Mechanical properties and failure probability of compact agglomerates
Mechanical properties and failure probability of compact agglomerates
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DOI：
10.1016/j.powtec.2015.08.045
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发表时间：
2015-12
影响因子：
5.2
通讯作者：
Alexander Russell;Janett Schmelzer;P. Müller;M. Krüger;J. Tomas
中科院分区：
文献类型：
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作者：
Alexander Russell;Janett Schmelzer;P. Müller;M. Krüger;J. Tomas
处理致密附聚物产品，例如通常是不均匀多孔且机械（接触）历史依赖的颗粒的颗粒，由于其统计分布的失效概率（通过塑料产量或破损），通常需要过高的成本和能量需求才能实现令人满意的工艺效率和产品质量。尽管它们的失效概率可能取决于多种材料特性和工艺条件，但关于尺寸以外的这些因素的影响的定性和统计上可靠的定量信息几乎不为人所知。本次交流对准静态单轴压缩下颗粒的实验力-位移和破碎行为（通常发生在产品加工和处理过程中）的实验力-位移和破碎行为进行了基于模型的数据评估的实用分析。描述了水分含量和装载率对颗粒分布微观和宏观力学性能的耦合影响。还报告了新鲜颗粒和受疲劳影响的颗粒的机械性能的比较。此外，还展示了使用 X 射线显微计算机断层扫描记录的宏观破裂和碎片模式。
Handling of compact agglomerate products such as granules which are typically inhomogeneous porous and mechanically (contact) history-dependent, is usually carried out with excessive costs and energy requirements to achieve merely a satisfactory process efficiency and product quality, owing to their statistically distributed probability of failure (by plastic yield or breakage). Although their failure probability may depend on several material properties and process conditions, qualitative and statistically reliable quantitative information about the influences of such factors other than size is hardly known.This communication presents a pragmatic analysis of model-based data evaluation of experimental force–displacement and breakage behavior of granules under quasi-static uniaxial compression, that commonly occurs during product processing and handling. The coupled influences of moisture content and loading rate on the distributed micro and macro mechanical properties of granules are described. A comparison of the mechanical properties of fresh and fatigue-affected granules is also reported. Furthermore, the macroscopic breakage and fragmentation pattern recorded using X-ray micro-computed tomography is also presented.