Onsite Laminate Analysis Course for U.S. Navy Held at North Island Naval Air Station

February 11th, 2020 by

In late January of 2020, Abaris Training’s senior engineering instructor, Greg Kress, provided the Composite Laminate Analysis (ES-2) course for the US Navy’s Fleet Readiness Center (FRCSW) engineers at NAS North Island, San Diego, CA.

The students received a rigorous 5-day course that involved classroom lecture, computer exercises, shop exercises, and mechanical testing.  The ES-2 course focused on detailed analytical methods using Classical Laminate Plate Theory (CLPT) and composite failure criteria.  According to Kress “this course delved into laminate analysis at a much higher level than any typical university composites course.”  The course also introduced the students to Finite Element Analysis (FEA) of composite materials and laminates.

Shop exercises involved fabricating and mechanically testing both lamina and laminate coupons, which were also analyzed with FEA.  With the Navy possessing an excellent composites lab, clean room, along with mechanical testing capabilities, the course was easy to facilitate.  However, Abaris also has the capabilities to provide engineering training in much more austere environments if required.

More on Abaris Engineering Courses

Abaris engineering courses have undergone significant enhancements during the past two years, preparing students in 2020 and beyond for some exciting new training.  Most importantly is the new curriculum structure where the courses have now been broken down into two curricula, Engineering Structures (ES) and Engineering Repair (ER), with a defined flow and order of prerequisites.

The ES curriculum, composed of progressive training courses (designated as ES-1, ES-2, ES-3, and ES-4) are intended to take engineers from a background with no composite experience to an extremely high level of understanding of requirements for designing and manufacturing composite structures.  The ER curriculum is limited to two courses, ER-1 and ER-2, to instruct engineers on the requirements for performing composite repair through a thorough understanding of the analysis methods for substantiating a composite repair.

All engineering courses include hands-on fabrication that results in test coupons of varying levels of complexity that are mechanically tested throughout the week to validate the analysis.  In addition, all advanced engineering courses now incorporate Finite Element Analysis (FEA).  ES-2 introduces FEA with modeling at the lamina and laminate level.  ES-3 and ES-4 perform more advanced FEA modeling as the complexity of the courses increase.  ER-1 is Abaris’ most popular engineering course, providing a thorough baseline understanding of composite repairs and repair analysis.  ER-2 is Abaris’ newest engineering course, which performs analysis of holes and cracks in composites and bonded and bolted joint analysis in addition to analyzing the full effects of composite repair on the surrounding structure with FEA.

Most recently, the (ES-3, ES-4, and ER-2) courses have implemented Digital Image Correlation (DIC), which is a cutting-edge optical measurement of the full strain field.  Throughout these courses, hand calculations are used to evaluate the unique structural aspects, FEA modeling is completed to verify the analysis, and DIC is performed to validate both the hand calculation and the FEA.  The results provide a spectacular insight into the design requirement for both composite structures and repairs.

For more information on hosting an engineering course at your facility, contact us at training@abaris.com.  If you have specific questions for the instructor, please contact Greg Kress at greg.kress@topflightaero.com.