Typically, a bolt is tensioned (preloaded) by the application of a torque to either the bolt head or the nut. Each method has a range of uncertainties associated with it, some of which are very substantial. The preload target can be achieved by a variety of methods: applying a measured torque to the bolt, measuring bolt extension, heating to expand the bolt then turning the nut down, torquing the bolt to the yield point, testing ultrasonically, or by applying a certain number of degrees of relative rotation of the threaded components. In both the tension and shear joint design cases, some level of tension preload in the bolt and resulting compression preload in the clamped components is essential to the joint integrity.
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For cyclic tension loads, the fastener is not subjected to the full amplitude of the load as a result, the fastener's fatigue life is increased or, if the material exhibits an endurance limit, its life extends indefinitely.Proper joint design and bolt preload provides useful properties: Joints that allow rotation include clevis linkages, and rely on a locking mechanism (like lock washers, thread adhesives, and lock nuts). Other such shear joints do not employ a preload on the bolt as they are designed to allow rotation of the joint about the bolt but use other methods of maintaining bolt/joint integrity. A preload is still applied but consideration of joint flexibility is not as critical as in the case where loads are transmitted through the joint in tension. Tension loads on such a joint are only incidental. The second type of bolted joint transfers the applied load in shear of the bolt shank and relies on the shear strength of the bolt. If the external tension forces overcome the clamp load (bolt preload) the clamped joint components will separate, allowing relative motion of the components. The joint should be designed such that the clamp load is never overcome by the external tension forces acting to separate the joint. Validate that the technical structures are fit for purpose.In a tension joint, the bolt and clamped components of the joint are designed to transfer an applied tension load through the joint by way of the clamped components by the design of a proper balance of joint and bolt stiffness.Deliver developments (from ideation to design to implementation) and adjustments of existing data ingestions, analytics or interfacing.Prepare large, complex data sets for further manipulation by data analysts and data scientists.Create, maintain and optimize data pipelines, IT architectures and data models in Azure and SQL relational databases.
Provide expertise to support the R&D teams in optimizing the efficiency of their internal data processes.As part of a cross-functional team, you will work closely together with other data engineers, data scientists and IT experts. As a Data Engineer in Corporate R&D, you play a key technical role in the design, development and maintenance of a modern data platform to drive operational efficiency and facilitate data driven insights for our colleagues in research and development.
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