ISO 14129 — In-plane shear properties of fibre-reinforced plastic composites (±45° tension method)

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ISO 14129 is the test method for the in-plane shear stress/shear strain response of fibre-reinforced composites using a +/-45 tension test. To match this to your program, talk with our team.

What ISO 14129 Covers

It obtains the in-plane shear modulus and strength of a composite by pulling a +/-45 laminate in tension, the ISO route to shear properties.

How the Test Is Run

A +/-45 tabbed coupon is pulled in tension with axial and transverse strain measured, and the shear response is derived from the strains and the applied load.

Why It Matters

In-plane shear data is essential for composite design; two-direction strain measurement is required to derive the response.

Reading the Designation

Cited as ISO 14129 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 D3518 is the ASTM +/-45 shear method and ASTM D5379 uses a V-notch fixture.

Request a Quote

Setting up composite in-plane shear testing to ISO 14129? Request a quote and our team will help you build a system matched to your laminate layup and strain measurement.


TensileMill CNC products for ISO 14129

Our specimen-preparation systems and testing equipment compatible with ISO 14129:


Build your ISO 14129 workflow with TensileMill CNC

TensileMill CNC helps labs run ISO 14129 with repeatable, audit-ready results. That typically means universal testing machines with composite grips and fixtures for tension, compression, and shear coupons. Request a quote and our team will help you configure a system for ISO 14129.