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153 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398
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164 SAE approximation for
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165 Common curve fit for If complete reversed stress is given Low cycle fatigue,
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167 4-9 Endurance limit modification factors
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168 For axial loading no size effect Effect dimension (without rotation or noncircular cross section: Area with.95 stress area: For non rotation or hollow round Set 4-21=4-22 A rectangular cross section
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170 Loading factor k c
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171 Temperature factor k d
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172 Reliability factor k e Table A-10
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173 Miscellaneous-effects factor k f residual stress
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174 Corrosion Electrolytic plating Metal spray Cyclic frequancy Frettage corrosion
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179 For cycles of failure are less than 106
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188 From fig. 4-23 Stress ratio And Steady stress component stress concentration factor: Avoid localized plastic strain: When plastic strain can not be avoided:
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192 Soderberg line Modified Goodman Gerber failure criteria ASME Langer first cycle yield criteria Safety factor
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208 For many brittle material: Implied that
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212 For mix moding mode: 1.Use fully corrected endurance limit for bending, S e. 2.Apply stress concentration factors to torsional bending and axial stress components. 3.Multiply any alternating axial stress component by the factor 1/k c,ax. 4.Enter the resultant stress in to a Mohr’s circle analysis and find the principle stresses. 5.Find the Von mises stress 6.Compare Von mises stress with S a.
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222 The equation of the virgin material failure line:
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