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Classes #5, 6, 7, 8 Classes #5, 6, 7, 8 Civil Engineering Materials – CIVE 2110Civil Engineering Materials – CIVE 2110

Stress ConcentrationStress Concentration

Fall 2010Fall 2010Dr. GuptaDr. GuptaDr. PickettDr. Pickett

Stress ConcentrationComplex stress distributions occur at locations of ;- Concentrated loading- Abrupt changes in member cross section

MAX Normal Stresswill occur atSmallest cross sectional area.

K = Stress Concentration factorσaverage=P/Asmallest cross section

averageMAX K

Stress ConcentrationComplex stress distributions occur at locations of;- Concentrated loading- Abrupt changes in member cross section

MAX Normal Stresswill occur atSmallest cross sectional area.

K = Stress Concentration factorσaverage=P/Asmallest cross section

averageMAX K

Stress ConcentrationMAX Normal Stress will occur atSmallest cross sectional area.

K = Stress Concentration factordepends on – member geometry - type of discontinuity

σaverage=P/Asmallest cross section

averageMAX K

Stress ConcentrationMAX Normal Stress will occur atSmallest cross sectional area.

K = Stress Concentration factordepends on – member geometry - type of discontinuity

σaverage=P/Asmallest cross section

averageMAX K

Stress Concentration -Problem: # 4-88-Pg. 180-Hibbeler, 7th edition

Stress Concentration -Problem: # 4-95-Pg. 181-Hibbeler, 7th edition