Abstract
For carrying out the precise cropping of metal bar with different geometrical sizes, it is very important to obtain the reasonable stress intensity factor of V-shaped notch tip rapidly and accurately. At first, a new precise cropping method, which is the high-speed peripheral low-stress bending fracture cropping is presented in the paper, and its working mechanism is also given in detail. The stress field near V-shaped notch tip is analyzed, and the stress extrapolation method is presented to compute the stress intensity factor of V-shaped notch tip. Based on it, the correctional expression of theoretical stress intensity factor in a handbook of stress intensity factor is also given. The contrasts between stress intensity factor results obtained by means of the stress extrapolation method and the corresponding theoretical results in the handbook of stress intensity factor are also carried out in detail. The results show that the two errors are not more than 5 % and are within a reasonable engineering range. The cropping experimental results for initial loading force and crack propagation life have also confirmed that the correctional expression of theoretical stress intensity factor is feasible.
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References
Lin JZ (1988) Fracture and fatigue of metal materials. China Railway, Beijing
Qiao BM (2010) Computation of crack stress intensity factor based on FEM. Journal of XI’AN University of Science and Technology 30(5):629–632
Wang W (2010) Calculate the stress intensity factor by the finite element software ANSYS. World Build Mater 31(2):76–78
Chen JJ, Huang Liu YG (2010) Analysis of finite element model for calculating stress intensity factor based on crack-tip singular element. Ship Build China 51(3):56–64
Ji WY, Chen R (2008) Calculation of stress intensity factors with ANSYS. J Nantong Vocat Coll 22(2):92–94
Chen MC, Song GH (1997) A displacement dislocation method for evaluating stresses and stress intensity factor along a mixed-mode crack. Journal of East China Jiaotong University 14(1): 41-45, 54.
Xu H, Wu XZ, Cheng SP, Li YF, Long CH, Deng CS (2007) Finite element analysis of stress intensity factor in composite mode crack. J Cent S Univ Technol 38(1):79–83
Wang LQ, Gai BZ (2008) Numerical investigation on stress intensity factors for a semi-elliptical crack at the T-root groove of a turbine disc. Proc CSEE 28(32):76–81
Chinese Institute of Aeronautics (1993) Handbook of stress intensity factor. Science, Beijing
Zhang LJ, Zhao SD, Hua CJ, Guo CF, Lei J (2008) Investigation on a new type of low-stress cropping system with variable frequency vibration. Int J Adv Manuf Technol 36(3–4):288–295
Hua CJ, Zhao SD (2009) Research on the computer measurement and control system of the cropping method with variable-frequency vibration and low energy-consumption. Mach Des Manuf 9:72–74
Zheng XL (1994) Metal fatigue quantitative theory. Northwestern. Northwestern Polytechnical University Press, Xi’an
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Zhang, L., Zhao, Y. & Xiang, H. Research of stress intensity factor of V-shaped notch tip in precision cropping. Int J Adv Manuf Technol 65, 549–555 (2013). https://doi.org/10.1007/s00170-012-4194-0
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DOI: https://doi.org/10.1007/s00170-012-4194-0