The effect of short time exposure to thermal cycle on the fatigue life of interference fitted fastener holes was evaluated by experimental and numerical method in Al-alloy 7075-T6. When interference fitted holes are subjected to temperature, the pre-stresses produced by interference fit may be considerably redistributed. To investigate the pre-stresses redistribution and its effect on the fatigue life of interference fitted specimens, two different temperatures (i.e. 60 ℃ and 120 ℃), apart from room temperature, were selected. The fatigue tests were performed to obtain S–N curves. Tangential pre-stress distribution was analyzed by the finite element method. Three-dimensional stress distributions of interference fit process have been determined around the hole at three temperatures: 25 ℃, 60 ℃, and 120 ℃. The finite element analyses justify the experimentally observed fatigue test behavior. The results show that the short period thermal cycle could improve the fatigue life of the prepared samples.
ChakherlouTNVogwellJ. The effect of cold expansion on improving the fatigue life of fastener holes. Eng Fail Anal2003; 10: 13–24.
2.
WenYLZhuYLHouShet al.Investigation on fatigue performance of cold expansion holes of 6061-T6 aluminum alloy. Int J Fatigue2017; 95: 216–228.
3.
YuanXYueZFWenSFet al.Numerical and experimental investigation of the cold expansion process with split sleeve in titanium alloy TC4. Int J Fatigue2015; 77: 78–85.
4.
De CastroPMSTDe MatosPFPMoreiraPMGPet al.An overview on fatigue analysis of aeronautical structural details: Open hole, single rivet lap-joint, and lap-joint panel. Mater Sci Eng A2007; 468–470: 144–157.
5.
AragónAAlegreJMGutiérrez-SolanaF. Effect of clamping force on the fatigue behaviour of punched plates subjected to axial loading. Eng Fail Anal2006; 13: 271–278.
6.
ChakherlouTNMirzajanzadehMVogwellJet al.Investigation of the fatigue life and crack growth in torque tightened bolted joints. Aerosp Sci Technol2011; 15: 304–313.
7.
ChakherlouTNMirzajanzadehMAbazadehBet al.An investigation about interference fit effect on improving fatigue life of a holed single plate in joints. Eur J Mech A Solids2010; 29: 675–682.
8.
BrownMAEvanJL. Fatigue life variability due to variations in interference fit of steel bushings in 7075-T651 aluminum lugs. Int J Fatigue2012; 44: 177–187.
9.
KleditzschSAwiszusaBLätzerMet al.Numerical and analytical investigation of steel–aluminum knurled interference fits: Joining process and load characteristics. J Mater Process Technol2015; 219: 286–294.
10.
ChakherlouTNTaghizadehHAghdamAB. Experimental and numerical comparison of cold expansion and interference fit methods in improving fatigue life of holed plate in double shear lap joints. Aerosp Sci Technol2013; 29: 351–362.
11.
ChakherlouTNMirzajanzadehMSaeediKh. Fatigue crack growth and life prediction of a single interference fitted holed plate. Fatigue Fract Eng Mater Struct2010; 33: 633–644.
12.
MohammadpourAChakherlouTN. Numerical and experimental study of an interference fitted joint using a large deformation Chaboche type combined isotropic–kinematic hardening law and mortar contact method. Int J Mech Sci2016; 106: 297–318.
13.
OzdemirATEdwardsL. Relaxation of residual stresses at cold-worked fastener holes due to fatigue loading. Fatigue Fract Eng Mater Struct1997; 20: 1443–1451.
14.
BergstromJEricssonT. Relaxation of shot peening induced compressive stress during fatigue of notched steel samples, Linkoping, Sweden: Linkoping Institute of Technology, 2004, pp. 571–581.
15.
LacaracVDSmithDJPavierMJ. The effect of cold expansion on fatigue crack growth from open holes at room and high temperature. Int J Fatigue2001; 23: 161–170.
16.
ClarkDAJohnsonWS. Temperature effects on fatigue performance of cold expanded holes in 7050-T7451 aluminum alloy. Int J Fatigue2003; 25: 159–165.
17.
Schulze V, Lang KH, Vöhringer O, et al. Relaxation of shot peening induced residual stresses in quenched and tempered steel AISI 4140 due to uniaxial cyclic deformation. In: Conference proceedings, ICSP-6, 1996, pp.385–396.
18.
MinguezJMVogwellJ. Fatigue life of an aerospace aluminum alloy subjected to cold expansion and a cyclic temperature regime. Eng Fail Anal2006; 13: 997–1004.
19.
PolmearIJPonsGOctorHet al.After Concorde: Evaluation of an Al–Cu–Mg–Ag alloy for use in the proposed European SST. Mater Sci Forum1996; 217–222: 1759–1764.
20.
ChakherlouTNAghdamAB. An experimental investigation on the effect of short time exposure to elevated temperature on fatigue life of cold expanded fastener holes. Mater Des2008; 29: 1504–1511.
21.
De MatosPFPMoreiraPMGPCamanhoPPet al.Numerical simulation of cold working of rivet holes. Finite Elem Anal Des2005; 41: 989–1007.
22.
Swanson Analysis Systems Inc. ANSYS, Revision 13.
23.
RoysterDM. Tensile properties and creep strength of three aluminum alloys exposed up to 25000 hours at 200–400 F, Hampton, VA: Langley Research Center, 1969.
24.
StowellEZ. A phenomenological relation between stress, strain rate and temperature for metals at elevated temperature, Langley Field, VA: Langley Aeronautical Laboratory, National Advisory Committee for Aeronautics, 1957.
25.
Properties and selection: nonferrous alloys and special-purpose materials. In: Metals handbook. 10th ed. vol. 2. Materials Park, OH: ASM International, 1990.
