{"id":1997,"date":"2021-09-24T12:19:38","date_gmt":"2021-09-24T09:19:38","guid":{"rendered":"https:\/\/sites.uef.fi\/biophysics\/?page_id=1997"},"modified":"2024-02-19T17:43:04","modified_gmt":"2024-02-19T15:43:04","slug":"material-testing","status":"publish","type":"page","link":"https:\/\/sites.uef.fi\/biophysics\/material-testing\/","title":{"rendered":"Material Testing"},"content":{"rendered":"\n<h4 class=\"wp-block-heading\">Overview<\/h4>\n\n\n\n<p>The group is self-sufficient with the measurement and analysis software development. Our research instruments are built and customized for the special needs of the studies and the software must be adaptive for many different purposes. During the years we have built many applications that have also been continuously updated and modified to fulfil our requirements.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Mechanical testing<\/h4>\n\n\n\n<p>There are two similar custom-build fine material testing instruments. Newport Ultra-Precision Motion Controller, PM-500C is equipped with Newport Linear Actuator, PM500-1A, which is mounted to a frame. Honeywell load-cell is used to measure the force applied to the sample. A 16-bit data acquisition card (National Instruments) digitizes the analog signal from the load-cell. The instrument is controlled with an external computer through GPIB-interface and a custom programmed LabVIEW-based software. Resolution: 0.1 \u00b5m in position and 0.0001 N in force measurements.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"761\" height=\"1024\" src=\"https:\/\/sites.uef.fi\/biophysics\/wp-content\/uploads\/sites\/87\/2021\/09\/Mech_testing-761x1024.jpg\" alt=\"\" class=\"wp-image-2030\" style=\"width:416px;height:auto\" srcset=\"https:\/\/sites.uef.fi\/biophysics\/wp-content\/uploads\/sites\/87\/2021\/09\/Mech_testing-761x1024.jpg 761w, https:\/\/sites.uef.fi\/biophysics\/wp-content\/uploads\/sites\/87\/2021\/09\/Mech_testing-223x300.jpg 223w, https:\/\/sites.uef.fi\/biophysics\/wp-content\/uploads\/sites\/87\/2021\/09\/Mech_testing-768x1033.jpg 768w, https:\/\/sites.uef.fi\/biophysics\/wp-content\/uploads\/sites\/87\/2021\/09\/Mech_testing-1142x1536.jpg 1142w, https:\/\/sites.uef.fi\/biophysics\/wp-content\/uploads\/sites\/87\/2021\/09\/Mech_testing-1522x2048.jpg 1522w, https:\/\/sites.uef.fi\/biophysics\/wp-content\/uploads\/sites\/87\/2021\/09\/Mech_testing.jpg 1884w\" sizes=\"auto, (max-width: 761px) 100vw, 761px\" \/><figcaption class=\"wp-element-caption\"><strong>Fig 1.<\/strong> Material testing rack. A) Newport linear actuator, PM500-1A, B) Adjustable rack, C) Changeable load cell, where indenter is attached, D) platform for measurement chamber, E) Goniometer.<\/figcaption><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Determination of Poisson&#8217;s ratio<\/h4>\n\n\n\n<p>With this equipment, the Poisson&#8217;s ratio can be optically determined. The sample is compressed with a micrometer in unconfined geometry. The lateral deformation is determined with DMC 1-CCD camera (Polaroid). CCD-camera is mounted to Olympus BH-2 microscope (Olympus) and connected to PowerMac computer. Resolution: axial 1.0 \u00b5m and lateral 1.6 \u00b5m.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"272\" src=\"https:\/\/sites.uef.fi\/biophysics\/wp-content\/uploads\/sites\/87\/2021\/09\/Poisson_equipment.jpg\" alt=\"\" class=\"wp-image-2108\" style=\"width:448px;height:auto\" srcset=\"https:\/\/sites.uef.fi\/biophysics\/wp-content\/uploads\/sites\/87\/2021\/09\/Poisson_equipment.jpg 400w, https:\/\/sites.uef.fi\/biophysics\/wp-content\/uploads\/sites\/87\/2021\/09\/Poisson_equipment-300x204.jpg 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><figcaption class=\"wp-element-caption\"><strong>Fig 2.<\/strong> Setup for the determination of Poisson&#8217;s ratio.<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Overview The group is self-sufficient with the measurement and analysis software development. Our research instruments are built and customized for the special needs of the studies and the software must be adaptive for many different purposes. During the years we have built many applications that have also been continuously updated and modified to fulfil our [&hellip;]<\/p>\n","protected":false},"author":629,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-1997","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Material Testing - Biophysics Research Group<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sites.uef.fi\/biophysics\/material-testing\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Material Testing - Biophysics Research Group\" \/>\n<meta property=\"og:description\" content=\"Overview The group is self-sufficient with the measurement and analysis software development. 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