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首页> 外文会议>World Tribology Congress III vol.1; 20050912-16; Washington,DC(US) >FINITE ELEMENT ANALYSIS OF CERAMIC COATING SYSTEMS UNDER SPHERICAL INDENTATION WITH METALLIC INTERLAYER - PART II. RING CRACK ANALYSIS
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FINITE ELEMENT ANALYSIS OF CERAMIC COATING SYSTEMS UNDER SPHERICAL INDENTATION WITH METALLIC INTERLAYER - PART II. RING CRACK ANALYSIS

机译：带有金属夹层的球形标记下陶瓷涂层系统的有限元分析-第二部分。环裂纹分析

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摘要

Spherical indentation problems of ceramic coatings/metallic inter-layer/ductile substrate were investigated numerically by axisymmetric FEA for two typical ceramic coatings with relatively high and low elastic modulus deposited on aluminum alloy and carbon steel. The fracture mechanics of the ceramic coatings due to occurrence of surface ring cracks extending traverse coating thickness under spherical indenter were considered under the framework of linear fracture mechanics. The J-integral associated to such cracks was computed. The evolution of J-integral versus crack length and indentation depth was studied. The results show that metallic inter-layers can improve the fracture resistance of the ceramic layer under the same indentation conditions.
机译：通过轴对称有限元分析，对两种典型的高，低弹性模量的陶瓷涂层分别沉积在铝合金和碳钢上，通过轴对称有限元分析对陶瓷涂层/金属中间层/延性基体的球形压痕问题进行了数值研究。在线性压痕力学的框架下，考虑了由于在球形压头下表面环裂纹扩展了涂层厚度而导致的陶瓷涂层的断裂力学。计算与此类裂纹相关的J积分。研究了J积分对裂纹长度和压痕深度的演变。结果表明，在相同的压痕条件下，金属夹层可以提高陶瓷层的抗断裂性能。

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