Month: February 2018

This past holiday season, every employee of Hill Engineering was generously gifted a copy of “Land of Wolves: The Return of Lincoln’s Bodyguard.” This book was written by Hill Engineering friend and collaborator, TJ Turner. The historical fiction thriller—set in an alternative historical timeline in which Abraham Lincoln was saved from assassination—is the page-turning sequel to “Lincoln’s Bodyguard,” which was also gifted to the Hill Engineering employees back in 2015. Continue reading Land of Wolves

In previous blog posts we have discussed various issues related to residual stress in welding. Here, we’ll follow up with a more detailed look at residual stress in additive manufactured parts, which is a form of welding. Additive manufacturing processes, including powder and wire-fed E-beam and laser, produce residual stress as an undesired consequence. Residual stress in additive manufactured parts results from thermal cycles, temperature gradients, and localized plasticity. Continue reading Residual stress in additive manufacturing

Hill Engineering gave a presentation about fatigue analysis of pipelines at the 2018 Pipeline Pigging & Integrity Management (PPIM) Conference in Houston, TX. PPIM is the industry’s only forum devoted exclusively to pigging for maintenance and inspection, as well as pipeline integrity evaluation and repair. Hill Engineering’s presentation, titled “Is the Paris Fatigue Crack Growth Relation the Only Model Appropriate for Pressure Cycle Fatigue Analysis of Pipelines,” included an overview of various fatigue analysis models for pipeline fatigue crack growth assessment. The abstract text is presented below. Continue reading Hill Engineering at Pipeline Pigging & Integrity Management Conference