Mechanical Testing of Composite Materials
Inserts interfaced with Carbon Fiber Tube
Things to test
Mechanical Tests
Tensile Test- needed for plug
How to test it
Probably not needed since the push rod will be under constant compression
Flexural Test
three-point and four-point bend testing according to ISO 14,125, ISO 178, ASTM D 790, and ASTM D 6272
parameters for this test are the support span, the speed of the loading, and the maximum deflection for the test
Impact Test
Compression Test
End loading
Sheer loading
ASTM D 695, ASTM D 3410, and ISO 14,126.
information on elastic limit, proportional limit, yield point, yield strength, and compressive strength
Strength at high temperatures (Summer)
Fatigue Failure?
Plug Testing
Adhesive
Loctite
EA E-40HT
DP420
DP460
Tube and metal prep
Aluminum stock for insert
Check for appropriate lengths
Gap 0.004 - 0.012 in
Carved aluminum, tapped for fitting a bearing insert
create shoulder only for grabbing in tensile test
ASTM D 695 (compression test)
What is being recorded: Used to find the modulus of elasticity, yield stress, deformation beyond the yield point, and compressive strength
Procedure: ASTM D695 Rigid Plastic Compression Testing
Machinery Used: Can be performed on either a single-column or dual-column universal testing machine such as those available in Instron's 3400 and 6800 Series (ASTM D695 Compression Testing Rigid Plastics)
ASTM D 3410
What is being recorded: Used to measure the ultimate compressive strain, the compressive modulus of elasticity, Poisson’s ratio, and transition strain.
Machine used: Standard Universal Testing Machine
Procedure: ASTM D3410 Polymer Matrix Composite Shear Load Testing - ADMET (testing procedure tab)
ISO 14,126.
What is being recorded: the compressive strength and compressive modulus of fiber-reinforced plastic composites in the in-plane direction, meaning the direction parallel to the plane of the laminate
Machinery Used: ISO 14126 | ASTM D3410: Shear Loading Compression
Procedure: In-Plane Compressive Properties of Fiber-Reinforced Plastic Composites
Inner Diameter of the Push rod - 0.437"
Inserts: has to be slightly smaller than the inner diameter
Where to buy:
McMaster - Carr (Current)
MSC Industries - MSC Industrial Supply Co. (mscdirect.com)