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11 03, 2020

3D Visual Image Correlation

Non-contact strain measurement Digital Image Correlation (DIC) technology provides three-dimensional measurements of shape, global displacement and relative displacement (strain) on the surface an object using an optical method. Generally, DIC systems involve two or more imaging sensors (cameras) to provide sufficient information to for the software to triangulate and track objects in three dimensions. With the help of a randomized speckle pattern applied to the object’s surface, DIC systems can resolve displacements into continuous stress and strain measurements within the area of focus. Some of the main advantages of DIC systems include: Suitable for small- and large-scale objects Capable [...]

22 02, 2020

Low Temperature Operations

Accounting for the harsh effects of cold temperature operations Operations in the Arctic and cold weather regions are challenging due to embrittlement of components, and generation of significant thermal stress loads, which can lead to structural cracking and failures under otherwise normal loading conditions. Temperature variations also change the elasticity and dimensions of sealing components leading to reduce performance and leaks.   For example bladder accumulators stiffen at cold temperatures, limiting their performance in safety systems such as blow out preventers and transient pressure suppression systems on pipelines. Rapid changes in equipment temperatures can cause differential expansion of components leading [...]

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