单门和多门设计优化算法,用于提高热塑性注塑成型工艺中纤维增强的有效性
Mattia Perin1, Youngbin Lim2, Guido A Berti1
1Department of Management and Engineering, University of Padua, 36100 Vicenza, Italy.
Polymers
|July 29, 2023
概括
本研究介绍了一种算法,用于优化热塑性组件的注射门位置,通过控制纤维方向分布 (FOD) 来提高机械性能. 该方法使用机器学习实现了超过90%的准确性,提高了度高达26.9%.
科学领域:
- 材料科学 材料科学 材料科学
- 制造业 工程 制造工程
- 计算力学 计算力学 计算力学
背景情况:
- 在热塑性注塑成型中,纤维增强的方向对部件的机械性能有很大影响.
- 优化纤维定向分布 (FOD) 对于提高零件强度和性能至关重要.
- 目前用于确定最佳注射门 (IG) 位置的方法有限.
研究的目的:
- 开发和验证一种算法,用于识别热塑性注塑成型组件中最佳注射门 (IG) 位置.
- 通过优化基于零件几何和负载条件的纤维方向分布 (FOD) 来增强机械性能.
- 将有限体积方法 (FVM) 模拟与机器学习 (ML) 集成,以实现高效的优化.
主要方法:
- 开发了用于FVM模拟和结果分析的两部分视觉基本架构 (VBA) 代码.
- 与IG位置的相关纤维定向张量 (FOT) 使用单个和多个门配置.
- 在FVM模拟数据上训练了一种梯度增强 (GB) ML模型,以预测最佳IG位置,准确度>90%.
- 使用有限元法 (FEM) 验证了模拟框架,并对PA66-30GF工业外进行了实验室实验.
主要成果:
- 该算法确定了IG位置,在关键地区显著改善了当地FOD.
- 由于在负载路径上优化了纤维方向性,因此实现了平均26.9%的刚度改善.
- 工业罩的实验验证显示,与现有的IG溶液相比,局部刚度改善了16.4%.
结论:
- 拟议的算法有效地优化IG位置,以提高注塑成型部件的机械性能.
- 整合FVM模拟和ML提供了一个准确和高效的方法来解决复杂的制造挑战.
- 这项研究为改善纤维增强热塑性组件的设计和性能提供了一条途径.
相关概念视频
01:22Fiber Reinforced Concrete
102
Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...
102
01:22Design Example: Distributing Reinforcements in Concrete Sections
113
The topic explores the practical aspects of adjusting steel reinforcements within a concrete beam section to meet specific design requirements. When designing a reinforced concrete beam, it is essential to distribute the steel reinforcements properly to ensure structural integrity and efficiency. The example provided details a scenario where a beam requires a total steel cross-section of 4 square inches. The engineer identifies that the available steel bars have a nominal diameter of 1.693...
113
01:19Plastic Deformations
152
Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their...
152