{"id":249791,"date":"2024-10-19T16:28:12","date_gmt":"2024-10-19T16:28:12","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-61788-62011\/"},"modified":"2024-10-25T11:40:42","modified_gmt":"2024-10-25T11:40:42","slug":"bs-en-61788-62011","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-61788-62011\/","title":{"rendered":"BS EN 61788-6:2011"},"content":{"rendered":"

IEC 61788-6:2011 covers a test method detailing the tensile test procedures to be carried out on Cu\/Nb-Ti superconductive composite wires at room temperature. This test is used to measure modulus of elasticity, 0,2 % proof strength of the composite due to yielding of the copper component, and tensile strength. The value for percentage elongation after fracture and the second type of 0,2 % proof strength due to yielding of the Nb-Ti component serves only as a reference. The sample covered by this test procedure has a round or rectangular cross-section with an area of 0,15 mm 2<\/sup> to 2 mm 2<\/sup> and a copper to superconductor volume ratio of 1,0 to 8,0 and without the insulating coating. This third edition cancels and replaces the second edition published in 2008. It constitutes a technical revision which adds a new Annex C including specific examples of uncertainty estimation related to mechanical tests.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
6<\/td>\nEnglish
\n
CONTENTS <\/td>\n<\/tr>\n
8<\/td>\nINTRODUCTION <\/td>\n<\/tr>\n
9<\/td>\n1 Scope
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n
10<\/td>\n4 Principle
5 Apparatus
5.1 Conformity
5.2 Testing machine <\/td>\n<\/tr>\n
11<\/td>\n5.3 Extensometer
6 Specimen preparation
6.1 Straightening the specimen
6.2 Length of specimen
6.3 Removing insulation
6.4 Determination of cross-sectional area (So)
7 Testing conditions
7.1 Specimen gripping
7.2 Pre-loading and setting of extensometer
7.3 Testing speed <\/td>\n<\/tr>\n
12<\/td>\n7.4 Test <\/td>\n<\/tr>\n
14<\/td>\n8 Calculation of results
8.1 Tensile strength (Rm)
8.2 0,2\u00a0% proof strength (Rp0,2A and Rp0,2B)
8.3 Modulus of elasticity (Eo and Ea)
9 Uncertainty <\/td>\n<\/tr>\n
15<\/td>\n10 Test report
10.1 Specimen
10.2 Results
10.3 Test conditions <\/td>\n<\/tr>\n
16<\/td>\nAnnex A (informative)
\nAdditional information relating to Clauses 1 to 10 <\/td>\n<\/tr>\n
17<\/td>\nFigure A.1 \u2013 An example of the light extensometer,where R1 and R3 indicate the corner radius <\/td>\n<\/tr>\n
18<\/td>\nFigure A.2 \u2013 An example of the extensometer provided with balance weightand vertical specimen axis <\/td>\n<\/tr>\n
21<\/td>\nAnnex B (informative)
\nUncertainty considerations <\/td>\n<\/tr>\n
22<\/td>\nTables
\n
Table B.1 \u2013 Output signals from two nominally identical extensometers
Table B.2 \u2013 Mean values of two output signals
Table B.3 \u2013 Experimental standard deviations of two output signals <\/td>\n<\/tr>\n
23<\/td>\nTable B.4 \u2013 Standard uncertainties of two output signals
Table B.5 \u2013 Coefficient of Variations of two output signals <\/td>\n<\/tr>\n
25<\/td>\nAnnex C (informative)
\nSpecific examples related to mechanical tests
Figure C.1 \u2013 Measured stress versus strain curve of the rectangularcross section NbTi wire and the initial part of the curve <\/td>\n<\/tr>\n
28<\/td>\nTable C.1 \u2013 Load cell specifications according to manufacturer\u2019s data sheet
Table C.2 \u2013 Uncertainties of displacement measurement <\/td>\n<\/tr>\n
29<\/td>\nTable C.3 \u2013 Uncertainties of wire width measurement
Table C.4 \u2013 Uncertainties of wire thickness measurement
Table C.5 \u2013 Uncertainties of gauge length measurement <\/td>\n<\/tr>\n
30<\/td>\nTable C.6 \u2013 Calculation of stress at 0 % and at 0,1 % strain using the zero offset regression line as determined in Figure\u00a0C.1b. <\/td>\n<\/tr>\n
31<\/td>\nFigure C.2 \u2013 0,2\u00a0% offset shifted regression line, the raw stress versus strain curve and the original raw data of stress versus strain
Table C.7 \u2013 Linear regression equations computed for the three shifted linesand for the stress versus strain curve in the region where the lines intersect <\/td>\n<\/tr>\n
32<\/td>\nTable C.8 \u2013 Calculation of strain and stress at the intersectionsof the three shifted lines with the stress strain curve <\/td>\n<\/tr>\n
33<\/td>\nTable C.9 \u2013 Measured stress versus strain data and the computed stress based on a linear fit to the data in the region of interest <\/td>\n<\/tr>\n
34<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Superconductivity – Mechanical properties measurement. Room temperature tensile test of Cu\/Nb-Ti composite superconductors<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2011<\/td>\n36<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":249794,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[285,2641],"product_tag":[],"class_list":{"0":"post-249791","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-17-220-20","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/249791","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/249794"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=249791"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=249791"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=249791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}