LSP Technologies’ David Sokol explains non-destructive LBI process
David Sokol, Director of Research
In a recent webinar, LSP Technologies Director of Research David Sokol explains how the company’s non-destructive Laser Bond Inspection (LBI) technology can detect faulty bonds, including kissing bonds where the materials are in contact with each other but have no structural integrity.
Adhesive seals for composite materials pose a subtle challenge for quality control and safety, and that is how to detect problematic adhesive bonding without damaging materials or the adhesive bond itself.
A key step in the LBI process is to gradually increase the fluence, or power density, measured as Joules per square centimeter, for laser beams used to measure the integrity of composite adhesive bonds.
LBI readings show shock wave shapes that either reveal integrity in composite adhesive bonds or indicate clear failure in the bonds. The LBI process, at controlled levels, do not damage materials or compromise the integrity of healthily bonded composites.
Laser Peening and Laser Bond Inspection products showcase at Nashville’s Music City Exhibit Hall Dec. 3-6
LSP Technologies, Inc. (LSPT), the premier provider of laser peening equipment and services, as well as Laser Bond Inspection for composite materials, will offer product information and an introduction to laser technologies at the Defense Manufacturing Conference (DMC) Dec. 3-6 in Nashville, Tennessee.
Doug Eberhart, Director of Sales, will provide information on laser peening equipment, including the Procudo® Laser Peening System, the only commercial-grade system of its kind available for product line installation, and Laser Peening Services provided at LSPT’s Dublin, Ohio headquarters.
With the recent sale of a Laser Bond Inspection (LBI) system to Northrop Grumman Corporation (NGC), LSP Technologies has achieved another milestone in the commercial integration of LBI technology. Northrop Grumman’s implementation of LSPT’s proprietary LBI system marks another major airframe manufacturer to pursue implementing Laser Bond Inspection in their production process, further supporting Laser Bond Inspection as a reliable method for validating adhesively bonded structures.
LSP Technologies’ Laser Bond Inspection System
As the aviation industry increasingly works to make aircraft lighter, safer, and more fuel-efficient, aeronautical engineers are incorporating more composite elements such as carbon fiber into their vehicle designs. Composite airframe structures have the advantages of being lighter and more resistant to fatigue or corrosion damage than their metal counterparts. Composite panels are joined together using adhesive bonding agents, rather than traditional rivets or fasteners, which necessitates a new inspection process to interrogate the strength and safety of the composite bonds.
CompositesWorld: In January, David Lahrman, Vice President Business Development, highlighted Laser Bond Inspection at SME AeroDef in Long Beach, California. Sara Black of CompositesWorld blogged about her experience at SME AeroDef including meeting our very own David Lahrman to discuss the evolving technology of LBI. You can read the blog post here as it discusses the uses and technologies facing composites today.
She writes, “Still, if LBI could be combined with manufacturing and process controls for adhesive bonding such as those developed for the TRUST project…, we might get closer to bonded primary aerospace structure, without redundant fasteners.”
For more information about Laser Bond Inspection, click here.
LSP Technolgies is pioneering the field of using high energy lasers to non-destructively inspect adhesive bonds in composite and other bonded materials for weak or “kissing” bonds. The use of controlled, localized stress waves in materials and bonded joints offers new opportunities for the characterization of structures. Bonded joints in particular benefit from this application because there is no nondestructive inspection method to measure bond strength. LSP Technologies’ Laser Bond Inspection uses a high peak power short pulse laser to perform a localized proof test of a bond. The method can be nondestructively applied to strong bonds but will fail a weak bond, creating an internal disbond that is detectable by the laser bond inspection system itself or by post test ultrasonic inspection. To date numerous tests have shown the method to be sensitive to weak bonds in carbon fiber reinforced polymer composites structure bonds created by poor adhesive mixing, improper surface preparation or contamination. To Learn More click on the link. Flashhttp://mediazone.brighttalk.com/comm/ReedElsevier/33bdd84a70-22762-2251-24177Windows Mediahttp://mediazone.brighttalk.com/comm/ReedElsevier/b3a9cda1c2-22762-2250-24176