用新型三次周期最小表面核心对三明治结构进行压缩测试的数值模拟
Alexandru Vasile1,2, Dan Mihai Constantinescu1,3, Andrei Ioan Indreș1,2
1Department of Strength of Materials, National University for Science and Technology POLITEHNICA Bucharest, Splaiul Independeţei 313, 060042 Bucharest, Romania.
Materials (Basel, Switzerland)
|January 25, 2025
概括
有限元分析 (FEA) 显示,隐式建模准确模拟了三次周期性最小表面 (TPMS) 三明治结构. 这种方法有助于在不进行广泛的实证测试的情况下验证用于增材制造的设计.
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
- 计算力学 计算力学 计算力学
背景情况:
- 具有三重周期性最小表面 (TPMS) 核心的三明治结构在轻量化设计,高强度和能量吸收方面具有优势.
- 增材制造 (AM) 技术,如立体石版 (SLA) 能够创建复杂的TPMS几何形状.
- 准确的模拟方法对于验证这些先进材料的结构性能至关重要.
研究的目的:
- 在新的TPMS和三明治结构的随机拓上进行有限元分析 (FEA).
- 为了比较隐式建模分析与传统的非统一的理性B-spline (NURBS) 方法.
- 评估通过SLA生产的聚合物零件的材料模型和模拟参数.
主要方法:
- 用Ansys模拟中的隐性建模进行了有限元分析 (FEA).
- 分析了八个新的TPMS核心和一个随机拓.
- 进行了敏感性分析,网状质量评估和四种材料模型的评估.
主要成果:
- 隐式建模证明了与TPMS三明治结构的传统NURBS方法相比的准确性.
- 从静态和明确的模拟中获得的FEA结果通常预测了故障机制,与实验数据保持一致.
- 隐式建模,尽管计算成本较高,为三明治设计提供可靠的结构验证.
结论:
- 隐式建模是模拟工程应用中的TPMS三明治结构的可行和准确的替代方案.
- 该研究提供了对增材制造部件有效验证的数值模拟参数的见解.
- FEA可以估计故障机制,减少了在结构设计中进行广泛实证测试的需要.
相关概念视频
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Eccentric axial loading occurs when an axial load is applied away from the centroidal axis of a structural member. This scenario is common in engineering, where structural elements may not be directly aligned due to various design or functional requirements.
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01:16Flexural Stress
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01:07Unsymmetric Loading of Thin-Walled Members: Problem Solving
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The shear center of a channel section with uniform thickness, height, and width, is determined by computing the shear force in the member and calculating the moments of inertia of the sections.
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Next, calculate the moments of...
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01:23Unsymmetric Loading of Thin-Walled Members
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Thin-walled members with non-symmetrical cross-sections are vital to engineering structures, offering material efficiency and structural integrity. However, unsymmetrical loading on these members leads to complex stress distributions, resulting in simultaneous bending and twisting can cause deformation or structural failure. The interaction between bending and twisting requires detailed analysis to ensure structural resilience.
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01:18Residual Stresses in Bending
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01:20Elastic Strain Energy for Shearing Stresses
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