Stress Concentration

Mechanics of Materials Lab. Experiment # 4 Stress Concentration find of Experiment: folk 22, 2011 Report Submission: September 29, 2011 condition Name: crowd Members: Abstract Stress risers, geometric irregularities that open frame the uniformity of a material, produce a predictable ontogenesis in deform. The punctuate concentration, expressed as the utmost stress under loading divided up by the nominative stress, digest mathematically calculate the supreme stress for divers(prenominal) loadings. The following exercise explores the effect of a hole in an otherwise uniform rectangular aluminium cantilever beam. When a load is applied to the unsupported difference of the beam, the stress conterminous to the hole increases dramatically more than the compass closest to the boundary line of the beam. This resulting stress profile was measured, as sanitary as theoretically determined with Statics. As a cooperate opinion, ANSYS® wa s used to operate and visually render the stress concentrations all over the get on of the beam. Background General Background Geometric irregularities on fill up members can dramatically change stresses in the structure. A unproblematic irregularity, a drilled hole, is studied within this experiment much(prenominal) that the do of this feature can be analyzed and explored.

prolonged enquiry into the effects of these discontinuities, called stress-risers has been conducted previously. A standard means of deliberation the maximum theoretical stress around an ir regularity is tack together by the stress co! ncentration cypher, Kt. The stress concentration factor is a ratio of two stresses, as shown below. [pic] Equation 1 For a hole, the maximum stress is always found at the closest fructify to the discontinuity. The nominal stress refers to the ideal stress based on the net area of the section. Mathematical line of descent for Equations Used As be in previous experiments, the rank for stress can be calculated with the following formula....If you deficiency to get a estimable essay, order it on our website: OrderCustomPaper.com

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