document

Fatigue behaviour of joints between rectangular hollow sections: T-Joints, Part 2, Comparison of strain concentration factors between results of numerical analyses and experimental work, (brace in tension)

van Wingerde, A.M. (author), Puthli, R.S. (author), de Koning, C.H.M. (author), Wardenier, J. (author), Dutta, D. (author)

report 1987

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Prediction of fatigue crack growth

de Koning, A.U. (author)

As an introduction the practical significance of fatigue crack growth life prediction is related to the service life, the inspection period and the fracture control requirements. Then different aspects of fatigue crack growth in metallic materials are discussed in more detail. Important effects such as chemical environment, short cracks, crack...

report 1987

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Fatigue behaviour of joints between rectangular hollow sections: X-Joints, Part 3, Numerical analyses of strain concentration factors using nominal dimensions, with brace in tension

Puthli, R.S. (author), de Koning, C.H.M. (author), Wardenier, J. (author), Dutta, D. (author)

report 1987

document

Fatigue behaviour of joints between rectangular hollow sections: X-Joints, Part 2, Comparison of strain concentration factors between results of numerical analyses and experimental work, with brace in tension

Puthli, R.S. (author), de Koning, C.H.M. (author), Wardenier, J. (author), Dutta, D. (author)

report 1987

document

Fatigue behaviour of joints between rectangular hollow sections: X-Joints, Part 1, Appendix I - XIV, Appendix A, B, C

de Koning, C.H.M. (author), Puthli, R.S. (author), Wardenier, J. (author), Dutta, D. (author)

report 1987

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Results of verification of crack growth models (Work package 7 of ESA contract 5826/84/NL/PB(SC))

de Koning, A.U. (author), Schra, L. (author)

Crack growth prediction methods were evaluated and a preliminary selection was made of models that appear to be applicable to ESA space structures. In this report predictions based on the candidate models are verified by comparison with experimental results. Test configurations, materials and initial defects are specified as well as the load...

report 1986

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Criteria for determination of significant load cycles in variable amplitude load sequences

de Koning, A.U. (author), Liefting, G. (author)

Presented at: The International Symposium on fatigue crack closure. May 1986, Charleston

report 1986

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Analysis of crack opening behaviour by application of a discretised strip yield model

de Koning, A.U. (author), Liefting, G. (author)

The crack opening behaviour of a fatigue crack in a centrally cracked panel was studied using a discretised version of the Dugdale and Barenblatt model. The effect of crack growth was also included. Results obtain ed for constant amplitude loading were in agreement with data reported in the open literature. The effect of application of single...

report 1986

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A study on strain concentration factors of square hollow section x-joints with brace in tension

Puthli, R.S. (author), de Koning, C.H.M. (author), Wardenier, J. (author), Dutta, D. (author)

report 1986

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The static strength of welded joints between structural hollow sections or betweeen structural hollow sections and H-sections: Part 3: joints between structural hollow section bracings and a H-section chord

de Koning, C.H.M. (author), Wardenier, J. (author)

report 1985

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A verification plan for crack growth prediction methods

de Koning, A.U. (author)

Crack growth prediction methods were evaluated and a preliminary selection was made of models that appear to be applicable to ESA space structures. In this report a plan is formulated for verification of the candidate models. Test configurations, materials and initial defects are specified as well as experimental procedures to be used for...

report 1985

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Finite element analyses of stable crack growh in thin sheet material

de Koning, A.U. (author)

This study deals with fracture mechanics aspects of mode 1 crack growth under montonically increasing (quasi-static) loads. Using the finite element method stable crack growth and the plastic deformation fields associated with this process are analyzed. A two parameter approach is proposed for a description of initiation and subsequent stable...

report 1985

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Crack growth prediction methods: part II: selection

de Koning, A.U. (author)

In part 1 of this study criteria were specified for evaluation and selection of crack growth models and computer programs for prediction of fatigue crack growth rates. In part 2 the criteria are used to compare different computer programs available to ESA. The programs involved are FLAGR04 (distributed by COSMIC), NASGRO (developed by NASA),...

report 1985

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The static strength of welded joints between structural hollow sections or between structural hollow sections and H-sections: Part 2: Joints between rectangular hollow sections

de Koning, C.H.M. (author), Wardenier, J. (author)

report 1984

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The static strength of welded joints between structural hollow sections or between structural hollow sections and H-sections: Part 1: Joints between circular hollow sections

de Koning, C.H.M. (author), Wardenier, J. (author)

report 1984

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Crack growth prediction methods: part I: a survey

de Koning, A.U. (author)

Recently, ESA prepared "Fracture Control Guidelines" for STS (Space Transportation System) payloads to meet NASA requirements. In this study applicability of fracture mechanics principles to fatigue crack growth and failure is discussed. Different effects such as threshold, fracture toughness and load ratio and the behaviour of short cracks are...

report 1984

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Mechanical jointing in aramid fibre composites: An experimental study

de Koning, C.A.M. (author), Dreumel, W.H.M. (author)

report 1983

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The static strength of welded k-joints with a rectangular chord

de Koning, C.H.M. (author), Wardenier, J. (author)

report 1983

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New analytical methods for the prediction of fatigue crack growth under realistic loading

van der Linden, H.H. (author), de Koning, A.U. (author), Lof, C.J. (author)

After a discussion of some aspects of aircraft design philosophy and the fatigue phenomenon, two analytical techniques for prediction of crack growth rates are described. The first method includes a model for prediction of fatigue crack growth in aluminium alloy sheet specimens subjected to service loading conditions. The second method involves...

report 1982

document

Mechanica van het oprekken van gaten - Analysis of deformation and stresses near cold worked holes

de Koning, A.U. (author)

In this report formulas are derived for a description of the deformation and stress fields near holes expanded by cold working. The results are compared with values obtained experimentally and calculated using the finite element method. The model of the material includes linear hardening and a yielding behaviour according to Tresca's criterion....

report 1982