Accession Number : ADA259203


Title :   Compression-After-Impact Behavior of ARALL(trade name)-1 Laminates


Descriptive Note : Final rept. Jun-Nov 87,


Corporate Author : WRIGHT LAB WRIGHT-PATTERSON AFB OH


Personal Author(s) : Hoogsteden, William P


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a259203.pdf


Report Date : 14 Jul 1992


Pagination or Media Count : 53


Abstract : ARALL(R) laminates are the first generation of a new class of materials combining the best properties of metals and composite materials. This report represents part of a Phase I of a two phase study of ARALL(R) -I laminates. Ten specimens were tested in a modified Boeing Compression-After- Impact fixture. Two specimens were undamaged. The remaining eight received impacts of 2.3 ft-lbs (3.18J), 5.5 ft-lbs (7.5J), 10.4 ft-lbs (14. lJ), and 11.7 ft-lbs (15.9J). Only dents were produced at 2.3 ft-lbs (3.18J). Back face cracks appeared at 5.5 ft-lbs (7.5J). Full penetration was achieved at 10.4 ft-lbs (14. lJ). Interior damage as measured by ultrasonic 'C' scan showed little damage beyond that already visible on the Surface. Compressive buckling was the mode of failure. Increasing impact energy decreased the buckling load of the specimens. 'C' scans taken after compression testing revealed no growth of the interior damage.


Descriptors :   *COMPRESSION , *IMPACT , *LAMINATES , *COMPOSITE MATERIALS , METALS , FAILURE , PHASE , PENETRATION , ALUMINUM , FATIGUE , BUCKLING , ULTRASONICS , SURFACES , PHASE STUDIES , ENERGY , DAMAGE , CRACKS , MATERIALS


Subject Categories : Inorganic Chemistry
      Laminates and Composite Materials
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE