剪切性能和粘合粘合关节的数值模拟在多喷射融合3D打印的聚胺组件
Frantisek Sedlacek1, Martin Stejskal1, Nikola Bednarova1
1Faculty of Mechanical Engineering-Regional Technological Institute, University of West Bohemia, Univerzitni 8, 31200 Pilsen, Czech Republic.
Polymers
|November 27, 2025
概括
这项研究测试了四种粘合剂,用于粘合3D打印的聚胺 (PA12和PA12GB). 聚氨粘合剂实现了最高的剪切强度,在增材制造应用中表现优于环氧替代品.
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
- 粘附科学 粘附科学 粘附科学
背景情况:
- 增材制造 (AM) 技术,如惠普多喷气融合 (MJF) 越来越多地用于功能性最终用途零件.
- 聚胺 (PA12) 是常见的MJF材料,但很难有效地结合.
- 优化粘合剂粘合对于扩大AM元件的应用范围至关重要.
研究的目的:
- 用两个常见的MJF聚胺:PA12和玻璃珠填充的PA12 (PA12GB) 来研究粘接接头的剪切强度.
- 为了评估四种不同的工业粘合剂在这些3D打印基板上的性能.
- 分析表面粗度和基板成分对粘合剂关节强度的影响.
主要方法:
- 使用HP MJF 4200打印机制造了单环剪切试样.
- 粘合剂粘合使用定制的具进行,然后在Zwick-Roell Z250机器上进行机械测试.
- 使用3D光学显微镜测量了表面粗度;有限元素分析 (FEA) 模拟了应力分布.
主要成果:
- 一种基于聚氨的粘合剂 (3M Scotch-Weld DP620NS) 产生了最高的剪切强度:PA12的5.0 MPa和PA12GB的4.4 MPa.
- 混合烯酸盐-环氧粘剂 (Loctite HY4090) 在PA12GB基板上显示出更高的性能.
- 粘合剂类型显著影响了性能,占债券强度差异的65.7%.
结论:
- 与环氧替代品相比,聚氨粘合剂在粘合MJF聚胺方面提供了更高的性能.
- 基质成分 (PA12与PA12GB) 影响粘合性能,特定的粘合剂表现出不同的反应.
- FEA模拟为应力分布提供了有价值的见解,补充了用于AM应用的实验剪切强度数据.
相关概念视频
Yield Criteria for Ductile Materials under Plane Stress
453
In designing structural elements and machine parts using ductile materials, it is crucial to ensure that these components withstand applied stresses without yielding. Yielding is initially determined through a tensile test, which evaluates the material's response to uniaxial stress. However, tensile stress is insufficient when components face biaxial or plane stress conditions This condition requires advanced criteria to predict failure.
The Maximum Shearing Stress Criterion, also known as...
The Maximum Shearing Stress Criterion, also known as...
453
Bonding and Strength of Aggregate
445
The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
445
Design of Prismatic Beams for Bending
593
The design of prismatic beams, structural elements with a uniform cross-section, focuses on ensuring safety and structural integrity under load. The design process begins by determining the allowable stress, either from material properties tables, or by dividing the material's ultimate strength by a safety factor. This safety factor is essential for accommodating uncertainties, and varies depending on the material—timber, steel, or concrete—with each having unique strength and...
593
Flexural Stress
666
When analyzing bending in symmetric members, it's crucial to understand how stresses distribute when subjected to bending moments. This stress distribution is effectively described by applying fundamental mechanics and material science principles, particularly Hooke's Law for elastic materials.
Hooke's Law states that within the material's elastic limits, stress is directly proportional to strain. In a member experiencing a bending moment, the strain at any point is relative to its distance...
Hooke's Law states that within the material's elastic limits, stress is directly proportional to strain. In a member experiencing a bending moment, the strain at any point is relative to its distance...
666
Residual Stresses in Bending
502
In the study of elastoplastic members subjected to bending moments, understanding the loading and unloading phases is crucial for assessing material behavior and structural integrity. During the loading phase, as the bending moment increases, the material initially responds elastically, adhering to Hooke's Law, where stress is directly proportional to strain. When the load exceeds the yield strength, plastic deformation occurs, resulting in permanent strain and deformation that remains even...
502


