|English to Chinese: Analysis on interfacial shear stress and determination of interfacial shear strength for yttria stabilized zirconia coating|
|Source text - English|
Coating-substrate system has many characteristics such as multidisciplinary, comprehensive, complex and systemic. Interfacial theoretical studies include interface structure optimization design, interface strength and interface recombination theory etc. Due to the diversity of the nature and structure for coating-substrate system, the performance parameters of the system are also diverse. Therefore, there are some key issues for the design of the coating material. Firstly, it is necessary to establish the mechanics model of the coating-substrate system.Secondly, the mechanical parameters should be tested and accumulated.Moreover, the interface layer composition and structure should be optimized. Nowaday, many works have been carried out on these problems. According to the state of plane stress, Hooke’ Law et al. deduced the axial and horizontal stress expression of the coating-substrate system. Based on the assuming of the strain compatibility of the system, Dolgov et al. reported a new calculation method of maximum strain, elastic modulus and Poisson's ratio for coating-substrate system. It integrated as geometry coordination conditions, Hooke's law and physics equations etc. . Lyashenko et al.[3,4] analyzed the normal stresses of coating-substrate system to establish fourth-order partial differential equations ( pde ) of the normal stresses. They obtained the complex expression of the coating normal stress by obtaining the general solution and special solutions and combines with the boundary conditions and Fourier transform. Nie et al. established the mechanics model of the coating-substrate system. They analyzed the variation of interfacial shear stress in the heat treatment process stabilization by with finite element software simulation. Morscher et al. established a model of layered composite elastic modulus. Based on cantilever beam theory, Zhang et al. analyzed the residual stress of elastic functionally graded coating. The axial force equilibrium conditions of the coating-substrate system, strain compatibility and moment equilibrium conditions were considered for this calculation. Finally, it obtained the general solution of the residual stress in coating.
|Translation - Chinese|
涂层和基体系统的研究具有多学科交叉性、综合性、复合性和系统性的特点。与界面相关的理论研究主要包括界面结构优化设计、界面结合强度与界面复合理论等。由于涂层和基体系统界面性质和结构可以千变万化，使得其性能参数也多种多样，正确建立涂层和基体系统的力学模型、测试和积累其力学性能参数、优化设计界面层成份和结构就成为设计涂层材料的关键问题。国内外许多学者在这一领域进行了深入研究。Hooke’ Law根据在平面应力状态，推导出基体和涂层轴向和横向的应力表达式。Dolgov 假设涂层和基体系统应变协调，综合诸如基体/涂层系统的几何协调条件、虎克定律以及物理方程等，提出一种新的涂层和基体系统最大应变、弹性模量和泊松比的计算方法。Lyashenko[3,4]进一步分析涂层和基体系统的法向应力，建立涂层法向应力的四阶偏微分方程，通过求解该方程的通解和特解，结合边界条件和傅里叶变换，给出较为复杂的涂层法向应力表达式。倪华建立了复合材料界面处的力学模型，并通过有限元软件模拟分析试样在稳定化热处理过程中界面剪切应力的变化规律。Morscher 针对涂层和基体系统建立了层状复合材料弹性模量的计算模型。张显程基于悬臂梁理论，分析了弹性功能梯度涂层残余应力，考虑到涂层和基体系统的轴向力平衡条件、应变协调条件以及弯矩平衡条件，获得涂层内残余应力的一般解.