Development of a macromechanical model for determination of the corrosion susceptibility of formed parts

开发用于确定成型零件腐蚀敏感性的宏观力学模型

基本信息

批准号：
235297247
负责人：
Professorin Dr.-Ing. Birgit Awiszus
金额：
--
依托单位：
Professur Werkstoff- und Oberflächentechnik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2013
资助国家：
德国
起止时间：
2012-12-31 至 2016-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/235297247?language=en
关键词：
Development macromechanical model determination corrosion

项目摘要

The objective of the submitted project is to ascertain a new macro-mechanical model implemented in the FEM. This model realizes an effective approach for the minimization of costs caused by corrosion. As arises from the state of the art, the susceptibility to corrosion, particularly of steel, is considerably influenced by the nearsurface residual stresses. With the knowledge of the residual stress behavior induced by the forming process simulation and the material-specific corrosion behavior, a model for a defined corrosion system is to be developed. Using this model the susceptibility to corrosion within a defined system can be numerically estimated before the fabrication of the components. This circumstance is the basis for the development and adaption of the forming process in relation to the residual stress and resulting corrosion behavior. Thereby, a reduction of costs in the early development phase of a new product is possible and, for defined application conditions, corrosion-resistant end products can be produced with the support of numeric process optimization. The material, the environment influencing the corrosion, for example the corrosive and the physical properties, and the time-dependent damage progress have to be considered as essential characteristics of the corrosion system. Therefore, applications in the offshore sector are predestined as defined and practice-orientated corrosion systems.

提交的项目的目的是确定在FEM中实施的新的宏观机械模型。该模型实现了一种有效的方法，可以最大程度地减少腐蚀引起的成本。由于从最新的状态产生的是，对腐蚀的敏感性，特别是钢的敏感性受到近乎表面残余应力的极大影响。借助形成过程模拟和特定于材料特异性腐蚀行为引起的残余应力行为的了解，将开发出定义的腐蚀系统的模型。使用此模型，可以在成分制造之前对定义系统中腐蚀的敏感性进行数值估算。这种情况是与残留应力和产生的腐蚀行为相关的形成过程发展和适应的基础。因此，在新产品的早期开发阶段的成本降低是可能的，对于确定的应用条件，可以在数字过程优化的支持下生产耐腐蚀的最终产品。材料，影响腐蚀的环境，例如腐蚀性和物理特性，以及时间相关的损害进度必须被视为腐蚀系统的基本特征。因此，在近海行业中的应用预定为定义和实践导向的腐蚀系统。