In-Situ X-ray Laminography with Bi-axial Loads for the Multiscale Investigation of Damage Formation in Materials for Transportation

双轴载荷原位 X 射线层析成像用于运输材料损伤形成的多尺度研究

• 批准号: 391911929
• 负责人: Professor Dr. Tilo Baumbach
• 金额: --
• 依托单位: Laboratorium für Applikationen der Synchrotronstrahlung (LAS)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/391911929?language=en
• 关键词: Situ; ray; Laminography; Bi; axial

In the pursuit of lighter materials and optimized thin-walled components for transportation, knowledge about the characteristic ductile damage mechanisms in metal sheets is key. For the highly application-relevant bi-axial loading with load path changes, the strain-damage interaction is not understood. Thus, our proposal aims at three-dimensional (3D) imaging of the microstructure inside flat sheet specimens evolving during material testing under such loads. For this, we extend the capability of in situ synchrotron laminography to overcome inherent insufficience of other 3D techniques for such kind of samples. It shall be developed into a unique multiscale approach from a few hundred micrometers down to nanometer scale to determine the ductile damage nucleation and growth kinetics. Such hierarchical 3D data will serve as valuable input for microscopic simulations and the formulation and validation of continuum damage models suited to predict engineering-relevant mechanical properties.

为了追求较轻的材料和优化的薄壁组件以进行运输，有关金属板中特征性延性损伤机制的知识是关键。对于高度相关的具有负载路径变化的双轴负荷，不了解应变损伤相互作用。因此，我们的提案旨在对这种负载下材料测试期间在材料测试中演变的平面标本内的微观结构进行三维（3D）成像。为此，我们扩展了原位同步层压板的能力，以克服这种样品的其他3D技术的固有不足。它应将其发展为独特的多尺度方法，从几百微米降低到纳米尺度，以确定延性损伤成核和生长动力学。这样的分层3D数据将作为微观模拟的有价值的输入，以及用于预测与工程相关的机械性能的连续损伤模型的制定和验证。