Design and Testing
Numerical tool with mean stress correction demonstrated for fatigue life estimation of thermoplastic composites
To aid design of fatigue-resistant structures, Econ Engineering has developed an algorithm to evaluate ply-based cyclic stiffness degradation combined with an FE failure check, validated for a CF/PAEK pressure vessel.
Read More
Interlaminar tensile testing of composites: An update
New test method developments for measuring interlaminar tensile strength address difficulties associated with the ASTM D6415 curved beam flexure and ASTM D7291 flatwise tensile tests.
Read More
Composite test methods (and specifications) for fiber-reinforced concrete structures
While initially focused on transitioning existing standards published by the American Concrete Institute, the relatively new ASTM Subcommittee D30.10 is developing new standardized test methods and material specifications for FRP composites.
Read More
Notched testing of sandwich composites: The sandwich open-hole flexure test
A second new test method has been standardized by ASTM for determining notch sensitivity of sandwich composites.
Read More
Measuring ply-wise deformation during consolidation using embedded sensors
Strip-type shape sensor method claims real-time measurement of ply-wise deformation.
Read More
Notched testing of sandwich composites: The sandwich open-hole compression test
A new ASTM-standardized open-hole compression test method seeks to determine the notch sensitivity of sandwich composites.
Read More
Material equivalence testing in shared composites databases
In response to traditionally proprietary polymer matrix composites (PMC) qualifications, NCAMP continues its efforts to make material property databases publicly available.
Read More
Glass-coated magnetic microwires for nondestructive composites monitoring
Glass-coated, amorphous microwires combine nanometer to micrometer diameters, enabling embedding into composites without degrading mechanical properties.
Read More
Composite prepreg tack testing
A recently standardized prepreg tack test method has been developed for use in material selection, quality control and adjusting cure process parameters for automated layup processes.
Read More
Improving analyses of composite pressure vessels
Accurate geometry modeling and equivalent material property approximations captured by WoundSim will play a role in improving COPV analyses.
Read More