• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>American Society of Mechanical Engineers(ASME)/Society of Tribologists and Lubrication Engineers(STLE) International Joint Tribology Conference; 20071022-24; San Diego,CA(US) >NUMERICAL SIMULATIONS OF SOFT COATING DEFORMATION BY PARTICLE METHOD
【24h】

NUMERICAL SIMULATIONS OF SOFT COATING DEFORMATION BY PARTICLE METHOD

机译：颗粒法软涂层变形的数值模拟

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Conformability is one of the most important property for sliding bearings at the initial running-in stage. In order to improve this property, most bearings are coated with a soft overlay by several microns in thickness. The conformability relates closely to the plastic deformation and the slight wear of the coating made of resin or soft metal. To evaluate this conforming process, various tests have been conducted, and at the same time numerical simulations needs to be established. We try to develop a numerical simulation by a discrete particle method for analyzing elastic-plastic deformation of a soft coating. This particle method treats relatively larger space scale (discrete particles at 1 micron intervals) compared to the molecular dynamics simulations (MD). And there is no element consisting of nodes unlike finite element method (FEM). Therefore the particle method is convenient for treating failure behaviors (delamination or adhesion). But until now particle methods have never been applied for tribological soft coatings. So we have established a particle method for analyzing elastic-plastic deformation of the coatings in micron order scale and 3D system. Indentation tests were conducted to evaluate elastic-plastic deformations in several simulations and experiments, because indentation tests are popular for soft or hard tribological coatings to evaluate their elastic and plastic properties. In each test, the indenter is loaded and subsequently unloaded. During the loading-unloading process, the load and indentation depth relations were evaluated. In simulations by the discrete particle method, the elastic-plastic deformations were reproduced. These results coincide with the prediction that the elastic deformations relate to both loading and unloading processes whereas the plastic deformations relate to only loading process. These tendencies are confirmed by the relations of load and indentation depth. In addition, compared several simulations with several experiments, the deformations of soft coatings made of resin or soft metal were well described by the discrete particle models with two parameters of Young's modulus and yield stress.
机译：合格性是滑动轴承在初始磨合阶段的最重要属性之一。为了改善此性能，大多数轴承都涂有一层厚度为几微米的软覆盖层。贴合性与树脂或软金属制成的涂层的塑性变形和轻微磨损密切相关。为了评估这种符合标准的过程，已经进行了各种测试，同时需要建立数值模拟。我们尝试通过离散粒子方法开发数值模拟，以分析软涂层的弹塑性变形。与分子动力学模拟（MD）相比，此粒子方法处理相对较大的空间比例（每隔1微米的离散粒子）。而且，与有限元方法（FEM）不同，没有包含节点的元素。因此，粒子法便于处理失效行为（分层或粘附）。但是直到现在，颗粒方法还从未应用于摩擦软涂层。因此，我们建立了一种以微米级规模和3D系统分析涂层的弹塑性变形的粒子方法。压痕测试是在几个模拟和实验中进行的，以评估弹塑性变形，因为压痕测试广泛用于软或硬摩擦涂层，以评估其弹性和塑性。在每个测试中，压头都被加载，然后被卸载。在装卸过程中，评估了载荷与压痕深度之间的关系。在离散颗粒法模拟中，再现了弹塑性变形。这些结果与以下预测相吻合：弹性变形与装卸过程有关，而塑性变形仅与装卸过程有关。这些趋势由载荷和压痕深度的关系证实。此外，通过几次模拟与多次实验进行比较，用具有杨氏模量和屈服应力两个参数的离散粒子模型很好地描述了树脂或软金属制成的软涂层的变形。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号