设计和制造一种低成本的3d打印实验室设备,用于测量适合医疗设备的小尺寸聚合物薄膜的超弹性特性。

IF 2 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC HardwareX Pub Date : 2024-11-22 DOI:10.1016/j.ohx.2024.e00608
Hemanta Dulal, Seyedhamidreza Alaie
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引用次数: 0

摘要

超弹性材料由于其大的、弹性的、可恢复的应变而广泛地应用于医疗植入物和微机电系统中。然而,它们的机械性能对加工参数很敏感,可能导致表征不一致。各种测试装置已被用于表征超弹性材料;然而,它们往往是昂贵的。增材制造和开源软件/硬件的最新进展表明,在研究环境中,有可能有更简单的解决方案来表征它们;这就提出了一个问题,即人们是否可以用低成本的工具和测试来表征这些材料,这些工具和测试利用了柔软和小尺寸的样品。在这里,作者研究了一种开源的3d打印测试系统的潜力,这种测试系统旨在表征这种材料。该系统适用于小尺寸样品(亚毫米厚度)和大弹性变形,这在微创植入物的聚合物部件中很常见。作者利用增材制造技术开发了用于单轴和平面张力测试的零件,并采用了适合于测量大应变的低成本图像相关方法。聚二甲基硅氧烷被选择用于演示双参数Mooney-Rivlin模型,因为它的文档和在生物相容性设备中的使用。估计的杨氏模量和剪切模量是可重复的,与文献一致。曲线拟合具有挑战性,并且依赖于优化选择,当数据点有限时,与先前的报告一致。然而,通过大量的数据点和理想的优化误差选择,我们发现c1和c2与之前的报告接近。这项工作展示了一种低成本、3d打印、开源的测试装置,用于使用具有合理精度的双参数Mooney-Rivlin模型来表征超弹性材料。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Design and manufacture of a low-cost 3D-printed laboratory device to measure the hyperelastic properties of polymeric films with small form factor suitable for medical devices
Hyperelastic materials are extensively incorporated in medical implants and microelectromechanical systems due to their large, elastic, recoverable strains. However, their mechanical properties are sensitive to processing parameters that may lead to inconsistent characterization. Various test setups have been employed for characterizing hyperelastic materials; however, they are often costly. Recent advancements in additive manufacturing and open-source software/hardware suggest the possibility of simpler solutions in research settings for characterizing them; raising the question of whether one can characterize these materials with low-cost tools and tests that take advantage of soft and small form-factor samples. Here, the authors investigate the potential of an open-source, 3D-printed test system designed for characterizing such materials. This system is tailored for small form-factor samples (sub-mm thickness) and large elastic deformations, common in polymeric parts of minimally invasive implants. The authors developed parts using additive manufacturing for uniaxial and planar tension testing, with a low-cost image correlation method adapted for measuring large strains. Polydimethylsiloxane was chosen for demonstration of a two-parameter Mooney–Rivlin model, due to its documentation and use in biocompatible devices. The estimated Young’s and shear moduli were repeatable and consistent with the literature. Curve-fitting was challenging and dependent on the optimization choices, when data points were limited, consistent with prior reports. However, with a large number of data points and ideal optimization error choice, C1 and C2 were found to be close to those reported previously. This work demonstrates a low-cost, 3D-printed, open-source test setup for characterizing hyperelastic materials using a two-parameter Mooney–Rivlin model with reasonable accuracy.
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来源期刊
HardwareX
HardwareX Engineering-Industrial and Manufacturing Engineering
CiteScore
4.10
自引率
18.20%
发文量
124
审稿时长
24 weeks
期刊介绍: HardwareX is an open access journal established to promote free and open source designing, building and customizing of scientific infrastructure (hardware). HardwareX aims to recognize researchers for the time and effort in developing scientific infrastructure while providing end-users with sufficient information to replicate and validate the advances presented. HardwareX is open to input from all scientific, technological and medical disciplines. Scientific infrastructure will be interpreted in the broadest sense. Including hardware modifications to existing infrastructure, sensors and tools that perform measurements and other functions outside of the traditional lab setting (such as wearables, air/water quality sensors, and low cost alternatives to existing tools), and the creation of wholly new tools for either standard or novel laboratory tasks. Authors are encouraged to submit hardware developments that address all aspects of science, not only the final measurement, for example, enhancements in sample preparation and handling, user safety, and quality control. The use of distributed digital manufacturing strategies (e.g. 3-D printing) is encouraged. All designs must be submitted under an open hardware license.
期刊最新文献
IoT smartwatch based on open technologies for the collection of thermal comfort data Portable pressure chamber for manual camera-assisted monitoring of leaf water potential A portable low-cost polymerase chain reaction device Low-cost composite autosampler for wastewater sampling ScientISST CORE: A novel hardware development platform for biomedical engineering
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