{"id":292989,"date":"2024-10-19T19:54:16","date_gmt":"2024-10-19T19:54:16","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-7448-11991\/"},"modified":"2024-10-25T17:03:26","modified_gmt":"2024-10-25T17:03:26","slug":"bs-7448-11991","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-7448-11991\/","title":{"rendered":"BS 7448-1:1991"},"content":{"rendered":"

A method for determining critical fracture toughness and crack tip opening displacement for metallic materials under displacement controlled monotonic loading at quasi static rates.<\/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
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
1<\/td>\nBRITISH STANDARD <\/td>\n<\/tr>\n
2<\/td>\nCommittees responsible for this British\ufffdStandard <\/td>\n<\/tr>\n
3<\/td>\nContents <\/td>\n<\/tr>\n
7<\/td>\n1 Scope
2 Definitions
stress intensity factor
opening mode
plane strain fracture toughness
maximum fatigue stress intensity factor
crack tip opening displacement (CTOD)
critical CTOD
J- <\/td>\n<\/tr>\n
8<\/td>\nJ
critical
brittle crack extension
stable crack extension
stretch zone width (SZW)
pop-in
3 Symbols and designations <\/td>\n<\/tr>\n
10<\/td>\n4 Principle
5 Test specimens
6 General <\/td>\n<\/tr>\n
11<\/td>\nFigure 1 Flow chart for choice of fracture toughness parameter, specimen design and displacement measurement <\/td>\n<\/tr>\n
12<\/td>\nFigure 2 Proportional dimensions and tolerances for a rectangular section bend specimen
Figure 3 Proportional dimensions and tolerances for a square section bend specimen <\/td>\n<\/tr>\n
13<\/td>\nFigure 4 Proportional dimensions and tolerances for a straight notch compact specimen <\/td>\n<\/tr>\n
14<\/td>\nFigure 5 Proportional dimensions and tolerances for a stepped notch compact specimen <\/td>\n<\/tr>\n
15<\/td>\nChoice of specimen design
Specimen dimensions necessary for a valid determination of
Table 1 Dimensions of specimens that may lead to valid
6 Specimen preparation and fatigue precracking
Material condition <\/td>\n<\/tr>\n
16<\/td>\nCrack plane orientation
Machining
Figure 6 Acceptable fatigue crack starter notches and fatigue crack configurations (see <\/td>\n<\/tr>\n
17<\/td>\nFigure 7 Chevron notch <\/td>\n<\/tr>\n
18<\/td>\nFigure 8 Outward pointing knife edges and corresponding notch geometries (see <\/td>\n<\/tr>\n
19<\/td>\nFigure 9 Inward pointing knife edges and corresponding notch geometries (see <\/td>\n<\/tr>\n
20<\/td>\nFigure 10 Fixture for three point bend tests
Fatigue precracking <\/td>\n<\/tr>\n
22<\/td>\nTable 2 <\/td>\n<\/tr>\n
24<\/td>\nTable 3
7 Test equipment
Calibration
Force application <\/td>\n<\/tr>\n
25<\/td>\nDisplacement measuring devices
Monitoring and recording equipment
Testing fixtures <\/td>\n<\/tr>\n
26<\/td>\nFigure 11 Typical design of clevis for applying a tensile force to a compact specimen using a circular hole… <\/td>\n<\/tr>\n
27<\/td>\nFigure 12 Typical design of clevis for applying a tensile force to a compact specimen using a hole with a f… <\/td>\n<\/tr>\n
28<\/td>\n8 Test procedure
Specimen measurement
Three point bend testing
Compact tension testing <\/td>\n<\/tr>\n
29<\/td>\nFigure 13 Specimen test temperature
Testing
Recording <\/td>\n<\/tr>\n
30<\/td>\nCrack measurements after testing to fracture <\/td>\n<\/tr>\n
31<\/td>\n9 Analysis of test data
General
Determination of plane strain fracture toughness, <\/td>\n<\/tr>\n
34<\/td>\nDetermination of CTOD <\/td>\n<\/tr>\n
35<\/td>\nFigure 16 <\/td>\n<\/tr>\n
36<\/td>\nDetermination of <\/td>\n<\/tr>\n
37<\/td>\nFigure 17 <\/td>\n<\/tr>\n
38<\/td>\n10 Validity check lists
General
Specimen dimensions
Other items <\/td>\n<\/tr>\n
39<\/td>\n11 Test report <\/td>\n<\/tr>\n
40<\/td>\nAppendix A
Bibliography
Appendix B
Crack plane identification <\/td>\n<\/tr>\n
42<\/td>\nFigure 20 Non-basic fracture plane identification <\/td>\n<\/tr>\n
43<\/td>\nAppendix C
Measurement of load-line displacement (
Figure 21 Principle of the \u201ccomparator\u201d bar measurement <\/td>\n<\/tr>\n
44<\/td>\nFigure 22 Displacements associated with three point bend specimens
Figure 23 Simultaneous determination of extraneous displacements <\/td>\n<\/tr>\n
45<\/td>\nFigure 24 Location of two notch opening displacement measurements <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Fracture mechanics toughness tests – Method for determination of KIc, critical CTOD and critical J values of metallic materials<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2002<\/td>\n48<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":292991,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1088,2641],"product_tag":[],"class_list":{"0":"post-292989","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\/292989","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\/292991"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=292989"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=292989"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=292989"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}