格子结构 - 关于增材制造的机械描述
Karel Ráž1, Zdeněk Chval1, Mathis Pereira2
1Faculty of Mechanical Engineering, Regional Technological Institute, University of West Bohemia, Univerzitni 2732/8, 301 00 Plzen, Czech Republic.
Materials (Basel, Switzerland)
|November 9, 2024
概括
格子结构为工程应用提供了一个可持续的,轻量级的解决方案. 有限元模拟准确地预测了3D打印格子设计的性能,实验验证显示的错误率小于8%.
科学领域:
- 材料科学与工程 材料科学与工程
- 机械工程 机械工程
- 增材制造 增材制造 增材制造
背景情况:
- 格子结构,它们的重复的相互锁定模式,提供了强度,灵活性和减轻重量的最佳平衡.
- 它们的可定制性,从2D蜂到3DTPMS,以及与增材制造的兼容性使它们具有材料效率和成本效益.
- 这些结构具有很高的弹性,能量吸收和抗冲击能力,这对于航空航天和汽车应用至关重要.
研究的目的:
- 为3D打印格子结构创建有限元模拟的原理进行演示.
- 将模拟结果与实验测试的格子结构进行比较,包括那些充满粉末的格子结构.
- 分析基于格子的设计在材料和能源使用中的效率和可持续性.
主要方法:
- 开发用于格子结构的有限元模拟.
- 使用多喷气融合方法对3D打印样品进行实验测试.
- 对三种配置的分析:固体材料,纯格子和充满粉末的格子 (PA12GB).
主要成果:
- 实验结果显示,与真实测量相比,仿真误差小于8%.
- 错误的主要原因归因于PA12GB.使用异构材料模型而不是异构材料模型.
- 格子结构即使装满了粉末,也保持了刚性,这表明填充材料的影响最小.
结论:
- 有限元模拟提供了一种可靠的方法来预测3D打印格子结构的机械行为.
- 基于格子的设计提供了显著的生态和经济效益,由于高效的材料和能源使用.
- 该研究验证了格子结构作为各种行业可持续工程解决方案的有效性.
相关概念视频
02:22Structures of Solids
14.0K
Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
14.0K
02:33Lattice Centering and Coordination Number
9.5K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
Types of Unit Cells
Imagine taking a large number of identical...
9.5K
02:37Metallic Solids
18.3K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
18.3K