What Biaxial Testing Measures
Biaxial testing provides simultaneous loading along two perpendicular axes, making it the preferred method for evaluating the multi axial mechanical behaviour of soft tissues, biomaterials, and engineered constructs.
Measurement Examples
- Axial and transverse stiffness
- Nonlinear anisotropic behaviour
- Coupling between orthogonal load paths
- Strain fields under multi axial loading
- Planar stress strain relationships
- Viscoelastic and time dependent behaviour
- Failure properties of sheet like specimens
Because many biological tissues exhibit anisotropic structure and nonlinear mechanics, biaxial testing is essential for understanding physiologic function and for validating computational models (and provides a more complete view of tissue mechanics than uniaxial testing).
Biaxial Testing in Biomaterials Research
These applications utilize biaxial soft tissue testing for characterizing physiologic load sharing and directional stiffness. Planar biaxial testing is widely used in:
Common Sample Types for Biaxial Testing
- Pericardium and other cardiac tissues
- Heart valve leaflets
- Vascular tissues and synthetic graft materials
- Engineered cardiac patches
- Decellularized ECM sheets
- Elastomeric membranes
- Thin polymer films
- Hydrogel sheets
- Soft robotics materials with planar geometries
How a Biaxial Test Works
A planar biaxial testing system applies orthogonal loading using two perpendicular pairs of actuators. During testing, the system records force and displacement in each direction.
Force controlled and displacement controlled biaxial testing
Both axes can operate independently or in coupled control modes to apply physiologic strain patterns or controlled paths.
Biaxial stretch protocols
Standard protocols include equibiaxial stretch, strip biaxial tests, anisotropic loading paths and cyclic biaxial deformation.
Imaging and strain mapping
Digital image-based strain measurement provides full field strain analysis essential for soft tissue and membrane mechanics.
Hydrated and temperature-controlled testing
Many biaxial tests require physiologic media and temperature control to maintain tissue integrity and reproducibility.
Recommended CellScale Instrument for Biaxial Testing
CellScale has a dedicated system for biaxial testing that enables precise control of orthogonal loading paths in soft tissues, membranes, and planar biomaterials.
Relevant Research Applications
Biaxial testing supports research across several application areas:
Featured Publications Using Biaxial Testing
Related Testing Methods
Biaxial testing is often combined with imaging and time-dependent methods.
Ready to Perform Biaxial Testing?
CellScale provides precise biaxial testing systems for soft tissues, biomaterials, and engineered constructs.
