Category: Uncategorized
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In How to Calculate Lug Stresses we spoke about lugs being a great way to transmit mechanical load when used with a clevis pin. The following equations will allow us to size the correct size pin for this application. Pin Bending Stress As a conservative approach, the load on the pin can be assumed as…
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Essentially, a lug is just a plate with a hole in it! But when used with a clevis pin lugs are a useful way to transmit mechanical load through mechanical components with quick and easy installation. There are several failure modes to consider when it comes to sizing a lug. The following simplified method will…
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For the following calculations we will only consider plates of uniform thickness and with a uniformly distributed load over the entire surface. This will help us define minimum thickness’ for components such as pressure vessels or piston housings. Simply Supported The maximum bending stress of a simply supported plate can be calculated by: Stress at centre of plate a=plate…
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For the following calculations we will only consider plates of uniform thickness and with a uniformly distributed load over the entire surface. This will help us define minimum thickness’ for components such as pressure vessels or piston housings. For the purpose of sizing calculations we can assume that for a bolted junction a simply supported equation is appropriate. For…
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Learn about cylindrical stress in pressurised components, including hoop and longitudinal stress calculations, with important safety considerations for real-world applications.
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An out-of-plane load applied to a bracket will cause a simultaneous tensile and shear load to be applied to the bolts. The following equations will help size fasteners for respective load cases. Minimum edge distance for bolt holes should be 1.25D minimum Tensile force in each bolt Increasing Lx or decreasing Lz will result in…
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A guide to sizing and installing fasteners, covering tensile/shear stress calculations, pre-load requirements, installation torques, and bolt elongation measurements.
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Understanding engineering limits and fits are a staple for every engineer in order to create well functioning mechanical assemblies. In this article we are going to focus on slip fit vs press fit. What are the key differences, the advantages and disadvantages of both and some practical examples.
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Similar to other geometric tolerance group, run-out can be split into two categories, a 2D (circular run-out) and 3D (total run-out) variant. Circular run-out can control the circularity of a feature relative to the components axis bounded by a 2D tolerance zone. This can be considered as measuring a combination of the component’s co-axiality and…
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Total run-out can control the cylindricality of a feature relative to the components axis bounded by a 3D tolerance zone combing the applied control of co-axiality and cylindricality. Unlike circular run-out, total run-out is a measure of the full length of the applied surface as the part is rotated. Controlling other Features with Run-Out Both…