{"id":5029,"date":"2019-04-04T20:44:31","date_gmt":"2019-04-04T20:44:31","guid":{"rendered":"https:\/\/nanovea.com\/?p=5029"},"modified":"2023-11-13T23:38:55","modified_gmt":"2023-11-13T23:38:55","slug":"compressione-su-materiali-morbidi-e-flessibili","status":"publish","type":"post","link":"https:\/\/nanovea.com\/it\/compression-on-soft-flexible-materials\/","title":{"rendered":"Compressione su materiali morbidi e flessibili"},"content":{"rendered":"\t\t
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Importance of testing soft, flexible materials
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An example of very soft and flexible samples is a microelectromechanical system. MEMS are used in everyday commercial products like printers, mobile phones, and cars [1]. Their uses also include special functions, such as biosensors [2] and energy harvesting [3]. For their applications, MEMS must be able to reversibly transition between their original configuration to a compressed configuration repeatedly [4]. To understand how the structures will react to mechanical forces, compression testing can be conducted. Compression testing can be utilized to test and tune various MEMS configurations as well as testing upper and lower force limits for these samples.<\/p>\n

 The Nanovea Mechanical Tester<\/a> Nano <\/a>Module\u2019s ability to accurately collect data at very low loads and travel over 1mm of distance makes it ideal for testing the soft and \u001fexible samples. By having independent load and depth sensors, large indenter displacement does not affect the readings by the load sensor. The ability to carry out low-load testing over a range of more than 1mm of indenter travel makes our system unique compared to other nanoindentation systems. In comparison, a reasonable travel distance for a nanoscale indentation system is typically below 250\u03bcm. <\/div>\n
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Measurement Objective<\/p>\n

In this case study, Nanovea conducted compression testing on two uniquely di\u001ferent \u001eflexible, spring-like samples. We showcase our ability to conduct compression at very low loads and record large displacement while accurately obtaining data at low loads and how this can be applied to the MEMS industry. Due to privacy policies, the samples and their origin will not be revealed in this study<\/p>\n

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Measurement Parameters
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Note: The loading rate of 1 V\/min is proportional to approximately 100\u03bcm of displacement when the indenter is in the air.<\/p>\n

Results and Discussion<\/i><\/u><\/p>\n

The sample\u2019s response to mechanical forces can be seen in the load vs depth curves. Sample A only displays linear elastic deformation with the test parameters listed above. Figure 2 is a great example of the stability that can be achieved for a load vs. depth curve at 75\u03bcN. Due to the load and depth sensors stability, it would be easy to perceive any signi\u001fcant mechanical response from the sample. <\/span><\/p>\n

Sample B displays a different mechanical response from Sample A. Past 750\u03bcm of depth, fracture-like behavior in the graph begins to appear. This is seen with the sharp drops in load at 850 and 975\u03bcm of depth. Despite traveling at a high loading rate for more than 1mm over a range of 8mN, our highly sensitive load and depth sensors allow the user to obtain the sleek load vs depth curves below. <\/span><\/p>\n

The stiffness was calculated from the unloading portion of the load vs depth curves. Stiffness reflects how much force is necessary to deform the sample. For this stiffness calculation, a pseudo Poisson\u2019s ratio of 0.3 was used since the actual ratio of the material is not known. In this case, Sample B proved to be stiffer than Sample A.<\/span><\/p>\n

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Conclusion<\/p>\n

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Two diff\u001ferent flexible samples were tested under compression using the Nanovea Mechanical Tester\u2019s Nano Module. The tests were conducted at very low loads (<80\u03bcN) and over a large depth range (>1mm). Nano-scaled compression testing with the Nano Module has shown the module\u2019s ability to test very soft and \u001eflexible samples. Additional testing for this study could address how repeated cyclical loading a\u001fects the elastic recovery aspect of the spring-like samples via the Nanovea Mechanical Tester\u2019s multi-loading option.<\/p>\n

For more information on this testing method, feel free to contact us at info@nanovea.com and for additional application notes please browse our extensive Application Note digital library.<\/p>\n

References<\/p>\n

[1] \u201cIntroduction and Application Areas for MEMS.\u201d EEHerald, 1 Mar. 2017, www.eeherald.com\/section\/design-guide\/mems_application_introduction.html<\/a>.<\/p>\n\n

[2] Louizos, Louizos-Alexandros; Athanasopoulos, Panagiotis G.; Varty, Kevin (2012). “Microelectromechanical Systems and Nanotechnology. A Platform for the Next Stent Technological Era”. Vasc Endovascular Surg.46 (8): 605\u2013609. doi:10.1177\/1538574412462637. PMID 23047818.<\/p>\n\n

[3] Hajati, Arman; Sang-Gook Kim (2011). “Ultra-wide bandwidth piezoelectric energy harvesting”. AppliedPhysics Letters. 99 (8): 083105. doi:10.1063\/1.3629551.<\/p>\n\n

[4] Fu, Haoran, et al. “Morphable 3D mesostructures and microelectronic devices by multistable bucklingmechanics.” Nature materials 17.3 (2018): 268.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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NOW, LET'S TALK ABOUT YOUR APPLICATION<\/b><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Importance of testing soft, flexible materials An example of very soft and flexible samples is a microelectromechanical system. MEMS are used in everyday commercial products like printers, mobile phones, and cars [1]. Their uses also include special functions, such as biosensors [2] and energy harvesting [3]. For their applications, MEMS must be able to reversibly […]<\/p>\n","protected":false},"author":1,"featured_media":11742,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[7,338,349,337,1],"tags":[],"class_list":["post-5029","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-application-notes","category-indentation-hardness-elastic","category-laboratory-testing","category-mechanical-testing","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/nanovea.com\/it\/wp-json\/wp\/v2\/posts\/5029","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nanovea.com\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nanovea.com\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nanovea.com\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nanovea.com\/it\/wp-json\/wp\/v2\/comments?post=5029"}],"version-history":[{"count":21,"href":"https:\/\/nanovea.com\/it\/wp-json\/wp\/v2\/posts\/5029\/revisions"}],"predecessor-version":[{"id":23498,"href":"https:\/\/nanovea.com\/it\/wp-json\/wp\/v2\/posts\/5029\/revisions\/23498"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nanovea.com\/it\/wp-json\/wp\/v2\/media\/11742"}],"wp:attachment":[{"href":"https:\/\/nanovea.com\/it\/wp-json\/wp\/v2\/media?parent=5029"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nanovea.com\/it\/wp-json\/wp\/v2\/categories?post=5029"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nanovea.com\/it\/wp-json\/wp\/v2\/tags?post=5029"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}