Analysis of deformation under shear

Objective of the analysis

Analysis of shear deformation allows us to characterize the mechanical behavior of a material or product subjected to tangential stress. This stress induces a deformation (or shear rate) whose intensity and rate of response reveal the internal structure of the product, its strength, plasticity, or fluidity.

This analysis is essential for:

• Understanding the mechanical behavior of gels, pastes, complex fluids, or polymers
• Optimize the texture or consistency of a product
• Identify a yield stress threshold
• To study the mechanical stability, resilience, or fragility of a structure
• Adapt the transformation processes (mixing, pumping, extrusion)

Methodology

The sample is placed in a rheometer or mechanical tester which applies a shear stress (rate or stress control). The resulting deformation (or rate of deformation) is measured to construct a stress vs. strain or viscosity vs. shear .

The analysis can be carried out by:

• Static or oscillatory mode (dynamic rheology)
• Variable temperature (thermo-rheological study)
• Suitable geometries: cone-plane, parallel plates, concentric cell

Affected matrices

• Cosmetic products: creams, gels, balms, masks
• Foods: yogurts, sauces, purees, fermented products
• Pharmaceuticals: ointments, syrups, topical gels
• Molten or dispersed polymers: resins, glues, waxes
• Flexible materials or organogels: technical pastes, coatings, slurries

Industrial applications

• Development of functional textures (ease of application, spreading, shape retention)
• Validation of rheological stability over time
• Quality control: inter-batch reproducibility
• Definition of manufacturing parameters: pumping speed, extrusion force
• Predictive studies: behavior under mechanical stress

Why go through YesWeLab?

YesWeLab connects you with expert laboratories in rheology and materials mechanics. Our partners are equipped with high-performance rheometers, compliant with ISO and ASTM standards, enabling precise analyses, even for sensitive or non-homogeneous products.

Our platform allows you to define precise shear ranges, integrate environmental constraints (temperature, humidity), and track your entire project via a secure client area.

Further analyses recommended :

• Flow curve analysis
• Viscosity analysis
• Consistency analysis