ASTM D7905 is the test method for the Mode II interlaminar fracture toughness of unidirectional composites. To match this to your program, talk with our team.
What ASTM D7905 Covers
It measures the Mode II fracture toughness (G_IIC), the energy to grow a delamination under in-plane shear, a key damage-tolerance property.
How the Test Is Run
An end-notched flexure specimen with a starter crack is loaded in bending so the crack grows under shear, and G_IIC is calculated from the load and crack length.
Why It Matters
Mode II toughness governs shear-driven delamination in composites; accurate load and crack measurement are required.
Reading the Designation
Cited as ASTM D7905 with its edition. Confirm the version and specimen or fixture requirements before finalizing setup. To configure a composite testing setup, request a quote.
Related Standards
EN 6034 is the aerospace Mode II method and ASTM D5528 covers Mode I toughness.
Request a Quote
Setting up Mode II fracture toughness testing to ASTM D7905? Request a quote and our team will help you build a system matched to your laminate layup and fixturing.
TensileMill CNC products for ASTM D7905
Our specimen-preparation systems and testing equipment compatible with ASTM D7905:
Electro Mechanical Universal Testing System 5 kN / 50 kN with Precision Load Cell
Electro-Mechanical UTM · 5 kN / 50 kN with Precision Load Cell
Composite Testing Grips and Fixtures for Tensile, Shear, and Delamination Evaluation
Grips and fixtures for tensile, shear and delamination of composites
Get ready for ASTM D7905 with TensileMill CNC
TensileMill CNC designs and builds the systems labs use for standards-based mechanical testing. Our range includes universal testing machines with composite grips and fixtures for tension, compression, and shear coupons. Share your material mix and throughput, and we will recommend a setup that fits ASTM D7905.