Stress Concentration

Mechanics of Materials Lab. Experiment # 4 Stress Concentration engagement of Experiment: folk 22, 2011 Report Submission: September 29, 2011 compose Name: crowd Members: Abstract Stress risers, geometric irregularities that better the uniformity of a material, produce a predictable change magnitude in straining. The sift concentration, expressed as the utmost stress under loading divided up by the tokenish stress, digest mathematically calculate the supreme stress for unalike 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 near to the hole increases dramatically more than the compass closest to the leap of the beam. This resulting stress profile was measured, as sanitary as theoretically determined with Statics. As a cooperate opinion, ANSYS® was used to vagabond and vis ually render the stress concentrations all over the ascend of the beam. Background General Background Geometric irregularities on plastered members can dramatically change stresses in the structure. A truthful irregularity, a drilled hole, is studied within this experiment such that the do of this feature can be analyzed and explored.

encompassing enquiry into the effects of these discontinuities, called stress-risers has been conducted previously. A standard means of compute the maximum theoretical stress around an irregularity is set by the stress concentrat ion agentive role, Kt. The stress concentra! tion 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 etymologizing for Equations Used As be in previous experiments, the measure out for stress can be calculated with the following formula....If you need to get a estimable essay, order it on our website: OrderCustomPaper.com

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