Entries by Structural Integrity

News & Views, Volume 50 | SI FatiguePRO for Hydrogen Fueling Station Assets

VESSEL LIFE CYCLE MANAGEMENT By:  Erick Ritter and Daniel Peters Initial introduction of many of the hydrogen fueling stations to support this rapidly growing demand were installed around 2010. There were many designs of cylinders developed and installed at that time, many with known limitations on the life of the equipment due to the high pressures […]

News & Views, Volume 50 | Reactor Vessel Integrity

FRACTURE TOUGHNESS CRITERIA By:  Tim Griesbach and Dan Denis The integrity of the nuclear reactor pressure vessel is critical to plant safety.  A failure of the vessel is beyond the design basis.  Therefore, the design requirements for vessels have significant margins to prevent brittle or ductile failure under all anticipated operating conditions.  The early vessels […]

News & Views, Volume 50 | TRU Compliance Equipment Testing Project

EQUIPMENT TESTING AND CERTIFICATION TO ASSESS RISK By:  Katie Braman Using a risk-based approach derived from various seismic standards from the Institute of Electrical and Electronics Engineers, TRU and BC Hydro will develop a synthetic test motion in three axes, mount the equipment on a triaxial shake table at TRU’s testing partner’s facility, and test […]

News & Views, Volume 50 | Porting SI’s ANACAP Concrete Model into LS-DYNA

ADVANCED STRUCTURAL ANALYSIS By: Livia Mello and Shari Day One of Structural Integrity Associates’ (SI) strengths is combining state-of-the-art software with material science expertise to solve difficult structural and mechanical problems. A notable example in recent years is the Aircraft Impact Analysis (AIA) performed by SI for NuScale Power, using the ANACAP concrete material model. […]

News & Views, Volume 50 | Oil and Gas Pipeline Intel

PRCI June Technical Committee Meetings Structural Integrity Associates (SI) recently attended the PRCI June 2021 Technical Committee (TC) Meetings. SI is also planning to support the upcoming PRCI NDE workshop scheduled for October 2021 as well as future committee meetings. SI will continue to engage and support industry with PRCI.  As a researcher for PRCI, […]

Manufacturing Supply Chain Upsets

MATERIALS LABORATORY CASE STUDY 6 THE PROBLEM A supplier of electromagnetic interference (EMI) components noticed that one of their manufacturer’s components was not performing as well as similar components had previously.  The supplier had several theories on the make-up of the component and asked SI to investigate and confirm the material constituents as well as […]

Process Upsets – Condition Analysis

MATERIALS LABORATORY CASE STUDY 5 THE PROBLEM A filter was removed from a stator cooling system after pressure differential sensors indicated it may be blocked. The filter was submitted to SI’s Materials Laboratory for analysis to help identify the material blocking it. Figure 1. The filter shown in the as-received condition Figure 2. The yellow […]

Infrastructure Upgrades – Materials Analysis

MATERIALS LABORATORY CASE STUDY 4 THE PROBLEM Structural Integrity received a section of an original star member from one of Austin’s Moonlight Towers (Figure 1). The material was suspected to be a ductile or malleable cast iron and the company refurbishing the towers needed to determine a suitable replacement material. SI was asked to perform […]

Infrastructure Upgrades – Material Verification

MATERIALS LABORATORY CASE STUDY 3 THE PROBLEM Structural Integrity received several sections of core reinforcing steel from a client performing work at a local university gymnasium (Figure 1). SI’s client needs to have an understanding of the material tensile strength in order to obtain the appropriate replacement material. THE SOLUTION Cross-sections were removed from each […]

Manufacturing Supply Chain Upsets

MATERIALS LABORATORY CASE STUDY 2 THE PROBLEM A manufacturer noticed recent material provided by a supplier was not performing as well as what had been provided previously, and asked SI’s Materials Laboratory to investigate. THE SOLUTION Two pieces of stock material were submitted for analysis (Figure 1). The sample marked as F was the most […]