- document
-
Sun, Renjuan (author), Han, Lebing (author), Zhang, Hongzhi (author), Ge, Zhi (author), Guan, Yanhua (author), Ling, Yifeng (author), Schlangen, E. (author), Šavija, B. (author)This paper presents a study on cracking characterization of engineered cementitious composites (ECC) under flexural cyclic load using digital image correlation (DIC) technique. Five stress levels, namely 0.65, 0.75, 0.8, 0.85 and 0.9 of the flexural strength, were applied. Strain map at the side surface was obtained by DIC and used to drive...journal article 2022
- document
-
Yousefi, Armin (author), Jolaiy, Saman (author), Hedayati, R. (author), Serjouei, Ahmad (author), Bodaghi, Mahdi (author)Bonded patches are widely used in several industry sectors for repairing damaged plates, cracks in metallic structures, and reinforcement of damaged structures. Composite patches have optimal properties such as high strength‐to‐weight ratio, easiness in being applied, and high flexibility. Due to recent rapid growth in the aerospace industry,...journal article 2021
- document
-
Yousefi, Armin (author), Serjouei, Ahmad (author), Hedayati, R. (author), Bodaghi, Mahdi (author)In the present study, the fatigue behavior and tensile strength of A6061-T4 aluminum al-loy, joined by friction stir spot welding (FSSW), are numerically investigated. The 3D finite element model (FEM) is used to analyze the FSSW joint by means of Abaqus software. The tensile strength is determined for FSSW joints with both a probe hole and a...journal article 2021
- document
-
Xu, S. (author), Liu, X. (author), Tabakovic, A. (author), Schlangen, E. (author)Self-healing asphalt, which is designed to achieve autonomic damage repair in asphalt pavement, offers a great life-extension prospect and therefore not only reduces pavement maintenance costs but also saves energy and reduces CO<sub>2</sub> emissions. The combined asphalt self-healing system, incorporating both encapsulated rejuvenator and...journal article 2021
- document
-
de Krijger, Joep (author), Rans, C.D. (author), Van Hooreweder, B.S.K. (author), Lietaert, Karel (author), Pouran, B. (author), Zadpoor, A.A. (author)Additively manufactured (AM) porous metallic biomaterials are considered promising candidates for bone substitution. In particular, AM porous titanium can be designed to exhibit mechanical properties similar to bone. There is some experimental data available in the literature regarding the fatigue behavior of AM porous titanium, but the...journal article 2017
- document
- de Jonge, J.B. (author), Hol, P.A. (author), van Gelder, P.A. (author) report 1995
- document
-
Wanhill, R.J.H. (author)This report reviews currently available information on corrosion and fatigue in aircraft as a background to discussing the assessment of corrosion and fatigue damage. The main topics are: * aircraft operating environments and loads * corrosion * fatigue * corrosion and fatigue * corrosion and fatigue damage assessment. Aircraft structures are...report 1994
- document
-
de Jonge, J.B. (author)Many military aircraft are used more severely and over a longer periodthan originally intended. Consequently, a careful life management, including service load monitoring has become indispensable. This paper describes the development of a simple method to quantify the severity in terms of "potential crack growth" of recorded load spectra. This...report 1992
- document
-
de Jonge, J.B. (author), Bartelds, G. (author)The problems of Ageing Aircraft are worldwide. Hence, actions to overcome or prevent these problems should be taken in international collaboration. The Federal Aviation Administration FAA and the Netherlands Civil Aviation Department RLD have signed a Memorandum of Cooperation in the area of structural integrity, with specific reference to...report 1991
- document
-
Oldersma, A. (author)Composite materials with more than one type of fiber in one matrix are known as hybrid composites. In this work the fatigue behaviour of composite materials is discussed and the behaviour of hybrid composites is related to simple (single-fiber) composites. The properties and the behaviour of hybrid composites can mostly be explained...report 1991
- document
-
't Hart, W.G.J. (author)The damage development In notched (± 45, 0„, 90, 0-) carbon-epoxy coupon specimens tested under different loading conditions was determined. Constant amplitude tests at R = -1 and R = 0.1 as well as flight simulation tests were performed to establish those stress values for which no damage growth occurs.report 1988
- document
-
Lof, C.J. (author)Computer programs are described to be used for fracture control purposes. Crack growth lifetimes can be predicted for plane cracks in 3-D structures. Values for stress intensity (K-) distributions at crack fronts are derived from data being available from literature for a restricted number of simple configurations. For arbitrary configurations...report 1986
- document
-
de Jonge, J.B. (author)This report reviews the applicability of damage tolerance concepts to helicopter structures. After a general discussion of the damage tolerance concept, attention is paid to the specific aspects of the helicopter loading environment. Examples are presented of damage tolerant design, both in metal and in composite structures. However, it is felt...report 1986
- document
-
Kolkman, H.J. (author)The effect of penetrant on the fatigue life of single shear riveted lap joints was investigated by flight simulation fatigue tests using the MINITWIST gust spectrum. The penetrant/material combination investigated was ARDROX 985 P3T and aluminium alloy 202U-T3 sheet material (both bare and clad) respectively. The effect of penetrant on the...report 1982
- document
-
Nederveen, A. (author), de Jong, J.B. (author)The influence of the approximation of the lower end of the load spectrum was investigated by comparative tests using the Basic F-27 test programme and an extended version, containing three times more cycles per flight. Crack growth was studied on notched sheet specimens made of Alclad 202U-T3 and Alclad TOT5-T6. Fatigue life tests were done on...report 1981
- document
-
't Hart, W.G.J. (author), Nederveen, A. (author)Constant amplitude and flight simulation fatigue tests have been carried out on sulphuric acid, chromic acid and phosphoric acid anodized specimens. A comparison was made with the fatigue behaviour of bare sheet material. Before fatigue testing the fracture strain of the anodic layers was determined.report 1980
- document
-
Nederveen, A. (author), de Jonge, J.B. (author), Tromp, P.J. (author)The effects of systematic variations in mean stress level and in spectrum and ground load severity of a flight simulation test programme have been investigated on riveted specimens (fatigue life) and sheet specimens with central saw cut (crack growth). The fatigue life and crack propagation life in Alclad 202U-T3 compared with Alclad TOT5-T6...report 1980
- document
-
de Jonge, J.B. (author)Fokker-VFW is carrying out a completely new fatigue evaluation of the F-2T aircraft, covering lives up to 120000 flights. This evaluation includes; a)A complete inventory of the configuration status of the F-2T fleet, b)An inventory and evaluation of existing test experience, c)Evaluation of service experience, d)Analytical predictions of life...report 1978
- document
-
't Hart, W.G.J. (author), Nederveen, A. (author), Nassette, J.H. (author), van Wijk, A. (author)The influence of previous corrosion on fatigue crack initiation has been determined. Cylindrical specimens and flat specimens with a central hole of the aluminium alloy T075-T6 were corroded in a 3.5 % NaC1 solution. The cylindrical specimens were tested under constant amplitude loading while for the specimens with a central hole a block...report 1975