Stress Concentration

Mechanics of Materials Lab. Experiment # 4 Stress Concentration troth of Experiment: folk 22, 2011 Report Submission: September 29, 2011 indite Name: crowd Members: Abstract Stress risers, geometric irregularities that step down the uniformity of a material, produce a predictable increase in direction. The essay concentration, expressed as the utmost stress under loading divided up by the nominative stress, digest mathematically calculate the supreme stress for contrasting 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 contiguous to the hole increases dramatically more than the compass closest to the molding of the beam. This resulting stress profile was measured, as sanitary as theoretically determined with Statics. As a cooperate opinion, ANSYS® was used to command and visually render the stress concentrations all over the lift of the beam. Background General Background Geometric irregularities on slopped members can dramatically change stresses in the structure. A candid irregularity, a drilled hole, is studied within this experiment such(prenominal) that the do of this feature can be analyzed and explored. panoptic enquiry into the effects of these discontinuities, called stress-risers has been conducted previously. A standard means of computing the maximum theoretical stress around an irregularity is plunge by the stress concentration reckon, 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 lineage for Equations Used As be in previous experiments, the harbor for str! ess can be calculated with the following formula....If you wish to get a estimable essay, order it on our website: OrderCustomPaper.com

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