Abstract
In this study, a Cohesive Zone Model (CZM) was used to predict the progressive failure behavior of adhesive joining of a domeseparated composite pressure vessel according to variation in the temperatures. A set of cohesive zone parameters for the adhesive material were obtained through Mode I, Mode II, and Mixed Mode I/II interfacial fracture toughness tests. In order to evaluate the effect of temperature on the interfacial fracture toughness, in situ temperature environments were simulated in the range -30 to 60oC, using an environmental chamber and furnace. The double-lap joint test was suggested as a way to verify the proposed CZM and simulation procedure. It was found that good accuracy in the prediction of debonding loads, and the damage onset and growth of adhesive joining, was obtained between the numerical predictions and the experimental results. The results of progressive failure analysis of the adhesive joining of the dome-separated composite pressure vessel showed that the maximum debonded length was predicted to be about 6.0% of the total adhesive length and that the damage onset and propagation behavior of the adhesive joining showed a similar tendency under room and low-temperature environments. However, in the high-temperature environment (60oC), the debonding of the adhesive joining tended to propagate early and quickly compared to the same action under room and low-temperature conditions.
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Abbreviations
- a:
-
crack length
- b:
-
width of the specimen
- c:
-
lever length
- E1f :
-
modulus of elasticity in the fiber direction measured in flexure
- GI :
-
mode I energy release rate
- GII :
-
mode II energy release rate
- GIC :
-
critical energy release rate for mode I
- GIIC :
-
critical energy release rate for mode II
- GC :
-
sum of GIC and GIIC
- GT :
-
total energy release rate
- GII/GT :
-
mixed mode ratio
- h:
-
half-thickness of specimen
- K:
-
cohesive stiffness
- L:
-
half-span of specimen
- N:
-
interfacial normal tensile strength
- P:
-
load
- ri :
-
radius of random place on the dome
- ro :
-
opening radius
- rc :
-
radius of cylinder
- S:
-
interfacial sliding shear strength
- T:
-
interfacial scissoring shear strength
- ti :
-
thickness of random place on the dome
- tc :
-
thickness of cylinder of composite pressures vessel
- ai :
-
winding angle of random place on the dome
- ac :
-
winding angle of cylinder of composite pressures vessel
- δ:
-
displacement
- δf :
-
cohesive ductility
- ti(i=1,2,3):
-
interfacial normal or shear tractions for pure mode i
- tult :
-
ultimate stress
- χ:
-
crack length correction parameter
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Acknowledgements
This work supported by the Agency for Defense Development (ADD) and the National Research Foundation of Korea (NRF) grant funded by the Korea government (MOE) (No. 2015R1D1A1A01060 750).
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Im, JM., Kang, SG., Shin, KB. et al. Prediction of onset and propagation of damage in the adhesive joining of a dome-separated composite pressure vessel including temperature effects. Int. J. Precis. Eng. Manuf. 18, 1795–1804 (2017). https://doi.org/10.1007/s12541-017-0208-z
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DOI: https://doi.org/10.1007/s12541-017-0208-z