{"id":9,"date":"2018-07-18T13:21:34","date_gmt":"2018-07-18T17:21:34","guid":{"rendered":"https:\/\/multires.eos.ncsu.edu\/www-mtf-ncsu-edu\/?page_id=9"},"modified":"2018-07-18T13:31:15","modified_gmt":"2018-07-18T17:31:15","slug":"mmts","status":"publish","type":"page","link":"https:\/\/multires.eos.ncsu.edu\/www-mtf-ncsu-edu\/mmts\/","title":{"rendered":"Multiaxial Miniature Testing System (MMTS) with in-situ SEM testing facility"},"content":{"rendered":"

Multiaxial Miniature Testing System (MMTS) is a novel testing system under-development at NCSU through fabrication of many components as shown in Figure 1 and Figure 2. The testing frame (Figure 1) of MMTS under development has axial-torsional and internal pressurization capabilities to subject tubular sample to multi-axial stress state. In addition, MMTS uses custom fabricated grippers which can heat tubular sample to high temperature. The test system under development is designed to use with Scanning Electron Microscope (SEM) to perform in-situ SEM testing. MMTS comprises of heating-cooling, internal pressurization, and strain-measurement subsystems (Figure 2).<\/p>\n

 <\/p>\n

\"\"Figure 1: Testing frame of the Multiaxial Miniature Testing System (MMTS) under development.<\/i><\/p>\n

 <\/p>\n

\"\"Figure 2: Multiaxial Miniature Testing System (MMTS) under development with its different components.<\/i><\/p>\n

Heating of tubular sample is performed through resistive and conduction heating (Figure 3). For resistive-heating, electricity is passed through the metal sample, while for conduction-heating, heating coils are used on sample ends.<\/p>\n

\"\" Figure 3: Heating sub-system is used to heat tubular sample with the MMTS under development (Li, 2016). <\/i><\/p>\n

When the grippers are used to heat the samples, high heat from the grippers can damage the load frame electronics. To prevent this, a cooling sub-system (Figure 4). The cooling sub-system is fabricated by integrating power supply, pump, coolant reservoirs, micro tube fittings, etc.<\/p>\n

\"\"Figure 4: Cooling sub-system is used to cool grippers to prevent load frame electronics from damage in the MMTS under development (Li, 2016).<\/i><\/p>\n

A pressurization sub-system (Figure 5) can internally pressurize the tubular sample. This sub-system is fabricated using pressure booster, high pressure fittings, pressure gauge, pressure release valves, etc., and includes nitrogen gas supplies.<\/p>\n

\"\"Figure 5: Pressurization sub-system to internally pressurize tubular sample with the MMTS under development. (Li, 2016)<\/i><\/p>\n

To measure surface strain on the tubular sample 3D Digital Image Correlation (3D DIC) technique is employed with the MMTS (Figure 6). This strain measurement sub-system comprises of cameras with lenses and extension tubes for high magnification, vibration isolated optical table, precision rotation-translation stages, etc.<\/p>\n

\"\"Figure 6: Strain measurement sub-system for real-time strain measurement.<\/i><\/p>\n","protected":false},"excerpt":{"rendered":"

Multiaxial Miniature Testing System (MMTS) is a novel testing system under-development at NCSU through fabrication of many components as shown in Figure 1 and Figure 2. The testing frame (Figure…<\/p>\n","protected":false},"author":235,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"ncst_dynamicHeaderBlockName":"","ncst_dynamicHeaderData":"","ncst_content_audit_freq":"","ncst_content_audit_date":"","ncst_content_audit_display":false,"ncst_backToTopFlag":"","footnotes":""},"class_list":["post-9","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/multires.eos.ncsu.edu\/www-mtf-ncsu-edu\/wp-json\/wp\/v2\/pages\/9","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/multires.eos.ncsu.edu\/www-mtf-ncsu-edu\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/multires.eos.ncsu.edu\/www-mtf-ncsu-edu\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/multires.eos.ncsu.edu\/www-mtf-ncsu-edu\/wp-json\/wp\/v2\/users\/235"}],"replies":[{"embeddable":true,"href":"https:\/\/multires.eos.ncsu.edu\/www-mtf-ncsu-edu\/wp-json\/wp\/v2\/comments?post=9"}],"version-history":[{"count":6,"href":"https:\/\/multires.eos.ncsu.edu\/www-mtf-ncsu-edu\/wp-json\/wp\/v2\/pages\/9\/revisions"}],"predecessor-version":[{"id":21,"href":"https:\/\/multires.eos.ncsu.edu\/www-mtf-ncsu-edu\/wp-json\/wp\/v2\/pages\/9\/revisions\/21"}],"wp:attachment":[{"href":"https:\/\/multires.eos.ncsu.edu\/www-mtf-ncsu-edu\/wp-json\/wp\/v2\/media?parent=9"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}