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共连续互锁PDMS/PLA晶格复合材料的压缩性能和能量吸收特性

Compressive Properties and Energy Absorption Characteristics of Co-Continuous Interlocking PDMS/PLA Lattice Composites.

作者信息

Wang Han, Wang Kedi, Lei Jincheng, Fan Xueling

机构信息

Xi'an Key Laboratory of Extreme Environment and Protection Technology, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China.

International Center for Applied Mechanics, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an 710049, China.

出版信息

Materials (Basel). 2024 Aug 6;17(16):3894. doi: 10.3390/ma17163894.

DOI:10.3390/ma17163894
PMID:39203072
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11355919/
Abstract

Co-continuous interlocking lattice structures usually present superior compressive properties and energy absorption characteristics. In this study, co-continuous interlocking polydimethylsiloxane/polylactic acid (PDMS/PLA) lattice composites were designed with different strut diameters, and successfully manufactured by combining the fused deposition modeling (FDM) technique and the infiltration method. This fabrication method can realize the change and control of structure parameters. The effects of the strut diameter on the compressive properties and energy absorption behavior of PDMS/PLA lattice composites were investigated by using quasi-static compression tests. The compressive properties of the co-continuous interlocking PDMS/PLA lattice composites can be adjusted in a narrow density range by a linear correlation. The energy absorption density of the co-continuous interlocking PDMS/PLA lattice composites increases with the increase in the PLA strut diameter and presents a higher efficiency peak and wider plateau region. The PLA lattice acts as a skeleton and plays an important role in bearing the compressive load and in energy absorption. The indexes of the compressive properties/energy absorption characteristics and PLA volume fraction of co-continuous interlocking PDMS/PLA lattice composites show linear relationships in logarithmic coordinates. The effect of the PLA volume fraction increasing on the plateau stress is more sensitive than the compressive strength and energy absorption density.

摘要

共连续互锁晶格结构通常具有优异的压缩性能和能量吸收特性。在本研究中，设计了具有不同支柱直径的共连续互锁聚二甲基硅氧烷/聚乳酸（PDMS/PLA）晶格复合材料，并通过将熔融沉积建模（FDM）技术与渗透法相结合成功制备。这种制造方法可以实现结构参数的改变和控制。通过准静态压缩试验研究了支柱直径对PDMS/PLA晶格复合材料压缩性能和能量吸收行为的影响。共连续互锁PDMS/PLA晶格复合材料的压缩性能可以在较窄的密度范围内通过线性相关性进行调节。共连续互锁PDMS/PLA晶格复合材料的能量吸收密度随着PLA支柱直径的增加而增加，并呈现出更高的效率峰值和更宽的平台区域。PLA晶格作为骨架，在承受压缩载荷和能量吸收方面起着重要作用。共连续互锁PDMS/PLA晶格复合材料的压缩性能/能量吸收特性指标与PLA体积分数在对数坐标中呈线性关系。PLA体积分数增加对平台应力的影响比对压缩强度和能量吸收密度更敏感。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c618/11355919/e697070eae1f/materials-17-03894-g010.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c618/11355919/b99b8c19fe76/materials-17-03894-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c618/11355919/e697070eae1f/materials-17-03894-g010.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c618/11355919/c1a147f6d9f3/materials-17-03894-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c618/11355919/34fbb64f385a/materials-17-03894-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c618/11355919/960082931892/materials-17-03894-g008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c618/11355919/e697070eae1f/materials-17-03894-g010.jpg

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