Page 35 - Mechanical Engineer's Data Handbook
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24                                                  MECHANICAL ENGINEER’S DATA  HANDBOOK

                                                         End of parallel fillet weld, K = 2.7









                         r
                                -T

              Welds

                                                         Tee butt joint sharp corner, K = 2.0
             Reinforced butt weld, K = 1.2













             Toe of  transverse fillet weld, K = 1.5

                                                         Typical stress concentration factors for various features

                                                         Component             K

                                                         Keyways               1.36-2.0
                                                         Gear teeth            1.5-2.2
                                                         Screw threads         2.2-3.8






              1.4  Bending of beams


             Beams  generally  have  higher  stresses than  axially   To simplify the analysis, beams are usually regarded
             loaded members and most engineering problems in-   as being either ‘simply supported’ at the ends or ‘built
             volve bending. Examples of beams include structural   in’. In practice, the situation often lies between the two.
             members, shafts, axles, levers, and gear teeth.
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