ASTM D7905

Standard Test Method for Determination of the Mode II Interlaminar Fracture Toughness of Unidirectional Fiber-Reinforced Polymer Matrix Composites

ASTM D7136

Standard Test Method for Measuring the Damage Resistance of a Fiber-Reinforced Polymer Matrix Composite to a Drop-Weight Impact Event

ASTM D7028

Standard Test Method for Glass Transition Temperature (DMA Tg) of Polymer Matrix Composites by Dynamic Mechanical Analysis (DMA)

ASTM D5766

Standard Test Method for Open-Hold Tensile Strength of Polymer Matrix Composite Laminates

ASTM D5528

Standard Test Method for Mode I Interlaminar Fracture Toughness of Unidirectional Fiber-Reinforced Polymer Matrix Composites

ASTM D5467

Standard Test Method for Compressive Properties of Unidirectional Polymer Matrix Composite Materials Using a Sandwich Beam

ASTM D3165

Stress and Failure Analyses of Adhesive-Bonded Composite Joints using ASTM D3165 Specimens

BSS-7273

 Interlaminar Fracture Toughness by Double Cantilever Beam Method

Scope:
This method determines the interlaminar fracture toughness of a material by applying a constant tensile force to a bond to induce a crack.  The surfaces are pulled apart without sliding or shearing.

Procedure:
After appropriately conditioning and machining the specimens, a specimen is placed into the fixture and the machine begins to separate the specimen by pulling apart at the crack opening to a pre-specified distance.  The machine then returns to the zero extension point so that a calculation can be performed for the area within the curve produced.

Data:
Interlaminar toughness

Equipment Used:
Test frame, double cantilever beam test fixture

ASTM D7264

ASTM D7264 Standard Test Method for Flexural Properties of Polymer Matrix Composite Materials

Scope:
This test is designed for testing of flexural properties of polymer matrix composites by using a coupon of a rectangular cross section supported by two parallel beams set to a specific support span and deflected at a constant rate from the center of the span.

Procedure:
This test contains two procedures.  Procedure A involves a three point loading system, while procedure B utilizes a four point loading system.  Each procedure requires different calculations for strain due to the different deflections per each system.

Data:
Flexural strength, maximum flexural stress, maximum strain, modulus of elasticity, failure mode, location of failure

Equipment Used:
Test frame, four point flexural fixture, three point flexural fixture

ASTM D6641

ASTM D6641 Standard Test Method for Compressive Properties of Polymer Matrix Composite Materials Using a Comined Loading Compression (CLC) Test Fixture

Scope:
This method is performed by applying combined end-loading and shear-loading using a combined loading compression fixture. This standard is designed to analyze the compression properties of polymer matrix composite laminates employing either multidirectional or unidirectional fibers or other comparable materials.

Procedure:
The specimen is placed inside the test fixture and bolts tightened to a specific torque.  It is then placed within between two platens in the testing machine and a strain measuring device may be attached. The specimen is then compressed to failure.

Data:
Laminate compressive strength, laminate compressive modulus, compressive Poisson’s ratio by chord method

Equipment Used:
Test frame, CLC test fixture, compressometer or strain gauges