论文标题
弹性特性，纳米伏的屈服表面和流量规则
Elastic Properties, Yield Surface and Flow Rule of Nanopowder Compacts
论文作者
论文摘要
通过颗粒动力学方法研究了纳米化颗粒系统的不同压实过程，该过程是氧化铝纳米库的原型。对于所有过程：计算粉末紧凑的压实曲线“密度与压力”，从总变形中提取弹性和塑料部位，在各向同性固体近似中确定身体弹性模量。各向同性近似的不足。在应力张量不变的空间中构建了纳米脂的屈服表面。揭示了传统相关流量规则描述氧化物纳米植物压实过程的不适用性。提出了另一种流量规则。
Different compaction processes of the nanosized granular system, which is a prototype of an alumina nanopowder, are studied by the granular dynamics method. For all processes: compaction curves ''density vs. pressure'' of the powder compact are calculated, the elastic and the plastic parts are extracted from the total deformation, the body elastic moduli are determined within the isotropic solid approximation. The inadequacy of the isotropy approximation is established. The nanopowder yield surface is constructed in the space of stress tensor invariants. The inapplicability of the traditional associated flow rule for description of oxide nanopowders compaction processes is revealed. An alternative flow rule is suggested.
