Compression tests

Compression tests measure the mechanical resistance of a material or product to a compressive force applied along a defined axis. This analysis is essential for evaluating the stiffness, deformability, and breaking strength of materials used in industry. The data obtained (elastic modulus, maximum stress, elongation, residual strain) allow for the characterization of product performance, durability, and conformity.

Methods and equipment used

Compression tests are performed using a dynamometer or a texture analyzer , depending on the material and the force range being studied. The test involves applying an increasing load to the sample until it breaks or deforms to the desired degree. Measured parameters include:

• The maximum compressive stress ;
• The compression modulus (ratio between stress and strain);
• The elastic limit (threshold beyond which the deformation becomes permanent);
• The energy absorbed before rupture.

These tests can be carried out at or controlled temperature , according to the applicable standards (ASTM, ISO, NF EN). They apply to a wide range of materials: plastics, foams, rubbers, composites, pharmaceutical tablets, packaging or finished products.

For further mechanical analysis, see also:

• the tensile test to determine resistance to elongation,
• the bending test to characterize rigidity,
• or analysis (DMA) to study the viscoelastic behavior of materials.

Industrial applications

Compression tests have applications in many sectors:

• Packaging : evaluation of the crush resistance of boxes, bottles, films, caps or multilayer materials.
• Materials and polymers : measurement of the stiffness, density and mechanical resistance of plastics, composites and elastomers.
• Pharmaceutical industry : control of tablet cohesion and validation of the compression process.
• Building and construction : testing the performance of insulating foams, concretes and technical polymers.
• Food and cosmetics : measurement of the texture or hardness of finished products (tablets, capsules, sticks, soaps).

The data from these tests allows for the optimization of product formulation, design and compliance with industrial and regulatory standards .

Analytical interest and complementarity

Compression testing is often combined with other mechanical or thermal tests for a complete characterization of the material:

• Tensile test to compare behavior under opposite loads;
• DSC analysis to study thermal transitions and crystallinity;
• TGA analysis to assess thermal stability;
• Shore hardness measurement to complement mechanical properties;
• Powder rheology for tablet or granule applications.

This multidimensional approach makes it possible to obtain a complete profile of the material, ensuring an optimal choice during product development or validation.

YesWeLab Services

YesWeLab relies on a network of partner laboratories specializing in mechanical and rheological analyses , accredited to ISO 17025 and/or COFRAC . Depending on your needs, our experts select the protocol best suited to your product (ISO, ASTM, EN standards) and the desired test conditions (temperature, loading speed, controlled environment).

Thanks to the YesWeLab digital platform , you can centralize your analysis requests, track your samples, and access your reports online. Since 2020, numerous manufacturers in the packaging, polymer, and technical materials sectors have trusted us to manage their mechanical testing.

To obtain a quote or submit a specific project, contact our scientific team today.