(PC1211) σ & ε Concentration ƒactor

08142020, 06:14 PM
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(PC1211) σ & ε Concentration ƒactor
An excerpt from Stress and Strain Concentration Factor Evaluation Using the Equivalent Energy Concept, JAROSLAV POLÁK, Materials Science and Engineering, 61(1983)195200
"SUMMARY The energy approach to local stress and strain evaluation in a notch in materials with a power law type of hardening curve is generalized. The formulae for relative stress and strain concentration factor evaluation using the generalized equivalent energy method, the Neuber method and the HardrathOhman method are derived and the results are compared for low carbon steel … … 5. CONCLUSIONS (1) The generalized equivalent energy method yields stress and strain concentration factors dependent on the stressstrain relation of a particular metal and on the product of the nominal stress and theoretical stress concentration factor. The local stress and strain are obtained by a solution of an equation that is easy to program on a programmable calculator or a pocket computer. … APPENDIX A The program in BASIC (for a Sharp PC 1211 pocket computer) used to calculate the relative stress and strain concentration factors ×σ & ×ε depending on σ using the equivalent energy method, the Neuber method and the HardrathOhman method … … " BEST! SlideRule 

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