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| 1 | Damage Simulation for 3D Braided Composites by Homogenization Method显示文摘In order to study the failure patterns and strength of 3D braided composites from the microscopic view,the damage propagation under tensile loading steps in three kinds of unit cells is simulated.The homogenization formula of micro-stress and the solving approach of finite element method are given firstly.A criterion is presented to determine the damage and its pattern of each element,and then the stiffness degradation method based on Murakami's geometric damage theory is used to simulate the status of damage under tensile loading steps for three kinds of unit cells.It can be seen that the damage percentage and damage pattern of damaged unit cell are totally different for different kind of unit cells.More damaged elements are observed for face cell and corner cell than that for body cell.It is also observed that the damage firstly occurs at the area of face cell,which agrees well with experimental results.It is verified that considering the effects of face and corner cells are important for the damage and strength analysis of 3D braided composites. | Dong Jiwei Feng Miaolin | 2010 | Chinese Journal of Aeronautics2010，23，6： | 3 |
| 2 | Mechanical Behavior and Microstructure Evolution of a Rolled Magnesium Alloy AZ31B Under Low Stress Triaxiality显示文摘Plastic deformation up to final rupture failure of a rolled magnesium(Mg) alloy Mg–3.0Al–1.0Zn–0.34Mn(AZ31B) under low stress triaxiality was investigated.Local strain evolution was quantified by the digital image correlation(DIC) technique analysis with tensile,combined tensile-shear,and shear specimens,corresponding to the stress triaxiality of 1/3,1/6 and 0,respectively.Stress–strain curves show that the yield stress reduces with the decrease in the stress triaxiality,and obviously exhibits different strain hardening response.Electron backscatter diffraction(EBSD) observations reveal that the twinning behavior depends on stress triaxiality.Before fracture,double twinning is the dominant mechanism at the stress triaxiality of 1/3,while extension twinning is prevalent at the stress triaxiality of 0.Moreover,scanning electron microscopy(SEM) shows that the fracture mechanism is transformed from microvoid growth and coalescence to internal void shearing as the stress triaxiality decreases from 1/3 to 0. | Hongchen Pan Fenghua Wang Li Jin Miaolin Feng Jie Dong | 2016 | Journal of Materials Science & Technology2016，32，12： | 3 |
| 3 | Modeling of fatigue crack growth from a notch显示文摘 | Fei Ding Miaolin Feng Yanyao Jiang | 2006 | International Journal of Plasticity2006，，7： | 1 |
| 4 | Application of Drucker–Prager plasticity to predict fracture in rectangular cup drawing of AZ31 alloy sheet显示文摘 | Fenghua Wang Jie Dong Miaolin Feng Xingwei Zheng Wenjiang Ding | 2011 | Materials Science & Engineering A2011，，： | 1 |
| 5 | Modeling of fatigue crack propagation 显示文摘 | Jiang Yanyao Feng Miaolin | 2004 | ASEM Journal of Engineering Materials and Technology2004，126，1： | 1 |
| 6 | FATIGUE LIFE PREDICTION OF SUS 630(H900) STEEL UNDER HIGH CYCLE LOADING显示文摘The fatigue life prediction of high strength steel SUS 630(H900)under high cycle loading is conducted with consideration of a characteristic fatigue length of material.Based on the Whler curve of smooth materials,a modified method for fatigue life prediction is approached.The characteristic fatigue length of material under cyclic loading is associated with the polycrystalline material.Rather than the stress at a point,the average stress within the characteristic fatigue length is implemented for the fatigue life prediction.The method can be applied to both the smooth and the defected material.The fatigue life prediction is also verified experimentally by specimens with various small circular holes.Through the comparison,it is found that the method can be adopted to predict the fatigue lives with diferent size efects. | Fengming Guo Miaolin Feng Defu Nie Jinquan Xu Md.Shahnewaz Bhuiyan Yoshiharu Mutoh | 2013 | Acta Mechanica Solida Sinica2013，26，6： | 1 |
| 7 | A new approach to predicting fatigue crack propagation显示文摘 | Jiang Yanyao Feng Miaolin | 2004 | American Society of Mechanical Engineers Pressure Vessels and Piping Division (Publication) PVP Fracture Methodologies and Manufacturing Processes2004，474，： | 1 |
| 8 | An approach for fatigue life prediction 显示文摘 | Jiang YanYao Ding Fei Feng MiaoLin | 2007 | Journal of Engineering Materials and Technology2007，129，： | 1 |
| 9 | Modeling of fatigue crack propagation显示文摘 | JIANG Yanyao FENG Miaolin | 2004 | ASEM Journal of Engineering Materials and Technology2004，126，1： | 1 |
| 10 | Martensitic Transformation Eflfect on the Dislocation Emission from a Semi-infinite Crack Tip in Nano composites显示文摘A theoretical model is established to investigate the effect of martensitic transformation particle on the dislocation emission from a crack tip in ceramic-matrix nanocomposites. Using the model of dislocation-based strain nucleus and the Green's function met hod, the expressions of complex potentials and stress fields are derived in closed form. The critical stress intensity factors for the first-lattice dislocation emission and the maximum number of emitted dislocations are well calculated. The effects of important parameters such as the size of transformation particle, the dislocation emission angle and the distance from the crack tip to the transformation particle on dislocation emission are discussed in detail. The results reveal that the transformation particle shows a significant shielding effect on the dislocation emission from the crack tip, and the shielding effect enhances with an increase in the size of transformation particle. On the other hand, the results also imply that the emission of edge dislocations is closely related with the dislocation emission angle, and there exists a probable angle |θ|≈ 74° making the dislocation emission easiest. Besides, the remarkable crack blunting induced by the dislocation emission is quite difficult for small grain size but easy for the growth of crack. | Tengwu He Miaolin Feng Xiuhua Chen | 2019 | Acta Mechanica Solida Sinica2019，32，2： | 0 |
| 11 | Analytic solution of quasicrystal microsphere considering the thermoelectric effect and surface effect in the elastic matrix显示文摘The incorporation of the quasicrystalline phase into the metal matrix offers a wide range of potential applications in particle-reinforced metal-matrix composites.The analytic solution of the piezoelectric quasicrystal(QC)microsphere considering the thermoelectric effect and surface effect contained in the elastic matrix is presented in this study.The governing equations for the QC microsphere in the matrix subject to the external electric loading are derived based on the nonlocal elastic theory,electro-elastic interface theory,and eigenvalue method.A comparison between the existing results and the finite-element simulation validates the present approach.Numerical examples reveal the effects of temperature variation,nonlocal parameters,surface properties,elastic coefficients,and phason coefficients on the phonon,phason,and electric fields.The results indicate that the QC microsphere enhances the mechanical properties of the matrix.The results are useful for the design and understanding of the characterization of QCs in micro-structures. | Yunzhi HUANG Wenqing ZHENG Xiuhua CHEN Miaolin FENG | 2023 | Applied Mathematics and Mechanics(English Edition)2023，44，8： | 0 |
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