ASTM D6641 is the test method for the compressive properties of composites using a combined loading compression (CLC) fixture. To match this to your program, talk with our team.
What ASTM D6641 Covers
It determines compressive strength and stiffness by sharing load between end-loading and shear-loading, reducing end crushing and premature failure.
How the Test Is Run
A coupon is clamped in a CLC fixture and compressed at a controlled rate with back-to-back strain gauges to confirm no buckling, and the compressive properties are calculated.
Why It Matters
Combined loading gives reliable composite compression data; the CLC fixture and back-to-back strain measurement are essential.
Reading the Designation
Cited as ASTM D6641 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
ASTM D3410 uses shear loading and ISO 14126 is the ISO composite compression method.
Request a Quote
Setting up combined-loading compression testing to ASTM D6641? Request a quote and our team will help you build a system matched to your laminate layup and fixturing.
TensileMill CNC products for ASTM D6641
Our specimen-preparation systems and testing equipment compatible with ASTM D6641:
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
Set up ASTM D6641 testing with TensileMill CNC
From specimen preparation to the test itself, TensileMill CNC supports the full ASTM D6641 testing chain. Depending on your specimens, that can include universal testing machines with composite grips and fixtures for tension, compression, and shear coupons. Send us your specimen types and target standards, and we will help you spec the right system.