ASTM D4255 B TESTING FIXTURE

IN-PLANE SHEAR PROPERTIES OF POLYMER MATRIX COMPOSITE MATERIALS BY THE RAIL SHEAR METHOD

ASTM D4255-B Testing Fixture
ASTM D4255-B Testing Fixture

This test method indicates the cutting properties in the plane of a high modulus fiber-reinforced composite materials by two procedures. As regards the procedure A, laminates stuck between two pairs of loading rails are tested. When the tension load is applied to the rails, shear forces arise in the specimen. In procedure B, laminates clamped on opposite edges with a tensile or compressive load applied to a third pair of rails in the center are tested. The application of this method is for continuous-fiber or discontinuous-fiber-reinforced polymer matrix composites in the following material forms:

  • Laminates wich are composed only of woven fabric filamentary laminae with the warp direction oriented parallel or perpendicular to the mounting rails.
  • Laminates wich are composed only of unidirectional fibrous laminae, with the fiber direction oriented parallel or perpendicular to the mounting rails.
  • Laminates of balanced and symmetric construction, with the 0° direction oriented parallel or perpendicular to the mounting rails.
  • Short-fiber-reinforced composites with a majority of the fibers being randomly distributed
ASTM D 4255-B Testing Fixture - Drawing
ASTM D 4255-B Testing Fixture – Drawing

 

 

Test Standard

ASTM D 4255A /  no ISO equivalent
Maximum Load75 kN
Temperature Rangefrom -80 °C to 149 °C
Specimen Thickness1.3-3.2 mm
Specimen Width74-76 mm
Specimen Length141-159 mm
Mass11.30 kg
ASTM D 4255-B Testing Fixture - Assembly
ASTM D 4255-B Testing Fixture – Assembly

 

Referenced Documents

ASTM Standards

  • D2584 Test Method for Ignition Loss of Cured Reinforced Resins
  • D3171 Test Methods for Constituent Content of Composite Materials
  • D3518/D3518M Test Method for In-Plane Shear Response of Polymer Matrix Composite Materials by Tensile Test of a 45 Laminate
  • D3878 Terminology for Composite Materials
  • D5229/D5229M Test Method for Moisture Absorption Properties and Equilibrium Conditioning of Polymer Matrix Composite Materials
  • D5379/D5379M Test Method for Shear Properties of Composite Materials by the V-Notched Beam Method
  • D5448/D5448M Test Method for Inplane Shear Properties of Hoop Wound Polymer Matrix Composite Cylinders
  • E4 Practices for Force Verification of Testing Machines
  • E6 Terminology Relating to Methods of Mechanical Testing
  • E111 Test Method for Youngs Modulus, Tangent Modulus, and Chord Modulus
  • E122 Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process
  • E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
  • E251 Test Methods for Performance Characteristics of Metallic Bonded Resistance Strain Gages
  • E456 Terminology Relating to Quality and Statistics
  • E1237 Guide for Installing Bonded Resistance Strain Gages
  • E1309 Guide for Identification of Fiber-Reinforced Polymer-Matrix Composite Materials in Databases
  • E1434 Guide for Recording Mechanical Test Data of Fiber-Reinforced Composite Materials in Databases
  • E1471 Guide for Identification of Fibers, Fillers, and Core Materials in Computerized Material Property Databases