Accession Number : ADA258829


Title :   Open and Filled Hole Static Tensile Strength Characterization of Metal Matrix Composite SCS-9/Beta21s.


Descriptive Note : Master's thesis,


Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING


Personal Author(s) : Roush, Jacob T


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a258829.pdf


Report Date : Dec 1992


Pagination or Media Count : 165


Abstract : SCS-9/Beta 21s has a reduced gauge thickness, in comparison with other metal matrix composites, due to a smaller diameter fiber. This reduced gauge thickness makes it an attractive candidate for the skin of hypersonic vehicles. Tensile testing of (0/90) sub 2s and (O/+ or -45/90) sub s laminates was performed at room temperature, 482 deg C, and 650 deg C. Both notched and unnotched specimens were tested. Notched specimens, open and filled hole, had a width-to-diameter ratio of six. Materials 7075-T6 and Mar-m-246 were used as pins in the filled hole tensile testing. Analytical work was completed to predict material properties, elastic and plastic stress concentration factors, residual stresses, and failure strengths. Damage was documented in the form of fiber-matrix debonding, matrix cracking, fiber failure, and plasticity.


Descriptors :   *TENSILE STRENGTH , *METAL MATRIX COMPOSITES , *STATICS , *SILICON CARBIDES , STRESSES , METALS , DIAMETERS , RATIOS , MATERIALS , COMPARISON , FAILURE , HYPERSONIC VEHICLES , PINS , PLASTICS , VEHICLES , WIDTH , WORK , PLASTIC PROPERTIES , RESIDUALS , ROOM TEMPERATURE , NOTCH SENSITIVITY , STRESS CONCENTRATION , THESES , ELASTIC PROPERTIES , LAMINATES , DAMAGE , TEMPERATURE , THICKNESS , FIBERS


Subject Categories : Inorganic Chemistry
      Laminates and Composite Materials
      Mechanics
      Solid State Physics


Distribution Statement : APPROVED FOR PUBLIC RELEASE