Mechanical fracture of lattice structures fabricated by selective laser sintering

IF 4.4 3区工程技术 Q1 ENGINEERING, CIVIL

Archives of Civil and Mechanical Engineering Pub Date : 2025-02-20 DOI:10.1007/s43452-025-01149-y

Mohammad Reza Khosravani, Sören Bieler, Kerstin Weinberg, Tamara Reinicke

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引用次数: 0

Abstract

The current study is focused on the static and dynamic behavior of different 3D-printed lattice structures fabricated by selective laser sintering (SLS) technique. To this end, body-centered cubic and face-centered cubic lattice structures were designed and printed using polyamide 12 (PA 12) material. A series of compression tests were performed on the lattice specimens under static loading conditions. We used the conventional split Hopkinson pressure bar (SHPB) at the impact speed of 12 m/s to determine the dynamic behavior of 3D-printed structures under high strain rate. In experimental practices, a high-speed camera was utilized as non-contact optical technique to document the process from initial impact till the specimen failure. In addition, finite element models were developed to determine the dynamic mechanical response of the lattice models. The experimental results indicated that the compressive strength increased with the loading rate. It confirmed the strain rare sensitivity of the studied PA 12. The results of this study can be employed to enhance the design of 3D-printed lattice structures for their further engineering applications.

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选择性激光烧结制备晶格结构的力学断裂

目前的研究重点是采用选择性激光烧结（SLS）技术制备的不同3d打印晶格结构的静态和动态行为。为此，采用聚酰胺12 （pa12）材料设计并打印了体心立方和面心立方晶格结构。在静载条件下对晶格试件进行了一系列的压缩试验。在冲击速度为12 m/s的情况下，采用传统的分离式霍普金森压杆（SHPB）来测定高应变速率下3d打印结构的动态行为。在实验实践中，采用高速摄像机作为非接触光学技术，记录了从初始撞击到试样破坏的过程。此外，还建立了有限元模型来确定网格模型的动态力学响应。试验结果表明，抗压强度随加载速率的增大而增大。证实了所研究的pa12菌株的罕见敏感性。该研究结果可用于改进3d打印晶格结构的设计，以实现其进一步的工程应用。

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来源期刊

Archives of Civil and Mechanical Engineering 工程技术-材料科学：综合

CiteScore

6.80

自引率

9.10%

发文量

201

审稿时长

4 months

期刊介绍： Archives of Civil and Mechanical Engineering (ACME) publishes both theoretical and experimental original research articles which explore or exploit new ideas and techniques in three main areas: structural engineering, mechanics of materials and materials science. The aim of the journal is to advance science related to structural engineering focusing on structures, machines and mechanical systems. The journal also promotes advancement in the area of mechanics of materials, by publishing most recent findings in elasticity, plasticity, rheology, fatigue and fracture mechanics. The third area the journal is concentrating on is materials science, with emphasis on metals, composites, etc., their structures and properties as well as methods of evaluation. In addition to research papers, the Editorial Board welcomes state-of-the-art reviews on specialized topics. All such articles have to be sent to the Editor-in-Chief before submission for pre-submission review process. Only articles approved by the Editor-in-Chief in pre-submission process can be submitted to the journal for further processing. Approval in pre-submission stage doesn''t guarantee acceptance for publication as all papers are subject to a regular referee procedure.