{"id":294084,"date":"2024-10-19T19:59:25","date_gmt":"2024-10-19T19:59:25","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-85712018\/"},"modified":"2024-10-25T17:12:08","modified_gmt":"2024-10-25T17:12:08","slug":"bs-85712018","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-85712018\/","title":{"rendered":"BS 8571:2018"},"content":{"rendered":"

This British Standard gives methods for determining fracture toughness in metallic materials in terms of \u03b4<\/i> (crack tip opening displacement, CTOD) and J<\/i> (experimental equivalent of the J<\/i>-integral) using single edge notched tension (SENT) specimens.<\/p>\n

This British Standard also gives a method for determining fracture toughness as a resistance to ductile crack extension (R-curve), or single point determination of fracture toughness at onset of unstable crack extension, or pop-in. The method uses specimens which have been notched and fatigue pre-cracked into parent metal, weld metal or heat affected zone (HAZ). The specimens are loaded in tension, and the force and crack mouth opening displacement are recorded.<\/p>\n

\n

NOTE Methods to evaluate the suitability of a weld for notch placement within the target area and, where appropriate, to evaluate the effectiveness of the fatigue crack in sampling these areas are given in BS EN ISO 15653.<\/p>\n<\/blockquote>\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
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
4<\/td>\nForeword <\/td>\n<\/tr>\n
7<\/td>\n1 Scope
2 Normative references
3 Terms, definitions and symbols <\/td>\n<\/tr>\n
8<\/td>\n4 Principle <\/td>\n<\/tr>\n
9<\/td>\n5 Test sample and test specimen preparation
5.1 Test sample
5.2 Test specimen <\/td>\n<\/tr>\n
10<\/td>\nFigure 1 \u2014 Flowchart showing how to use the standard <\/td>\n<\/tr>\n
11<\/td>\nFigure 2 \u2014 SENT test specimen configuration <\/td>\n<\/tr>\n
13<\/td>\nFigure 3 \u2014 W\/B ratios in SENT test specimens <\/td>\n<\/tr>\n
14<\/td>\nFigure 4 \u2014 Machining tolerances and surface finish for a SENT specimen
5.3 Notching <\/td>\n<\/tr>\n
15<\/td>\nFigure 5 \u2014 Crack plane orientation code for fracture toughness specimens of parent metal and weld metal <\/td>\n<\/tr>\n
16<\/td>\n5.4 Fatigue pre-cracking
6 Test procedure
6.1 Measurements during testing <\/td>\n<\/tr>\n
17<\/td>\nFigure 6 \u2014 Example knife edges and notch geometries
6.2 Test specimen temperature <\/td>\n<\/tr>\n
18<\/td>\n6.3 Testing rate
6.4 Post-test measurements
7 Determination of resistance curves \u03b4\u2013\u0394a and J\u2013\u0394a
7.1 General
7.2 Multiple specimen method <\/td>\n<\/tr>\n
19<\/td>\n7.3 Single specimen methods
7.4 Calculating J <\/td>\n<\/tr>\n
20<\/td>\nFigure 7 \u2014 Determination of Up, Vp and Ve <\/td>\n<\/tr>\n
22<\/td>\n7.5 Calculating CTOD <\/td>\n<\/tr>\n
23<\/td>\nFigure 8 \u2014 Determination of CTOD (\u03b4) from the double clip gauge arrangement
7.6 Definition of the R-curve <\/td>\n<\/tr>\n
24<\/td>\nFigure 9 \u2014 Fitting the R-curve to the SENT crack extension data
7.7 Assessment of pop-ins
8 Determination of single point fracture toughness <\/td>\n<\/tr>\n
25<\/td>\n9 Test data qualification
9.1 Checklist for qualification
9.2 Test report <\/td>\n<\/tr>\n
26<\/td>\nAnnex A (informative)\u2002 Guidance for stable crack path deviation during ductile crack extension <\/td>\n<\/tr>\n
27<\/td>\nAnnex B (informative)\u2002 Guidance for using non-fatigue pre-cracked specimens
Annex C (informative)\u2002 Example calculation of J and CTOD for SENTs <\/td>\n<\/tr>\n
29<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Method of test for determination of fracture toughness in metallic materials using single edge notched tension (SENT) specimens<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2018<\/td>\n30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":294089,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[431,2641],"product_tag":[],"class_list":{"0":"post-294084","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-25-160-40","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\/294084","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\/294089"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=294084"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=294084"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=294084"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}