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Text of the page (random words):
fail safe multiple load path structure 3 fail safe crack arrest structures 7 illustrative example of guidelines 0 illustrative example of guidelines 1 slow crack growth structure 0 slow crack growth structure 1 initial flaw sizes assumed to result from manufacturing 2 choice of inspection category 3 in service non inspectable category 4 depot level inspectable category 2 fail safe structure 0 fail safe structure 1 in service inspection consideration 2 initial flaw considerations 3 in service flaw assumptions following inspection 4 adjacent structure damage following the failure of the major load path 5 analysis of intact structure residual strength guidelines and damage growth limits 6 analysis of intact structure alternate requirement 7 discussion of intact structure analysis 8 analysis of remaining structure subsequent to load path failure 9 derivation of residual strength load 10 incremental damage growth da 11 alternative analysis of remaining structure subsequent to load path failure 12 summary and comments 4 sustainment aging aircraft 0 sustainment aging aircraft 1 widespread fatigue damage 2 the effect of environment and corrosion 5 references 2 fundamentals of damage tolerance 0 fundamentals of damage tolerance 1 introduction to damage concepts and behavior 0 introduction to damage concepts and behavior 1 damage growth concepts 2 damage growth behavior concepts 2 fracture mechanics fundamentals 0 fracture mechanics fundamentals 1 stress intensity factor what it is 2 application to fracture 3 fracture toughness a material property 4 crack tip plastic zone size 5 application to sub critical crack growth 6 alternate fracture mechanics analysis methods 0 alternate fracture mechanics analysis methods 1 strain energy release rate 0 strain energy release rate 1 the griffith irwin energy balance 2 the relationship between g compliance and elastic strain energy 2 the j integral 0 the j integral 1 j integral calculations 2 engineering estimates of j 3 crack opening displacement 3 residual strength methodology 4 life prediction methodology 0 life prediction methodology 1 initial flaw distribution 2 usage 3 material properties 4 crack tip stress intensity factor analysis 5 damage integration models 6 failure criteria 5 deterministic versus proabilistic approaches 6 computer codes 0 computer codes 1 structural analysis 2 life prediction 0 life prediction 1 nasgro fracture analysis software 2 afgrow fracture analysis software 3 cracks2000 structural integrity software 3 probability of fracture prof 7 achieving confidence in life prediction methodology 8 references 3 damage size characterizations 0 damage size characterizations 1 ndi demonstration of crack detection capability 0 ndi demonstration of crack detection capability 2 ndi capability evaluation for cracks 0 ndi capability evaluation for cracks 1 basic considerations in quantifying ndi capability 2 design of ndi capability demonstrations 3 sample size requirements 4 pod analysis 3 ndi capability evaluation for corrosion 0 ndi capability evaluation for corrosion 1 corrosion metrics 2 corrosion specimen selection and design 3 example of evaluating the capability of an eddy current inspection to detect hidden corrosion in lap joints 2 equivalent initial quality 0 equivalent initial quality 1 description of equivalent initial quality method 2 example application of equivalent initial quality method 3 other applications of equivalent flaw size distributions 0 other applications of equivalent flaw size distributions 1 durability analysis 2 risk analysis 3 proof test determinations 0 proof test determinations 1 description of the proof test method 2 examples 4 references 4 residual strength 0 residual strength 1 introduction 0 introduction 1 slow crack growth structure 2 fail safe structure 2 failure criteria 0 failure criteria 1 ultimate strength 2 fracture toughness abrupt fracture 3 crack growth resistance tearing fracture 0 crack growth resistance tearing fracture 1 the apparent fracture toughness approach 2 the resistance curve approach 3 the j integral resistance curve approach 3 residual strength capability 0 residual strength capability 1 single load path residual strength diagrams 2 built up structure residual strength diagrams 4 single load path structure 0 single load path structure 1 abrupt fracture 2 tearing fracture 5 built up structures 0 built up structures 1 edge stiffened panel with a central crack 2 centrally and edge stiffened panel with a central crack 3 analytical methods 4 stiffener failure 5 fastener failure 6 methodology basis for stiffened panel example problem 7 tearing failure analysis 8 summary 6 references 5 analysis of damage growth 0 analysis of damage growth 2 variable amplitude loading 0 variable amplitude loading 1 retardation 0 retardation 1 retardation under spectrum loading 2 retardation models 2 integration routines 3 cycle by cycle analysis 3 small crack behavior 4 stress sequence development 0 stress sequence development 1 service life description and mission profiles 2 sequence development techniques 3 application of simplified stress sequences for design studies 5 crack growth prediction 0 crack growth prediction 1 cycle definition and sequencing 2 clipping 3 truncation 4 crack shape 5 interaction of cracks 6 references 6 examples of damage tolerant analyses 0 examples of damage tolerant analyses 1 damage tolerance analysis procedure 2 damage development and progression 0 damage development and progression 1 slow crack growth structure 2 multiple load path fail safe structure 3 crack arrest fail safe structure 3 slow crack growth structure 4 multiple load path structure 5 fail safe multiple load path structure 7 damage tolerance testing 0 damage tolerance testing 1 introduction 2 material tests 0 material tests 1 fracture toughness testing methods 0 fracture toughness testing methods 1 plane strain fracture toughness 2 r curve 3 crack initiation j integral 2 sub critical crack growth testing methods 0 sub critical crack growth testing methods 1 crack growth rate testing 2 stress corrosion cracking 3 quality control testing 4 analysis verification testing 0 analysis verification testing 1 structural parameter verification techniques 0 structural parameter verification techniques 1 compliance 2 moiré fringe 3 photoelasticity 4 crack growth rate 2 residual strength methods verification 3 crack growth modeling verification 5 structural hardware tests 0 structural hardware tests 1 test conditions 2 initial and continuing damage 3 residual strength testing 4 damage tolerance test articles 5 evaluation and interpretation of test results 6 references 8 force management and sustainment engineering 0 force management and sustainment engineering 1 force structural management 0 force structural management 1 force structural management plan fsmp 2 loads environment spectra survey l ess 3 individual aircraft tracking iat 2 sustainment engineering 0 sustainment engineering 1 widespread fatigue damage 2 corrosion 3 structural risk analysis 3 references 9 structural repairs 0 structural repairs 1 required analysis 3 spectrum analysis for repair 0 spectrum analysis for repair 1 definition of stress histories 2 spectra descriptions 0 spectra descriptions 1 exceedance curve descriptions 2 rms descriptions 3 crack growth analysis 0 crack growth analysis 1 generation of crack growth curves 2 analysis of observed behavior 3 interpertation and use of crack growth rate curves 4 analysis for multiple stress histories 4 life sensitivity for stress effects 5 life sensitivity analysis for hole repair 6 blend out repairs 7 residual strength parametric analysis 8 references 10 guidelines for damage tolerance design and fracture control planning 0 guidelines for damage tolerance design and fracture control planning 1 design loads spectrum 2 material selection 0 material selection 1 crack growth resistance and fracture toughness 2 material property control 3 structural configuration analysis 0 structural configuration analysis 1 critical parts list 2 inspection method development 3 demonstration test development 4 manufacturing process 0 manufacturing process 1 review of manufacturing process and inspections 2 development of critical parts accountability 5 references 11 summary of stress intensity factor information 0 summary of stress intensity factor information 1 background of stress intensity factors 2 methodology for determining stress intensity factors 0 methodology for determining stress intensity factors 1 principle of superposition 3 finite element methods 0 finite element methods 1 direct methods 2 indirect methods 3 cracked element methods 3 selected stress intensity factor cases 5 computer codes 0 computer codes 1 nasgro fracture analysis software 2 afgrow fracture analysis software 3 cracks2000 structural integrity software 6 references examples 1 fac problems 0 computing stress intensity factor histories 1 predicting residual strength fuselage section 2 crack interaction and multi site damage 3 predicting ductile tearing and residual strength flat sheet 2 merc problems 0 crack growth prediction center wing component 1 damage tolerance analysis windshield doubler 2 sensitivity of crack growth rates to operating conditions 3 influences of retardation models on crack growth predictions 3 nrc problems 0 quantifying corrosion in lap joints 1 residual life assessment corroded lap joints 2 effect of discontinuity states on the risk assessment corroded lap joints 4 sie problems 0 crack growth analysis main cargo door msd cracks 1 damage tolerance analysis wing main spars 2 crack growth analysis main cargo door primary and continuing damage 3 damage tolerance analysis rear wing spar 4 crack growth and residual strength analyses lap joint 5 udri problems 0 crack growth analysis front wing spar 1 risk assessment fail safety of a stringer 2 risk assessment multiple element damage 3 risk assessment corrosion in a lap joint oil and gas industry application blog about afgrow customers partners resellers overview afgrow unique features and capabilities current version license agreement details pricing development credits todo list history disclaimer contact us afgrow 5 05 learn more afgrow virtual standard training october 5 8 2026 learn more afgrow european training workshop zurich university of applied sciences june 2028 learn more afgrow spectrum manager learn more previous next purchase current version training support services contact download sign up today for afgrow training register register for training afgrow is a user friendly flexible and intuitive damage tolerance analysis dta framework that allows users to analyze crack initiation fatigue crack growth and fracture to predict the life of metallic structures it is one of the most efficient and widely used crack growth life prediction tools available today afgrow was originally developed for aerospace applications however it can be applied to any type of metallic structure that experiences fatigue cracking afgrow has implemented api 579 stress intensity k solutions and burst criterion for fitness for service assessment ffs in pipeline applications afgrow includes five crack growth rate models forman equation walker equation tabular lookup harter t method and nasgro equation afgrow also includes a strain life based crack initiation capability with a large material parameter database and other options such as user defined stress intensity solutions user defined beta modification factors and a residual stress analysis capability a variety of useful tools are also included spectrum filtering k solution filtering spectrum cycle counting extensive cut paste capabilities and output to ms excel the afgrow gui includes real time crack growth animation crack length vs cycle plotting and crack growth rate model plots with data overlay capability afgrow provides com component object model automation interfaces that allows afgrow to interface with other windows applications to perform repetitive tasks or control afgrow from these applications a spectrum generation tool spectrum manager is also included with afgrow to assist users in developing and managing load history data to generate a loading spectrum afgrow users workshop 2026 the afgrow workshop 2026 was held at the hilton garden inn in ogden ut on september 15 16 2026 he workshop provided a forum for afgrow users to exchange ideas showcase practical applications of the software and discuss future enhancements the afgrow team also presented updates on the latest development efforts and upcoming capabilities the workshop proceedings are available online afmat fracture mechanics database afmat fracture mechanics database is now available for use by afgrow version 5 users who have been issued a permanent user license keeps the maintenance current the database contains data for over 600 materials 1229 sources and 11 property types da dn da dt kic a vs n users must be logged in to the afgrow web site to access afmat in the my afgrow section an afmat database manual is also available to explain how the database may be used it is highly recommended that users read this manual prior to accessing the database everyone can browse the available list of materials but only licensed afgrow version 5 users may perform filtered searches and download data afgrow release 5 05 05 27 registration is required to obtain the current version of afgrow once an afgrow user account has been approved afgrow is available for download on the afgrow web site via the my afgrow page this page is only visible when a user has logged in to their account afgrow comes with a free 5 day evaluation license please read and follow the installation instructions that are also located on the my afgrow page afmat fracture mechanics database is now available for use by afgrow version 5 users afgrow european training and workshop 2028 the afgrow european training and workshop 2028 will be held at the zhaw the school of engineering centre for aviation winterthur switzerland in june 2028 the afgrow european workshop 2014 2016 2018 2022 2024 and 2026 proceedings are available online damage tolerance design handbook the damage tolerance design handbook is available online the handbook provides specific background data and state of the art analysis methods to assist contractor and usaf personnel in complying with the jssg 2006 intricacies cookie settings necessary amplitide_id used by snipcart hide_cookie_alert hides the cookie notification when exited formname used by afgrow net to save logged in status snipcart cart used by snipcart to save cart items asp net_sessionid used asp net to store session info analytics ad_user_data sets consent for sending user data to google for advertising purposes analytics_storage enables storage such as cookies web or app identifiers apps related to analytics e g visit duration advertisement ad_personalization sets consent for personalized advertising ad_storage enables st...