{"id":249870,"date":"2024-10-19T16:28:34","date_gmt":"2024-10-19T16:28:34","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-61788-182013\/"},"modified":"2024-10-25T11:41:15","modified_gmt":"2024-10-25T11:41:15","slug":"bs-en-61788-182013","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-61788-182013\/","title":{"rendered":"BS EN 61788-18:2013"},"content":{"rendered":"

IEC 61788-18:2013 specifies a test method detailing the tensile test procedures to be carried out on Ag\/Bi-2223 and Ag\/Bi-2212 superconductive composite wires at room temperature. This test is used to measure the modulus of elasticity and to determine the 0,2 % proof strength. When the 0,2 % proof strength could not be determined due to earlier failure, the stress level at apparent strains of 0,05 %, 0,1 %, 0,15 %, 0,2 %, 0,25 % with increment of 0,05 % is measured. The values for elastic limit, fracture strength, percentage elongation after fracture and the fitted type of 0,2 % proof strength serve only as a reference. The sample covered by this test procedure should have a round or rectangular cross-section with an area of 0,3 mm 2<\/sup> to 2,0 mm 2<\/sup> (corresponding to the tape-shaped wires with width of 2,0 mm to 5,0 mm and thickness of 0,16 mm to 0,4 mm). Key words: superconductivity, mechanical properties measurement<\/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\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
4<\/td>\nForeword
Endorsement notice <\/td>\n<\/tr>\n
5<\/td>\nAnnex ZA (normative) Normative references to international publications with their corresponding European publications <\/td>\n<\/tr>\n
6<\/td>\nEnglish
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
11<\/td>\n4 Principle
5 Apparatus
5.1 General
5.2 Testing machine
5.3 Extensometer
6 Specimen preparation
6.1 General <\/td>\n<\/tr>\n
12<\/td>\n6.2 Length of specimen
6.3 Removing insulation
6.4 Determination of cross-sectional area (S0)
7 Testing conditions
7.1 Specimen gripping
7.2 Setting of extensometer
7.3 Testing speed
7.4 Test <\/td>\n<\/tr>\n
13<\/td>\nFigures
Figure\u00a01 \u2013 Typical stress-strain curve and definition of modulus of elasticity and 0,2\u00a0% proof strengths of an Ag\/Bi-2223 wire externally laminated by brass foil <\/td>\n<\/tr>\n
14<\/td>\n8 Calculation of results
8.1 Modulus of elasticity (E)
Figure\u00a02 \u2013 Typical stress-strain curve of an Ag\/Bi-2223 wire where the 0,2\u00a0% proof strengths could not be determined and definition of tensile stresses at specified strains <\/td>\n<\/tr>\n
15<\/td>\n8.2 0,2 % proof strength (Rp 0,2)
8.3 Tensile stress at specified strains (RA) <\/td>\n<\/tr>\n
16<\/td>\n8.4 Fracture strength (Rf)
9 Uncertainty of measurement
10 Test report
10.1 Specimen <\/td>\n<\/tr>\n
17<\/td>\n10.2 Results
10.3 Test conditions <\/td>\n<\/tr>\n
18<\/td>\nAnnex A (informative) Additional information relating to Clauses 1 to 14
Figure\u00a0A.1 \u2013 Low mass Siam twin type extensometer with a gauge length of ~ 12,3 mm (total mass ~ 0,5 g) <\/td>\n<\/tr>\n
19<\/td>\nFigure A.2 \u2013 Low mass double extensometer with a gauge length of ~ 25,6 mm (total mass ~ 3 g) <\/td>\n<\/tr>\n
20<\/td>\nFigure\u00a0A.3 \u2013 An example of the extensometer provided with balance weight and vertical specimen axis <\/td>\n<\/tr>\n
21<\/td>\nFigure\u00a0A.4 \u2013 Original raw data of an Ag\/Bi-2223 wire measurement in form of load and displacement graph <\/td>\n<\/tr>\n
22<\/td>\nFigure\u00a0A.5 \u2013 Typical stress versus strain of an Ag\/Bi-2223 wire up to the elastic limit corresponding to the transition region from elastic to plastic deformation (point G) <\/td>\n<\/tr>\n
25<\/td>\nTables
Table\u00a0A.1 \u2013 Results of relative standard uncertainty values achieved on different Ag\/Bi-2223 wires during the international round robin tests <\/td>\n<\/tr>\n
26<\/td>\nTable\u00a0A.2 \u2013 Selected data for F test for E0 of Sample E bare wire
Table\u00a0A.3 \u2013 Results of F-test for the variations of E0 of four kinds of Bi-2223 wires <\/td>\n<\/tr>\n
28<\/td>\nAnnex B (informative) Uncertainty considerations <\/td>\n<\/tr>\n
29<\/td>\nTable\u00a0B.1 \u2013 Output signals from two nominally identical extensometers
Table\u00a0B.2 \u2013 Mean values of two output signals
Table\u00a0B.3 \u2013 Experimental standard deviations of two output signals
Table\u00a0B.4 \u2013 Standard uncertainties of two output signals <\/td>\n<\/tr>\n
30<\/td>\nTable\u00a0B.5 \u2013 Coefficient of variations of two output signals <\/td>\n<\/tr>\n
32<\/td>\nAnnex C (informative) Specific examples related to evaluation of uncertainties for Ag\/Bi-2223 and Ag\/Bi-2212 wires <\/td>\n<\/tr>\n
33<\/td>\nFigure\u00a0C.1 \u2013 Measured stress versus strain curve for Bi-2223 wire <\/td>\n<\/tr>\n
34<\/td>\nTable\u00a0C.1. \u2013 Load cell specifications according to manufacturer\u2019s data sheet <\/td>\n<\/tr>\n
35<\/td>\nTable\u00a0C.2 \u2013 Uncertainties from various factors for stress measurement <\/td>\n<\/tr>\n
37<\/td>\nTable\u00a0C.3 \u2013 Uncertainties with respect to measurement of strain measurement
Table\u00a0C.4 \u2013 Summary of evaluated uncertainties caused by various factors <\/td>\n<\/tr>\n
38<\/td>\nTable\u00a0C.5 \u2013 Results of uncertainty evaluation for the modulus of elasticity (E0\u00a0=\u00a086,1 GPa) as a function of initial cross head rate <\/td>\n<\/tr>\n
39<\/td>\nTable\u00a0C.6 \u2013 Uncertainties from various factors for stress measurement
Table C.7 \u2013 Results of uncertainty evaluation for the stress (R = 42,5 MPa) as a function of initial strain rate <\/td>\n<\/tr>\n
40<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Superconductivity – Mechanical properties measurement. Room temperature tensile test of Ag- and\/or Ag alloy-sheathed Bi-2223 and Bi-2212 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>\n2014<\/td>\n42<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":249874,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[285,2641],"product_tag":[],"class_list":{"0":"post-249870","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\/249870","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\/249874"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=249870"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=249870"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=249870"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}