 Wysłany: Nie 0:16, 16 Sty 2011 Temat postu: Crankshaft Fracture Analysis of three-dimensional |
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| Crankshaft Fracture Analysis of three-dimensional photoelastic
Threshold values were 300N/mm. And 5.87MPam4 fatigue life estimation and testing cycle to take the ship buildings crankshaft inspection cycle (ie, vessel inspection cycle) ‰ for the life of the I / 2, the inspection cycle T = r, 2. Taking into account the photoelastic model material and the value of ductile Chiang Iron worry about the quality Results arrest of steel different,belstaff italia, selenium amended,microsoft outlook, respectively, equation (6) and (7) for numerical integration,christian louboutin pas cher, corresponding to different crack size pox labor life and inspection cycle are listed in Table 3 and Table 4. In which the data listed in Table 4 are somewhat conservative, which is given to 8NVD48A-2U type j crankshaft system of foreign products are not sufficiently aware of its production process; if domestic imitation, its composition,moncler uomo, performance and a great difference; to consider shipping absolute safety of navigation, cross a certain safety margin to increase. Table 36160A crankshaft fatigue life and test the periodic table 48NVD48A-2U crankshaft Sheng Lo and test life cycle of crack size (mm) 0500550600650.700800901.0C Ⅳ 0, hlOlf ~ 604163718499879544291294439168h508302081892494397221464721984 Table 3 and Table 4 data show that the fatigue life of the crankshaft with a crack With the increase of crack size decreased rapidly, but still have enough carrying capacity limits as long as the strict control of the inspection cycle of surface crack at a certain depth range, the crankshaft is normal use. Thus changing the requirements of the traditional theory of fatigue strength and crack-free surface, the concept of the crankshaft,Mont Blanc pens, update and enrich the existing ship construction and testing specification 5 Conclusion D6160A crankshaft axis faults in the structural design of the station management did not, so borrowing norms as a river with ships, defect in the design of the crankshaft; by plane and solving the combination of three-dimensional photo-elastic stress intensity factor of cracked crankshaft and its form factor is both accurate and economical and easy way; crankshaft crack growth should be based on characteristic parameters of crack propagation area was more reasonable, knock on the Paris formula should be properly amended. |
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