Design and Testing
Crashworthiness testing of composites: A building block approach, Part 1
Determining the crashworthiness of composite structures requires several levels of testing and analysis, starting with coupon-level crush testing.
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Testing to support composite bolted joint analysis
An overview of ASTM Standard Guide D8509, and its coupon-level mechanical testing of design properties for analyzing composite bolted joints.
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Photothermal tomography for locating, quantifying defects in composites
Years of infrared testing development result in thermography technology that is no longer just qualitative, but can define defect size and depth, making additional UT scans obsolete.
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Damage tolerance testing of sandwich composites: The sandwich flexure-after-impact (FAI) test
A second new ASTM-standardized test method assesses the damage tolerance of sandwich composites under flexural loading.
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Multi-scale 3D CT imaging enables digital twinning, high-fidelity simulation of composite structures
Computed tomography (CT) provides highly accurate 3D analysis of internal microstructure, performance simulation of carbon fiber/PEEK satellite strut.
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Damage tolerance testing of sandwich composites: The sandwich CAI test
A new ASTM-standardized test method established in 2022 assesses the compression-loaded damage tolerance of sandwich composites.
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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.
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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.
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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.
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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.
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