DI-SESS-81939A

Stress, Fatigue, and Fracture Analysis Report

The Stress, Fatigue, and Fracture Analysis Report documents the methods, assumptions, and results of stress, fatigue, and fracture life assessments performed during equipment design.

Approval DateApril 8, 2024

AMSC NumberN10470

Preparing ActivityAS

Project NumberSESS-2024-018

OPR—

DTIC Applicable—

GIDEP Applicable—

Limitation—

Applicable Forms—

Approval Limitation—

Form Version—

DID Formatfree_text

963C CompliantYes

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

Supersedes

DI-SESS-81939

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Description & Purpose

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Application & Interrelationship

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Use & Relationship

The Stress, Fatigue, and Fracture Analysis Report is the primary documentation for mechanical analysis performed during design of equipment. Within this document resides the methods, assumptions, and results to stress, fatigue, and fracture life assessments.

This DID contains the format, content, and intended use information for the data product resulting from the work task described in the contract Statement of Work (SOW).

This DID supersedes DI-SESS-81939.

Preparation Instructions

1Reference documentsNone.

2FormatContractor format.

3Content

3.1Title Pagecontaining the following:

3.1.1IdentificationThis paragraph shall contain a full identification of the system and the components to which this document applies, including, as applicable, part numbers.

3.1.2Title of CDRL and CDRL number

3.1.3Contract number

3.1.4Preparing activity or contractor's title

3.1.5Security classification, when required

3.1.6Distribution Statement

3.2Table of ContentsThe document shall contain a table of contents providing the number, title, and page number of each titled paragraph, figure, table, and appendix.

3.3ScopeThis section shall be divided into the following paragraphs.

3.3.1IdentificationThis paragraph shall contain a full identification of the system and the components to which this document applies, including, as applicable, part numbers.

3.3.2System overviewThis paragraph shall briefly state the purpose of the system and the components to which this document applies. It shall describe the general nature of the system and components of interest; summarize the history of system development, operation, and maintenance; identify the project sponsor, acquirer, user, developer, and support agencies; identify current and planned operating sites; and list other relevant documents.

3.3.3Document overviewThis paragraph shall summarize the purpose and contents of this document and shall describe any security or privacy considerations associated with its use.

3.4Referenced documentsThis section shall list the number, title, revision, and date of all documents referenced in this document. This section shall also identify the source for all documents not available through normal Government stocking activities.

3.5General analytical approachThis section shall detail the general approach to stress, fatigue, and fracture mechanics analysis used. If necessary, it can be broken into sections to accommodate subsets of components, which will fall under separate methodologies. This section shall include approach to modeling dynamic loads as applicable. This section shall include the acceptance criteria for stress, fatigue and fracture. This section shall also include what software tools are used for which components.

3.6System and component load definitionThis section shall detail internal and external loads acting on the system and component of interest. This section shall include justification for load assumptions as required. This section shall include or reference test data used to construct load assumptions.

3.7System and component boundary condition definitionThis section shall detail boundary conditions of the system and component of interest. This section shall include justification for boundary conditions.

3.8Material PropertiesThis section shall detail material properties information of the component(s) of interest. This section shall include references to sources or test data.

3.9Stress AnalysisThis section shall detail stress analysis of the component(s) of interest. Focus should be placed on regions, which show highest stress. This section shall demonstrate how stress is affected by changes in input conditions, environment, and other system parameters as applicable. If hand calculations are employed an example shall be explained in detail and reference made to an appendix with all additional calculations. Furthermore, any assumptions made for hand calculations shall be justified and documented in this section. For Finite Element analysis all modifications, simplifications, idealizations, and assumptions shall be explained, justified, and documented in this section.

3.10Fatigue AnalysisThis section shall present the component level fatigue analysis performed. The fatigue spectrum(s) with corresponding stress levels shall be presented in this section. Associated fatigue life damage per spectrum entry shall be presented. Fatigue knockdown factors shall be presented and justified in this section.

3.11Fracture MechanicsThis section shall present the component level fracture mechanics analysis performed. The fracture spectrum(s) with corresponding stress levels shall be presented in this section. Associated fracture growth per spectrum entry shall be presented. Fracture factors shall be presented and justified in this section.

3.12Validation RecommendationsThis section shall include a listing of recommended validation approaches for each component stress, fatigue, and fracture life claim. Provide specific locations for sensor placement during testing.

3.13NotesThis section shall contain any general information that aids in understanding this document (e.g., background information, glossary, rationale). This section shall include an alphabetical listing of all acronyms, abbreviations, and their meanings as used in this document and a list of any terms and definitions needed to understand this document.

3.14AppendixesAppendixes may be used to provide information published separately for convenience in document maintenance (e.g., charts, classified data). As applicable, each appendix shall be referenced in the main body of the document where the data would normally have been provided. Appendixes may be bound as separate documents for ease in handling. Appendixes shall be lettered alphabetically (A, B, etc.).

References

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