Analytical Methodology of Predicting Mode Ⅰ Stress Intensity Factor for Cracked Panels with Bonded Stiffener

Abstract

Abstract: Abstract： A theoretical model for distribution of bridging traction in bonded stiffeners which functioned as crack retarder was proposed. An analytical methodology of assessment mode Ⅰ stress intensity factor for cracked panels with bonded stiffeners was developed based on superposition principles. The analysis included the stress intensity factor solution for cracked skin due to broken and intact stiffeners by using displacement compatibility approach, and the stress intensity factor solution for cracked panels due to bridging stiffener. The methodology was verified by using the finite element method (FEM) and the experimental data from various literature sources. The results show that the theoretical model is effective in obtaining the bridging stress and mode Ⅰ stress intensity factor for cracked panels with bonded stiffeners.

Key words: Key words： bonded stiffener panel, crack retarder, bridging stress, stress intensity factor, virtual crack closure technique (VCCT)

CLC Number:

O 346.1

HE Shijiu,ZHANG Xiaojing,WANG Hai. Analytical Methodology of Predicting Mode Ⅰ Stress Intensity Factor for Cracked Panels with Bonded Stiffener[J]. Journal of Shanghai Jiaotong University, 2016, 50(02): 251-256.

References

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