开发一个用于粉末床融合过程的预测模型的新型框架.
Mallikharjun Marrey1,2, Ehsan Malekipour1,2, Hazim El-Mounayri1,2
1Department of Mechanical and Energy Engineering, Purdue University, Indianapolis, Indiana, USA.
3D printing and additive manufacturing
|February 23, 2024
概括
这项研究引入了粉末床融合 (PBF) 增材制造的新框架,使工艺参数能够精确控制,以优化316L不钢的性能,以实现高密度和卓越的机械性能.
科学领域:
- 材料科学与工程 材料科学与工程
- 增材制造 增材制造 增材制造
- 计算机建模 计算建模
背景情况:
- 粉床融合 (PBF) 是一种多功能金属添加剂制造技术.
- 目前的PBF研究往往缺乏一个系统的方法来同时建模多个参数.
- 优化PBF需要定量方法来将工艺参数与材料特性和最终部件质量联系起来.
研究的目的:
- 为316L不钢的PBF开发一个预测建模框架.
- 为了建立激光规格,体积能量密度和机械性能之间的相关性.
- 为了实现智能选择工艺参数,以实现所需的零件性能.
主要方法:
- 一个两阶段的框架来研究PBF过程参数.
- 使用支持向量回归,随机森林回归和神经网络开发预测模型.
- 分析激光参数,体积能量密度和材料特性之间的相关性.
主要成果:
- 通过优化参数实现高零件密度高达99.31%.
- 演示了预测模型,大约有10%的误差.
- 确定了用于增强机械性能的最佳体积能量密度范围.
结论:
- 拟议的框架和预测模型促进了有效的PBF流程优化.
- 智能参数选择可以提高密度,微观结构均性,硬度和冲击强度.
- 这种方法可以生产高质量的316L不钢零件,满足特定的性能要求.
相关概念视频
Analysis Methods of Pharmacokinetic Data: Model and Model-Independent Approaches
Drug disposition in the body is a complex process and can be studied using two major approaches: the model and the model-independent approaches.
The model approach uses mathematical models to describe changes in drug concentration over time. Pharmacokinetic models help characterize drug behavior in patients, predict drug concentration in the body fluids, calculate optimum dosage regimens, and evaluate the risk of toxicity. However, ensuring that the model fits the experimental data accurately...
The model approach uses mathematical models to describe changes in drug concentration over time. Pharmacokinetic models help characterize drug behavior in patients, predict drug concentration in the body fluids, calculate optimum dosage regimens, and evaluate the risk of toxicity. However, ensuring that the model fits the experimental data accurately...
Model Approaches for Pharmacokinetic Data: Compartment Models
Compartmental analysis is a widely adopted approach to characterizing drug pharmacokinetics. It uses compartment models that conceptualize the body as a collection of reversibly communicating compartments, each representing a group of tissues exhibiting similar drug distribution characteristics. The movement rate of the drug between these compartments is typically described by first-order kinetics.
Two primary types of compartment models are recognized: mammillary and catenary. The more...
Two primary types of compartment models are recognized: mammillary and catenary. The more...
Model Approaches for Pharmacokinetic Data: Distributed Parameter Models
Pharmacokinetic models are mathematical constructs that represent and predict the time course of drug concentrations in the body, providing meaningful pharmacokinetic parameters. These models are categorized into compartment, physiological, and distributed parameter models.
The distributed parameter models are specifically designed to account for variations and differences in some drug classes. This model is particularly useful for assessing regional concentrations of anticancer or...
The distributed parameter models are specifically designed to account for variations and differences in some drug classes. This model is particularly useful for assessing regional concentrations of anticancer or...
Model-Independent Approaches for Pharmacokinetic Data: Noncompartmental Analysis
Noncompartmental analyses offer an alternative method for describing drug pharmacokinetics without relying on a specific compartmental model. In this approach, the drug's pharmacokinetics are assumed to be linear, with the terminal phase log-linear. This assumption allows for simplified analysis and interpretation of the drug's behavior in the body.
One important characteristic of noncompartmental analyses is that drug exposure increases proportionally with increasing doses. This relationship...
One important characteristic of noncompartmental analyses is that drug exposure increases proportionally with increasing doses. This relationship...
Pharmacokinetic Models: Comparison and Selection Criterion
Physiological and compartmental models are valuable tools used in studying biological systems. These models rely on differential equations to maintain mass balance within the system, ensuring an accurate representation of the dynamic processes at play.
Physiological models take a detailed approach by considering specific molecular processes. They can predict drug distribution, metabolism, and elimination changes, providing a comprehensive understanding of how drugs interact with the body.
Physiological models take a detailed approach by considering specific molecular processes. They can predict drug distribution, metabolism, and elimination changes, providing a comprehensive understanding of how drugs interact with the body.
Methods of Medium Optimization
Optimizing growth media enhances microbial proliferation and maximizes product yield. Statistical experimental design methodologies provide structured and reproducible approaches, offering progressively higher levels of robustness and efficiency.The One-Factor-at-a-Time (OFAT) MethodThe One-Factor-at-a-Time (OFAT) method involves adjusting a single variable while keeping all others constant. However, it cannot detect interactions between variables, often leading to suboptimal outcomes when...


