A Theory for Designing Ductile Materials with Anisotropy
A Theory for Designing Ductile Materials with Anisotropy
复制标题
各向异性延性材料的设计理论
DOI：
--
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
A. Benzerga
中科院分区：
文献类型：
--
作者：
A. Benzerga
提出了一种预测理论，它可以预测在广泛的各向异性材料的相对延展性和韧性。定性，并可能定量，趋势的应力状态相关的延展性和断裂韧性得到没有实验输入以外的基本应力-应变曲线，证据的失败，由渐进的空化，夹杂物含量的基本信息。一个关键概念是各向异性对延展性的影响（AED）指数，它将材料的复杂三维各向异性属性与延展性和韧性的单一标量指数相关联。该指数具有基本意义，因为它是通过微观力学的尺度转换操作产生的。提出了概念的证明。该理论与轻质金属有关，其各向异性是固有的（Mg，Al），并最终由加工引起（金属板）。它也与增材制造的金属有关，其中孔隙率和工艺引起的各向异性似乎是不可避免的，因此该理论在延性-强度-成本权衡中是有用的。
A predictive theory is presented which enables projections of relative ductility and toughness in a wide class of anisotropic materials. Qualitative, and potentially quantitative, trends for stress-state-dependent ductility and fracture toughness are obtained with no experimental input other than the basic stress–strain curves, evidence of failure by progressive cavitation, and basic information about the inclusion content. A key concept is the anisotropy-effect-on-ductility (AED) index, which correlates complex three-dimensional anisotropy attributes of a material to a single scalar index of ductility and toughness. This index has a fundamental meaning as it emerges from a scale transition operation by means of micromechanics. A proof of concept is presented. The theory is relevant to lightweight metals whose anisotropy is inherent (Mg, Al), and eventually induced by processing (sheet metal). It is also relevant to additively manufactured metals where both porosity and process-induced anisotropy seem unavoidable so that the theory is useful in ductility–strength–cost tradeoffs.
影响因子：
9.4
作者：
Pineau, A.;Benzerga, A. A.;Pardoen, T.
通讯作者：
Pardoen, T.