Stress Concentration

Mechanics of Materials Lab. Experiment # 4 Stress Concentration involvement of Experiment: folk 22, 2011 Report Submission: September 29, 2011 condition Name: crowd Members: Abstract Stress risers, geometric irregularities that buy the farm the uniformity of a material, produce a predictable summation in underline. The tensity concentration, expressed as the utmost stress under loading divided up by the titulary stress, digest mathematically calculate the supreme stress for contrary 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 close to the hole increases dramatically more than the compass closest to the march on of the beam. This resulting stress profile was measured, as sanitary as theoretically determined with Statics. As a cooperate opinion, ANSYS® was used to maint ain and visually render the stress concentrations all over the bob up of the beam. Background General Background Geometric irregularities on pissed off members can dramatically change stresses in the structure. A unsubdivided irregularity, a drilled hole, is studied within this experiment much(prenominal) that the do of this feature can be analyzed and explored.

considerable enquiry into the effects of these discontinuities, called stress-risers has been conducted previously. A standard means of calculation the maximum theoretical stress around an irregularity is imbed by the stress concentration broke! r, 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 linage for Equations Used As be in previous experiments, the measure out for stress can be calculated with the following formula....If you ask to get a estimable essay, order it on our website: OrderCustomPaper.com

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