A continuum damage mechanics-based approach is proposed to predict the fatigue life of 7050-T7451 aluminum alloy that has undergone foreign object impact damage. Lemaitre’s plasticity damage model is adopted to evaluate the damage field arisen from impact. Then Chaudonneret’s damage model is applied to the fatigue damage accumulation caused by cyclic loading. The numerical dynamic analysis simulating the foreign object impact process is conducted to obtain the plastic strain history and the residual stress field. Fatigue damage evolution is implemented by the finite element method via coupling operations on the damage field and the stress field. The fatigue test for specimens with an impact pit is conducted to validate the aforementioned approach. The predicted life and the site of crack initiation are in accordance with the test results. Finally, the effects of impact plastic damage, residual stress, impact pit depth, and radius on the fatigue life are investigated.
BoyceBChenXPetersJ (2003) Mechanical relaxation of localized residual stresses associated with foreign object damage. Materials Science and Engineering349(1): 48–58.
2.
ChabocheJLesneP (1998) A nonlinear continuous fatigue damage model. Fatigue & Fracture of Engineering Materials & Structures11(1): 1–17.
3.
ChabocheJ-L (1981) Continuous damage mechanics—A tool to describe phenomena before crack initiation. Nuclear Engineering and Design64(2): 233–247.
4.
ChaudonneretM (1993) A simple and efficient multiaxial fatigue damage model for engineering applications of macro-crack initiation. Journal of Engineering Materials and Technology115(4): 373–379.
5.
DhattGLefrançoisETouzotG (2012) Finite Element Method, Hoboken: John Wiley & Sons, pp. 1–10.
6.
GoughHPollardH (1935) The strength of metals under combined alternating stresses. Proceedings of the Institution of Mechanical Engineers131(1): 3–103.
HolzapfelHSchulzeVVöhringerO (1998) Residual stress relaxation in an AISI 4140 steel due to quasistatic and cyclic loading at higher temperatures. Materials Science and Engineering248(1): 9–18.
9.
KachanovL (1986) Introduction to Continuum Damage Mechanics, Netherlands: Springer, pp. 1–10.
10.
LeeCSKimMHLeeJM (2011) Computational study on the fatigue behavior of welded structures. International Journal of Damage Mechanics20: 423–463.
11.
LemaitreJDesmoratR (2005) Engineering Damage Mechanics: Ductile, Creep, Fatigue and Brittle Failures, New York: Springer, pp. 188–189.
12.
LemaitreJLippmannH (1996) A Course on Damage Mechanics, Berlin: Springer, pp. 1–10.
13.
LemaitreJ (1994) Mechanics of Solid Materials, New York: Cambridge University Press, pp. 346–449.
14.
MarandiSMRahmaniKTajdariM (2014) Foreign object damage on the leading edge of gas turbine blades. Aerospace Science and Technology33(1): 65–75.
15.
PetersJRitchieR (2000) Influence of foreign-object damage on crack initiation and early crack growth during high-cycle fatigue of Ti–6Al–4V. Engineering Fracture Mechanics67(3): 193–207.
16.
PetersJRitchieR (2001) Foreign-object damage and high-cycle fatigue of Ti–6Al–4V. Materials Science and Engineering319: 597–601.
17.
RuschauJJNicholasTThompsonSR (2001) Influence of foreign object damage (FOD) on the fatigue life of simulated Ti-6Al-4V airfoils. International Journal of Impact Engineering25(3): 233–250.
18.
SchijveJ (2008) Fatigue of Structures and Materials, New York: Springer, pp. 1–10.
19.
SocieD (1977) Fatigue-life prediction using local stress-strain concepts. Experimental Mechanics17(2): 50–56.
20.
SridharBDevanandaGRamachandraK (2003) Effect of machining parameters and heat treatment on the residual stress distribution in titanium alloy IMI-834. Journal of Materials Processing Technology139(1): 628–634.
21.
StulenFCummingsH (1954) A failure criterion for multi-axial fatigue stresses. Proceedings-American Society for Testing and Materials54: 822–835.
22.
SureshS (1998) Fatigue of Materials, Cambridge, UK: Cambridge University Press, pp. 1–15.
23.
TimoshenkoSPGereJM (2009) Theory of Elastic Stability, New York: Courier Dover Publications, pp. 1–20.
24.
Van DoVNLeeCHChangKH (2015) High cycle fatigue analysis in presence of residual stresses by using a continuum damage mechanics model. International Journal of Fatigue70: 51–62.
25.
WangZPHuRXKangST (2011) LS_DYNA Nonlinear Finite Element Analysis, Beijing: Mechanical Industry Press, pp. 44–45.
26.
WickASchulzeVVöhringerO (2000) Effects of warm peening on fatigue life and relaxation behaviour of residual stresses in AISI 4140 steel. Materials Science and Engineering293(1): 191–197.
27.
WuXR (1998) Handbook of Mechanical Properties of Aircraft Structural MetalsVol. 1, Beijing: Aviation Industry Press, pp. 433–434.
28.
ZhangMMengQCHuWP (2010) Damage mechanics method for fatigue life prediction of pitch-change-link. International Journal of Fatigue32(10): 1683–1688.
29.
ZhangTMcHughPLeenS (2012) Finite element implementation of multiaxial continuum damage mechanics for plain and fretting fatigue. International Journal of Fatigue44: 260–272.
