{"id":293595,"date":"2024-10-19T19:57:00","date_gmt":"2024-10-19T19:57:00","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-228892013\/"},"modified":"2024-10-25T17:08:24","modified_gmt":"2024-10-25T17:08:24","slug":"bs-iso-228892013","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-228892013\/","title":{"rendered":"BS ISO 22889:2013"},"content":{"rendered":"

This International Standard specifies methods for determining the resistance to stable crack extension in terms of crack opening displacement, \u03b4<\/i>5<\/sub>, and critical crack tip opening angle, \u03c8<\/i>c<\/sub>, for homogeneous metallic materials by the quasistatic loading of cracked specimens that exhibit low constraint to plastic deformation. Compact and middle-cracked tension specimens are notched, precracked by fatigue, and tested under slowly increasing displacement.<\/p>\n

This International Standard describes methods covering tests on specimens not satisfying requirements for size-insensitive fracture properties; namely, compact specimens and middle-cracked tension specimens in relatively thin gauges.<\/p>\n

Methods are given for determining the crack extension resistance curve (R-curve). Point values of fracture toughness for compact specimens are determined according to ISO 12135. Methods for determining point values of fracture toughness for the middle-cracked tension specimen are given in Annex D.<\/p>\n

Crack extension resistance is determined using either the multiple-specimen or single-specimen method. The multiple-specimen method requires that each of several nominally identical specimens be loaded to a specified level of displacement. The extent of ductile crack extension is marked and the specimens are then broken open to allow measurement of crack extension. Single-specimen methods based on either unloading compliance or potential drop techniques can be used to measure crack extension, provided they meet specified accuracy requirements. Recommendations for single-specimen techniques are described in ISO 12135. Using either technique, the objective is to determine a sufficient number of data points to adequately describe the crack extension resistance behaviour of a material.<\/p>\n

The measurement of \u03b4<\/i>5<\/sub> is relatively simple and well established. The \u03b4<\/i>5<\/sub> results are expressed in terms of a resistance curve, which has been shown to be unique within specified limits of crack extension. Beyond those limits, \u03b4<\/i>5<\/sub> R-curves for compact specimens show a strong specimen dependency on specimen width, whereas the \u03b4<\/i>5<\/sub> R-curves for middle-cracked tension specimens show a weak dependency.<\/p>\n

CTOA is more difficult to determine experimentally. The critical CTOA is expressed in terms of a constant value achieved after a certain amount of crack extension. The CTOA concept has been shown to apply to very large amounts of crack extension and can be applied beyond the current limits of \u03b4<\/i>5<\/sub> applications.<\/p>\n

Both measures of crack extension resistance are suitable for structural assessment. The \u03b4<\/i>5<\/sub> concept is well established and can be applied to structural integrity problems by means of simple crack driving force formulae from existing assessment procedures.<\/p>\n

The CTOA concept is generally more accurate. Its structural application requires numerical methods, i.e. finite element analysis.<\/p>\n

Investigations have shown a very close relation between the concept of constant CTOA and a unique R-curve for both compact and middle-cracked tension specimens up to maximum load. Further study is required to establish analytical or numerical relationships between the \u03b4<\/i>5<\/sub> R-curve and the critical CTOA values.<\/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\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
6<\/td>\nForeword <\/td>\n<\/tr>\n
7<\/td>\nIntroduction <\/td>\n<\/tr>\n
9<\/td>\nSection sec_1
Section sec_2
1\tScope
2\tNormative references <\/td>\n<\/tr>\n
10<\/td>\nSection sec_3
Section sec_3.1
Section sec_3.2
Section sec_3.3
Section sec_3.4
Section sec_3.5
3\tTerms and definitions <\/td>\n<\/tr>\n
11<\/td>\nSection sec_4
Section sec_5
Section sec_5.1
4\tSymbols
5\tGeneral requirements
5.1\tIntroduction <\/td>\n<\/tr>\n
12<\/td>\nTable tab_1
Section sec_5.2
Section sec_5.2.1
Section sec_5.2.2
Section sec_5.2.2.1
5.2\tTest specimens <\/td>\n<\/tr>\n
13<\/td>\nSection sec_5.2.2.2
Section sec_5.2.2.3
Section sec_5.2.2.4
Section sec_5.2.2.4.1
Section sec_5.2.2.4.2
Section sec_5.2.2.4.3 <\/td>\n<\/tr>\n
14<\/td>\nSection sec_5.2.2.4.4
Section sec_5.3
Section sec_5.3.1
Section sec_5.3.2
Section sec_5.4
Section sec_5.4.1
Section sec_5.4.2
5.3\tPre-test requirements
5.4\tTest apparatus <\/td>\n<\/tr>\n
15<\/td>\nSection sec_5.4.3
Section sec_5.4.4
Section sec_5.5
5.5\tTest requirements <\/td>\n<\/tr>\n
16<\/td>\nSection sec_5.5.1
Section sec_5.5.1.1
Section sec_5.5.1.2
Section sec_5.5.1.3
Section sec_5.5.2
Section sec_5.5.2.1
Section sec_5.5.2.2
Section sec_5.5.2.3
Section sec_5.5.3
Section sec_5.5.4
Section sec_5.5.5 <\/td>\n<\/tr>\n
17<\/td>\nSection sec_5.5.6
Section sec_5.6
Section sec_5.6.1
Section sec_5.6.1.1
Section sec_5.6.1.2
Section sec_5.6.1.3
5.6\tPost-test crack measurements <\/td>\n<\/tr>\n
18<\/td>\nSection sec_5.6.2
Section sec_5.6.3
Section sec_5.6.3.1
Section sec_5.6.3.2 <\/td>\n<\/tr>\n
19<\/td>\nSection sec_6
Section sec_6.1
Section sec_6.2
Section sec_6.2.1
Section sec_6.2.2
Section sec_6.2.3
Section sec_6.3
6\tDetermination of \u03b45\u00a0\u2212\u00a0\u0394a resistance curve and CTOA
6.1\tGeneral
6.2\tTest procedure
6.3\tR-curve plot <\/td>\n<\/tr>\n
20<\/td>\nSection sec_6.3.1
Section sec_6.3.2
Section sec_6.4
6.4\tCritical CTOA determination <\/td>\n<\/tr>\n
21<\/td>\nSection sec_7
Section sec_7.1
Section sec_7.2
Section sec_7.2.1
7\tTest report
7.1\tGeneral
7.2\tSpecimen, material and test environment <\/td>\n<\/tr>\n
22<\/td>\nSection sec_7.2.2
Section sec_7.2.3
Section sec_7.2.4
Section sec_7.2.5
Section sec_7.3
Section sec_7.3.1
Section sec_7.3.2
Section sec_7.3.2.1
7.3\tTest data qualification <\/td>\n<\/tr>\n
23<\/td>\nSection sec_7.3.2.2
Section sec_7.3.3
Section sec_7.3.4
Section sec_7.3.5 <\/td>\n<\/tr>\n
24<\/td>\nSection sec_7.4
Section sec_7.5
Figure fig_1
7.4\tQualification of the \u03b45 R-Curve
7.5\tQualification of \u03c8c <\/td>\n<\/tr>\n
25<\/td>\nTable tab_b
Figure fig_2 <\/td>\n<\/tr>\n
26<\/td>\nTable tab_c
Figure fig_3 <\/td>\n<\/tr>\n
27<\/td>\nTable tab_d
Figure fig_4 <\/td>\n<\/tr>\n
28<\/td>\nTable tab_e
Figure fig_5 <\/td>\n<\/tr>\n
29<\/td>\nTable tab_f
Figure fig_6 <\/td>\n<\/tr>\n
30<\/td>\nTable tab_g
Figure fig_7 <\/td>\n<\/tr>\n
31<\/td>\nTable tab_h
Figure fig_8 <\/td>\n<\/tr>\n
32<\/td>\nTable tab_i
Figure fig_9 <\/td>\n<\/tr>\n
33<\/td>\nTable tab_j
Figure fig_10 <\/td>\n<\/tr>\n
34<\/td>\nTable tab_k
Figure fig_11 <\/td>\n<\/tr>\n
35<\/td>\nAnnex sec_A
Table tab_A.1
Annex\u00a0A
\n(informative)<\/p>\n

Examples of test reports <\/td>\n<\/tr>\n

36<\/td>\nTable tab_A.2 <\/td>\n<\/tr>\n
37<\/td>\nTable tab_A.3 <\/td>\n<\/tr>\n
38<\/td>\nTable tab_A.4 <\/td>\n<\/tr>\n
39<\/td>\nTable tab_A.5
Table tab_A.6 <\/td>\n<\/tr>\n
40<\/td>\nAnnex sec_B
Figure fig_B.1
Annex\u00a0B
\n(informative)<\/p>\n

Apparatus for measurement of crack opening displacement, \u03b45 <\/td>\n<\/tr>\n

41<\/td>\nFigure fig_B.2
Table tab_l
Figure fig_B.3 <\/td>\n<\/tr>\n
42<\/td>\nAnnex sec_C
Annex sec_C.1
Annex sec_C.2
Annex sec_C.2.1
Annex sec_C.2.1.1
Annex sec_C.2.1.2
Annex\u00a0C
\n(informative)<\/p>\n

Determination of the crack tip opening angle, \u03c8 <\/td>\n<\/tr>\n

43<\/td>\nAnnex sec_C.2.2 <\/td>\n<\/tr>\n
45<\/td>\nAnnex sec_C.3
Annex sec_C.3.1 <\/td>\n<\/tr>\n
46<\/td>\nAnnex sec_C.3.2
Annex sec_C.4 <\/td>\n<\/tr>\n
47<\/td>\nAnnex sec_C.5
Annex sec_C.5.1
Table tab_o
Figure fig_C.1 <\/td>\n<\/tr>\n
48<\/td>\nTable tab_p
Figure fig_C.2 <\/td>\n<\/tr>\n
49<\/td>\nFigure fig_C.3 <\/td>\n<\/tr>\n
50<\/td>\nTable tab_q
Figure fig_C.4 <\/td>\n<\/tr>\n
51<\/td>\nTable tab_r
Figure fig_C.5 <\/td>\n<\/tr>\n
52<\/td>\nAnnex sec_D
Annex sec_D.1
Annex\u00a0D
\n(informative)<\/p>\n

Determination of point values of fracture toughness <\/td>\n<\/tr>\n

53<\/td>\nAnnex sec_D.2
Table tab_s
Figure fig_D.1 <\/td>\n<\/tr>\n
54<\/td>\nTable tab_t
Figure fig_D.2 <\/td>\n<\/tr>\n
55<\/td>\nReference ref_1
Reference ref_2
Reference ref_3
Reference ref_4
Reference ref_5
Reference ref_6
Reference ref_7
Reference ref_8
Reference ref_9
Reference ref_10
Reference ref_11
Reference ref_12
Reference ref_13
Reference ref_14
Reference ref_15
Reference ref_16
Reference ref_17
Bibliography <\/td>\n<\/tr>\n
56<\/td>\nReference ref_18
Reference ref_19
Reference ref_20 <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Metallic materials. Method of test for the determination of resistance to stable crack extension using specimens of low constraint<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2013<\/td>\n60<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":293599,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1088,2641],"product_tag":[],"class_list":{"0":"post-293595","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\/293595","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\/293599"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=293595"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=293595"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=293595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}