用有限元法分析了Hertz接触应力下钢基体表面涂层裂纹和分层失效状况,采用无预制裂纹状况下的扩展有限元(XFEM)技术和内聚力(Cohesive)模型研究了涂层的裂纹扩展和分层失效过程.分析表明:涂层的裂纹萌生于涂层表面,并向内部扩展;涂层弹性模量越大越易产生裂纹,且裂纹扩展越深.涂层的分层失效主要是由涂层-基体界面切应力造成;由于畸变应力的存在,较薄涂层(如物理气相沉积涂层),涂层越厚越易产生分层;较厚涂层(如等离子喷涂涂层),涂层越薄越易产生分层.在另一方面,涂层的裂纹和分层会相互影响,分层会使涂层更易产生裂纹,使裂纹扩展越深,影响裂纹扩展速度;涂层裂纹会使涂层更易分层,使分层区域在远离接触区域方向上不断扩展.对比分析表明,研究结果与前人的理论及实验结果吻合较好,为今后进行涂层失效数值模拟提供了依据.
参考文献
| [1] | Hainsworth SV.;Page TF.;McGurk MR..The effect of coating cracking on the indentation response of thin hard-coated systems[J].Surface & Coatings Technology,19981/2(1/2):97-107. |
| [2] | Holmberg K;Ronkainen H;Laukkanen A;Wallin K.Friction and wear of coated surfaces - scales, modelling and simulation of tribomechanisms[J].Surface & Coatings Technology,20074/7(4/7):1034-1049. |
| [3] | Xiao, Yangyi;Shi, Wankai;Luo, Jing.Indentation for evaluating cracking and delamination of thin coatings using finite element analysis[J].Vacuum: Technology Applications & Ion Physics: The International Journal & Abstracting Service for Vacuum Science & Technology,2015Pt.A(Pt.A):17-30. |
| [4] | Yangyi Xiao;Wankai Shi;Jing Luo.The tribological performance of TiN, WC/C and DLC coatings measured by the four-ball test[J].CERAMICS INTERNATIONAL,20145(5):6919-6925. |
| [5] | A. L. Mohd Tobi;P. H. Shipway;S. B. Leen.Finite element modelling of brittle fracture of thick coatings under normal and tangential loading[J].Tribology International,2013:29-39. |
| [6] | A. Abdul-Baqi;E. Van der Giessen.Indentation-induced interface delamination of a strong film on a ductile substrate[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,20011(1):143-154. |
| [7] | Weizhou Li;Thomas Siegmund.An analysis of the indentation test to determine the interface toughness in a weakly bonded thin film coating -- substrate system[J].Acta materialia,200410(10):2989-2999. |
| [8] | 李录贤;王铁军.扩展有限元法（XFEM）及其应用[J].力学进展,2005(1):5-20. |
| [9] | H. Houmid Bennani;J. Takadoum.Finite element model of elastic stresses in thin coatings submitted to applied forces[J].Surface & Coatings Technology,19991(1):80-85. |
| [10] | 聂璞林 .界面断裂韧性与膜基结合性能关系的研究[D].上海交通大学,2009. |
| [11] | Abdul-Baqi A.;Van der Giessen E..Numerical analysis of indentation-induced cracking of brittle coatings on ductile substrates[J].International Journal of Solids and Structures,20026(6):1427-1442. |
| [12] | 王海斗;张志强;李国禄;徐滨士;朴钟宇.等离子喷涂层接触疲劳失效模式及失效机理的研究[J].摩擦学学报,2012(3):251-257. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%