Experimental and numerical qualification of morphology-property-correlations using the method of essential work of fracture (EWF) by the example of polymer blends

以聚合物共混物为例，使用断裂基本功 (EWF) 方法对形态-性质-相关性进行实验和数值鉴定

基本信息

批准号：
322212489
负责人：
Professor Dr.-Ing. Christian Bonten
金额：
--
依托单位：
Institut für Kunststofftechnik (IKT)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2016
资助国家：
德国
起止时间：
2015-12-31 至 2018-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/322212489?language=en
关键词：
Experimental numerical qualification morphology property

项目摘要

The J-integral, the Crack-Tip-Opening-Displacement (CTOD), the energy release rate G and the method of the Essential Work of Fracture (EWF) are different methods to evaluate the fracture mechanical behavior of ductile materials. These methods are not suitable for dimensioning in design like the quasi-static tensile test, but are able to provide more accurate information in the case of local failure behavior. It is necessary to understand the local failure mechanisms to optimize materials. Their results offer also quantitative values, but can only be used for comparisons between different modified materials based on the same polymeric matrix. By varying the material modifications and/or morphology, which have an influence on the fracture behavior, materials can be optimized. From the applicants point of view, in particular the method of Essential Work of Fracture, is more appropriate and easy to use than the other methods and can be applied to neat polymers, polymer blends as well as particle and fiber reinforced polymers. Respectively, the simulation of the mechanical properties of materials at the atomic scale is not yet able to supply dimensioning parameters for the design, as the quasi-static tensile test does, but is pretty accurate at local inspections. The applicants regard this as useful to predict the Essential Work of Fracture and to optimize polymer blends for different applications. In this planned research project, the influence of different modifications on the investigated polymer blends will be determined with the method of Essential Work of Fracture. Simultaneously, the material modifications and the test method should be adjusted for the first time to make them predictable by means of molecular dynamics simulation.

J积分，裂纹 - 开放式置换（CTOD），能量释放速率G和断裂基本工作（EWF）的方法是评估延性材料断裂机械行为的不同方法。这些方法不适合在设计中的设计中尺寸，例如准静态拉伸测试，但在局部故障行为的情况下可以提供更准确的信息。有必要了解优化材料的局部故障机制。他们的结果还提供了定量值，但只能用于基于同一聚合物基质的不同修改材料之间的比较。通过改变对骨折行为影响的材料修饰和/或形态，可以优化材料。从申请人的角度来看，特别是裂缝基本工作的方法比其他方法更合适，更易于使用，并且可以应用于整洁的聚合物，聚合物混合物以及颗粒和纤维增强聚合物。分别对原子量表的机械性能的模拟尚不能够为设计提供尺寸参数，就像准静态拉伸测试一样，但在局部检查时非常准确。申请人认为这对于预测断裂的基本工作并优化不同应用的聚合物混合物是有用的。在这个计划的研究项目中，不同修改对所研究聚合物混合物的影响将通过裂缝基本工作的方法来确定。同时，应首次对材料修饰和测试方法进行调整，以使它们通过分子动力学模拟进行预测。