Composite Laminates Tensile Testing

A wide range of new materials are being used to decrease the weight of vehicles and reduce emissions. Of these new materials continuous carbon fiber polymer composites offer great potential for producing lightweight structures, however, there are many barriers to their widespread adoption. Currently, the cost and process times of composites parts are significantly higher than those of traditional metal parts and they require new recycling techniques. Progress is being made with the development of lower cost carbon fibers and thermoplastic matrix materials that offer faster manufacturing processes and facilitate recycling.

Determining the Static Properties of Composite Materials


The successful use of composite materials demands a thorough understanding of their mechanical properties throughout their operating temperature range. The anisotropic and heterogeneous nature of composite materials means that a range of different mechanical tests, many requiring special fixtures, are required for full characterisation. Maintaining accurate mechanical alignment and minimizing set-up times when switching between test types is a major challenge for laboratories testing composite materials.


An integrated testing system consisting of accurately aligned precision grips along with a comprehensive range of test fixtures that can be mounted onto the grips provides an effective and productive solution for composites laminates testing. An optional temperature chamber provides the ability to test over a wide temperature range. In addition, the Composites Application Module for Bluehill® Universal software provides a range of, easy-to-use test methods for international standards (e.g. ASTM, EN, and ISO).

High Productivity with Consistent Results

The Challenge

Maintaining high test productivity along with consistent tensile test results is a challenge. High test productivity, particularly when testing at temperatures, demands that the operator spends as little time as possible loading specimens. Achieving the accurate specimen alignment needed to produce consistent results is difficult given these time constraints.

Traditionally, strain measurements on composite materials have been made using bonded strain gauges but the bonding of strain gauges is a costly and time-consuming process that requires a high degree of skill and experience. Thus, the strain gauging process reduces overall productivity and increases test costs.

Our Solution


Precise specimen alignment requires an accurately aligned testing set-up and repeatable grips incorporating a reliable means of specimen location.

Both manual and automatic (hydraulic) gripping solutions capable of providing quick specimen loading and accurate alignment are available. These grips can be used in an environmental chamber to test over a range of temperatures.

Extensometers are available for the testing of composite laminate coupons and, in most cases, they can be used to replace strain gauges.  Averaging Axial and Biaxial types provide both average axial and transverse strain measurements (for the determination of Poisson’s ratio).

In cases where bonded strain gauges must be used strain gauge adapters can be used to connect strain gauges directly to the test machine. In addition to contacting solutions, the Advanced Video Extensometer (AVE2) non-contacting video extensometer offers completely automatic operation requiring minimal action from the operator.

Contact Us to learn more about our automotive solutions

Related Content
Solución de prueba ASTM D3039

Solución de prueba ASTM D3039

ASTM D3039 es un estándar de prueba ampliamente utilizado para determinar las propiedades de tracción de los materiales compuestos. Debido a sus propiedades ligeras y a su alta resistencia a la tracción, los materiales compuestos son cada vez más favorecidos por las industrias aeroespacial y automotriz, y se utilizan para reemplazar metales en muchas aplicaciones.

Solución de pruebas ISO 527‑4

Solución de pruebas ISO 527‑4

La norma ISO 527‑4 cubre las condiciones de prueba de compuestos isotrópicos y ortotrópicos no unidireccionales y hace referencia a la norma ISO 527‑1. Esta guía está diseñada para presentarle los elementos básicos de una prueba de tracción de plástico ISO 527‑4, incluida una descripción general del equipo, el software y las muestras necesarias.