{"id":379664,"date":"2024-10-20T03:03:28","date_gmt":"2024-10-20T03:03:28","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-121352021\/"},"modified":"2024-10-26T05:30:01","modified_gmt":"2024-10-26T05:30:01","slug":"bs-iso-121352021","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-121352021\/","title":{"rendered":"BS ISO 12135:2021"},"content":{"rendered":"

This document specifies methods for determining fracture toughness in terms of K<\/i>, ?<\/i>, J<\/i> and R<\/i>-curves for homogeneous metallic materials subjected to quasistatic loading. Specimens are notched, precracked by fatigue and tested under slowly increasing displacement. The fracture toughness is determined for individual specimens at or after the onset of ductile crack extension or at the onset of ductile crack instability or unstable crack extension. In cases where cracks grow in a stable manner under ductile tearing conditions, a resistance curve describing fracture toughness as a function of crack extension is measured. In some cases in the testing of ferritic materials, unstable crack extension can occur by cleavage or ductile crack initiation and growth, interrupted by cleavage extension. The fracture toughness at crack arrest is not covered by this document. Special testing requirements and analysis procedures are necessary when testing weldments, and these are described in ISO 15653<\/span><\/span> which is complementary to this document.<\/p>\n

Statistical variability of the results strongly depends on the fracture type, for instance, fracture toughness associated with cleavage fracture in ferritic steels can show large variation. For applications that require high reliability, a statistical approach can be used to quantify the variability in fracture toughness in the ductile-to-brittle transition region, such as that given in ASTM E1921<\/span><\/span> . However, it is not the purpose of this document to specify the number of tests to be carried out nor how the results of the tests are to be applied or interpreted.<\/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\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
2<\/td>\nundefined <\/td>\n<\/tr>\n
10<\/td>\nForeword <\/td>\n<\/tr>\n
11<\/td>\n1 Scope
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n
12<\/td>\n4 Symbols and abbreviated terms <\/td>\n<\/tr>\n
15<\/td>\n5 General requirements
5.1 General <\/td>\n<\/tr>\n
17<\/td>\n5.2 Fracture parameters <\/td>\n<\/tr>\n
18<\/td>\n5.3 Fracture toughness symbols
5.4 Test specimens
5.4.1 Specimen configuration and size <\/td>\n<\/tr>\n
23<\/td>\n5.4.2 Specimen preparation <\/td>\n<\/tr>\n
29<\/td>\n5.5 Pre-test requirements
5.5.1 Pre-test measurements
5.5.2 Crack shape\/length requirements
5.6 Test apparatus
5.6.1 Calibration <\/td>\n<\/tr>\n
30<\/td>\n5.6.2 Force application
5.6.3 Displacement measurement
5.6.4 Test fixtures <\/td>\n<\/tr>\n
34<\/td>\n5.7 Test requirements
5.7.1 Three-point bend testing
5.7.2 Compact tension testing
5.7.3 Specimen test temperature <\/td>\n<\/tr>\n
35<\/td>\n5.7.4 Recording
5.7.5 Testing rates
5.7.6 Test analyses
5.8 Post-test crack measurements
5.8.1 General
5.8.2 Initial crack length, a0 <\/td>\n<\/tr>\n
40<\/td>\n5.8.3 Stable crack extension, \u0394a
5.8.4 Unstable crack extension <\/td>\n<\/tr>\n
41<\/td>\n6 Determination of fracture toughness for stable and unstable crack extension
6.1 General <\/td>\n<\/tr>\n
42<\/td>\n6.2 Determination of plane strain fracture toughness, Klc
6.2.1 General
6.2.2 Interpretation of the test record for FQ <\/td>\n<\/tr>\n
43<\/td>\n6.2.3 Calculation of KQ <\/td>\n<\/tr>\n
44<\/td>\n6.2.4 Qualification of KQ as Klc
6.3 Determination of fracture toughness in terms of \u03b4
6.3.1 Determination of Fc and Vc, Fu and Vu, or Fuc and Vuc <\/td>\n<\/tr>\n
45<\/td>\n6.3.2 Determination of Fm and Vm <\/td>\n<\/tr>\n
46<\/td>\n6.3.3 Determination of Vp
6.3.4 Calculation of \u03b40 <\/td>\n<\/tr>\n
47<\/td>\n6.3.5 Qualification of \u03b40 fracture toughness value <\/td>\n<\/tr>\n
48<\/td>\n6.4 Determination of fracture toughness in terms of J
6.4.1 Determination of Fc and Vc or qc, Fu and Vu or qu, or Fuc and Vuc or quc
6.4.2 Determination of Fm and qm
6.4.3 Determination of Up <\/td>\n<\/tr>\n
49<\/td>\n6.4.4 Calculation of J0 <\/td>\n<\/tr>\n
50<\/td>\n6.4.5 Qualification of J0 fracture toughness value <\/td>\n<\/tr>\n
51<\/td>\n7 Determination of resistance curves \u03b4-\u0394a and J-\u0394a and initiation toughness \u03b40,2BL and J0,2BL and \u03b4i and Ji for stable crack extension
7.1 General
7.2 Test procedure
7.2.1 General
7.2.2 Multiple-specimen procedure
7.2.3 Single-specimen procedure <\/td>\n<\/tr>\n
52<\/td>\n7.2.4 Final crack front straightness
7.3 Calculation of J and \u03b4
7.3.1 Calculation of J
7.3.2 Calculation of \u03b4 <\/td>\n<\/tr>\n
53<\/td>\n7.4 R-curve plot <\/td>\n<\/tr>\n
54<\/td>\n7.4.1 Plot construction <\/td>\n<\/tr>\n
55<\/td>\n7.4.2 Data spacing and curve fitting <\/td>\n<\/tr>\n
56<\/td>\n7.5 Qualification of resistance curves
7.5.1 Qualification of J-\u0394a resistance curves
7.5.2 Qualification of \u03b4\u2212\u0394a resistance curves <\/td>\n<\/tr>\n
57<\/td>\n7.6 Determination and qualification of J0,2BL and \u03b40,2BL
7.6.1 Determination of J0,2BL <\/td>\n<\/tr>\n
58<\/td>\n7.6.2 Determination of \u03b40,2BL <\/td>\n<\/tr>\n
59<\/td>\n7.7 Determination of initiation toughness Ji and \u03b4i by scanning electron microscopy (SEM)
8 Test report
8.1 Organization <\/td>\n<\/tr>\n
60<\/td>\n8.2 Specimen, material and test environment
8.2.1 Specimen description
8.2.2 Specimen dimensions
8.2.3 Material description
8.2.4 Additional dimensions
8.2.5 Test environment
8.2.6 Fatigue precracking conditions <\/td>\n<\/tr>\n
61<\/td>\n8.3 Test data qualification
8.3.1 Limitations
8.3.2 Crack length measurements
8.3.3 Fracture surface appearance
8.3.4 Pop-in
8.3.5 Resistance curves
8.3.6 Checklist for data qualification <\/td>\n<\/tr>\n
62<\/td>\n8.4 Qualification of Klc
8.5 Qualification of \u03b4c(B), \u03b4u(B), \u03b4uc(B) or \u03b4m(B) <\/td>\n<\/tr>\n
63<\/td>\n8.6 Qualification of Jc(B), Ju(B), Juc(B) or Jm(B)
8.7 Qualification of the \u03b4-R Curve
8.8 Qualification of the J-R Curve
8.9 Qualification of \u03b40,2BL(B) as \u03b40,2BL
8.10 Qualification of J0,2BL(B) as J0,2BL <\/td>\n<\/tr>\n
65<\/td>\nAnnex A (informative) Determination of \u03b4i and Ji <\/td>\n<\/tr>\n
70<\/td>\nAnnex B (normative) Crack plane orientation <\/td>\n<\/tr>\n
72<\/td>\nAnnex C (informative) Example test reports <\/td>\n<\/tr>\n
81<\/td>\nAnnex D (informative) Stress intensity factor coefficients and compliance relationships <\/td>\n<\/tr>\n
85<\/td>\nAnnex E (informative) Measurement of load-line displacement q in the three\u2011point bend test <\/td>\n<\/tr>\n
90<\/td>\nAnnex F (informative) Derivation of pop-in formulae <\/td>\n<\/tr>\n
92<\/td>\nAnnex G (informative) Analytical methods for the determination of Vp and Up <\/td>\n<\/tr>\n
93<\/td>\nAnnex H (informative) Guidelines for single-specimen methods <\/td>\n<\/tr>\n
107<\/td>\nAnnex I (normative) Power-law fits to crack extension data (see Reference [42]) <\/td>\n<\/tr>\n
108<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Metallic materials. Unified method of test for the determination of quasistatic fracture toughness<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2021<\/td>\n110<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":379673,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1088,2641],"product_tag":[],"class_list":{"0":"post-379664","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-77-040-10","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\/379664","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\/379673"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=379664"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=379664"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=379664"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}