test tensile creeptest material constitutive model

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