ENV 1999-2 : DRAFT 1998

0 Foreword
1 General
  1.1 Scope of Eurocode 9 Part 2
      1.1.1 Application
      1.1.2 Structural forms
      1.1.3 Basic products
      1.1.4 Member forms
      1.1.5 Materials
      1.1.6 Joining methods
      1.1.7 Environmental conditions
  1.2 Normative references
  1.3 Distinction between Principles and Application Rules
  1.4 Assumptions
  1.5 Definitions
      1.5.1 Terms common to all Eurocodes
      1.5.2 Special terms used in this Part 2 of Eurocode 9
  1.6 Symbols
  1.7 Design Documents
      1.7.1 Drawings
      1.7.2 Manufacturing specification
      1.7.3 Operation manual
      1.7.4 Maintenance manual
2 Basis of design
  2.1 General
      2.1.1 Design objective
      2.1.2 Influence of fatigue on design
      2.1.3 Mechanism of failure
      2.1.4 Potential sites for fatigue cracking
      2.1.5 Conditions for fatigue susceptibility
      2.1.6 Methods of fatigue design
  2.2 Safe life design
      2.2.1 Prerequisites for safe life design
      2.2.2 Calculation procedure for Safe life design
  2.3 Damage tolerant design
      2.3.1 Prerequisites for damage tolerant design
      2.3.2 Determination of inspection strategy for
            damage tolerant design
  2.4 Design by assisted testing
3 Loading
  3.1 Sources of fatigue loading
  3.2 Derivation of fatigue loading
  3.3 Equivalent fatigue loading
  3.4 Partial safety factors for fatigue loading
4 Stress Analysis
  4.1 Global stress analysis
      4.1.1 General
      4.1.2 Use of beam elements
      4.1.3 Use of membrane and shell elements
  4.2 Applicability of nominal, modified nominal and hot
      spot stresses
      4.2.1 Nominal stresses
      4.2.2 Modified nominal stresses
      4.2.3 Hot spot stresses
  4.3 Derivation of stresses
      4.3.1 Derivation of nominal stresses
      4.3.2 Derivation of modified nominal stresses
      4.3.3 Derivation of hot spot stresses
      4.3.4 Stress orientation
  4.4 Stress range parameters for specific initiation sites
      4.4.1 Parent material, full penetration welds and
            mechanically fastened joints
      4.4.2 Fillet and partial penetration butt welds
      4.4.3 Adhesive bonds
      4.4.4 Castings
  4.5 Stress spectra
      4.5.1 Cycle counting
      4.5.2 Derivation of stress spectrum
5 Fatigue strength
  5.1 Detail categories
      5.1.1 Factors affecting detail category
      5.1.2 Detail category tables
  5.2 Fatigue strength data
      5.2.1 Classified details
      5.2.2 Unclassified details
      5.2.3 Adhesively bonded joints
      5.2.4 Hot spot stress
  5.3 Effect of mean stress
      5.3.1 General
      5.3.2 Plain material and mechanically fastened joints
      5.3.3 Welded joints
      5.3.4 Adhesive joints
      5.3.5 Low endurance range
      5.3.6 Cycle counting for R-ratio calculation
  5.4 Effect of environment
  5.5 Improvement techniques
6 Quality requirements
  6.1 Determination of required quality level
  6.2 Designation of quality levels on drawings
  6.3 Fitness-for-purpose assessment
Annex A (Informative) Stress analysis
Annex B (Informative) Guidance an assessment by fracture
        mechanics
Annex C (Informative) Testing for fatigue design
Annex D (Normative) Inspection and workmanship acceptance
        levels
Annex E (Informative) Fatigue strength improvement of welds
Annex F (Informative) Low cycle fatigue
Annex G (Informative) Influence of R-ratio

Covers the basis for the design of aluminium alloy structures with respect to the limit state of fatigue induced fracture.