AHSS: Development of Novel Finite Element Simulation Tools that Implement Crystal Plasticity Constitutive Theories Using an Efficient Spectral Framework

用于模拟变形合金制造过程和最终产品性能的预测工具主要采用唯象本构理论。事实证明，这些模型不适合各种应用。另一方面，基于物理的晶体塑性模型在预测多晶金属有限塑性变形中的各向异性力学响应和潜在晶体织构的同时演化方面取得了显着的成功。然而，这些工具在计算上非常昂贵。建议开发基于谱晶体塑性的有限元工具，用于模拟先进高强度钢（AHSS）的变形加工操作和机械性能，其计算时间可与工业上目前使用的工具相媲美。AHSS代表了一大类钢，与传统钢相比，其性能有了显著改善。与两个主要行业的拟议合作将确保所开发的工具将迅速应用于商业环境。拟议的跨学科研究跨越材料科学，机械工程和应用数学，将大大有助于关键科学和技术领域熟练人力资源的发展。此外，该提案的资金将对德雷克塞尔大学已经开展的举措产生积极影响，以确保将传统上代表性不足的少数民族和妇女纳入工程领域。

Predictive tools used in simulating wrought alloy manufacturing processes and final product performance predominantly employ phenomenological constitutive theories. Such models are proving inadequate for various applications. On the other hand, physics based crystal plasticity models have enjoyed remarkable success in predicting anisotropic mechanical response and the concurrent evolution of the underlying crystallographic texture in finite plastic deformation of several polycrystalline metals. However, these tools are extremely computationally expensive. It is proposed to develop spectral crystal plasticity based finite element tools for simulating deformation processing operations and mechanical performance of Advanced High Strength Steels (AHSS) with computational times that are comparable to the tools currently used by the industry. AHSS represent a broad class of steels with dramatic improvements in properties over traditional steels. The proposed collaboration with two major industries will ensure that the tools developed will be rapidly adopted into the commercial environment. The proposed interdisciplinary research cuts across materials science, mechanical engineering and applied mathematics and will contribute significantly to the development of skilled human resources in critical science and technology fields. Furthermore, funding for this proposal will positively impact the initiatives already underway at Drexel University to ensure inclusion of traditionally under-represented minorities and women in engineering.