Sintering - Modeling of Pressure-, Temperature-, or Time-Dependent Contacts

烧结 - 压力、温度或随时间变化的接触建模

• 批准号: 170236322
• 负责人: Professor Dr. Stefan Luding
• 金额: --
• 依托单位: Multiscale Mechanics (MSM) Group
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/170236322?language=en
• 关键词: Sintering; Modeling; Pressure; Temperature; Time

In most realistic situations, where particles come in contact, it cannot be assumed that the contact properties are independent of pressure, temperature or time. Therefore, this project involves pressure-, temperature-, and time-dependent contact properties and their influence on the macroscopic powder flow behaviour. Sintering is chosen as one possible example and starting point, where all these phenomena are relevant.The aim of this project is to model the particles in contact, before the particles lose their identity. For this, temperature- and pressure-dependent contact models have to be developed in parallel to the contact-measurements of T. Staedler, Siegen and M. Kappl, Mainz. Many-particle simulations will then be adapted to the materials used and experimentally validated together with J. Tomas, Magdeburg. Close cooperation with the projects of G. Auernhammer, Mainz, L. Brendel and D. Wolf, Duisburg, A. Kwade, Brunswick, and D. Kadau and H. Herrmann, ETH Zurich, has been established in the last project period.The main result of the project will be a validated numerical model for making quantitative predictions about the sintering process, as well as the micro-macro methodology, both embedded and recently implemented in the open-source community, e.g. Yade, LIGGGHTS, and MercuryDPM. The micro-macro transition will then be used to obtain better theoretical constitutive relations for a macroscopic description based on the contact-mechanics and -physics.

在大多数现实情况下，当颗粒接触时，不能假设接触特性与压力、温度或时间无关。因此，该项目涉及压力，温度和时间相关的接触特性及其对宏观粉末流动行为的影响。烧结被选为一个可能的例子和起点，所有这些现象都是相关的。该项目的目的是在颗粒失去身份之前对接触的颗粒进行建模。为此，温度和压力相关的接触模型必须与T的接触测量并行开发。Staedler，Siegen和M.卡普尔美因茨多粒子模拟将适用于所使用的材料，并与J. Tomas，马格德堡一起进行实验验证。与G.奥恩哈默、美因茨湖Brendel和D. Wolf，杜伊斯堡，A. Kwade、Brunswick和D. Kadau和H. Herrmann，ETH苏黎世，已经在上一个项目期间建立。该项目的主要成果将是一个经过验证的数值模型，用于对烧结过程进行定量预测，以及微观-宏观方法，这些方法都是嵌入式的，最近在开源社区（例如Yade，LIGGesterday和Mercuryesterday）中实现的。微观-宏观的转变，然后将被用来获得更好的理论本构关系的宏观描述的基础上的接触力学和物理。