Dynamic Mechanical Analysis (DMA)

Dynamic Mechanical Analysis (DMA) characterizes the viscoelastic behavior of materials by applying small oscillatory forces while precisely controlling temperature, frequency, or time. By measuring the material’s response to dynamic loading, DMA provides detailed insight into mechanical performance across thermal and operational conditions.

At Materials Metric, DMA is used to determine storage modulus (E′) representing elastic behavior, loss modulus (E″) representing viscous behavior, damping factor (tan δ), glass transition temperature (Tg), and relaxation or creep behavior. DMA is one of the most sensitive techniques for assessing mechanical integrity, phase transitions, and performance stability in polymers, composites, biomaterials, and advanced engineering materials

Use of DMA

DMA is used to:
• Determine temperature-dependent stiffness and damping
• Measure Tg more sensitively than DSC
• Assess curing and crosslinking of polymers and adhesives
• Characterize time-, temperature-, or frequency-dependent behavior
• Predict performance under real-world dynamic loading
• Understand viscoelastic transitions in biomaterials and composites

Applications of DMA

Polymers & Composites: modulus, damping, Tg behavior
Adhesives & Coatings: curing, crosslinking, viscoelasticity
Biomaterials: mechanical behavior in hydrated environments
Medical Devices: fatigue, flexibility, and durability under thermal load
Packaging: stiffness and deformation under dynamic stress

Sample Analysis Process

1. Submission & Objective Review

Select test mode: tension, dual cantilever, bending, shear, or compression
Define test type: temperature sweep, frequency sweep, time sweep

2. Sample Preparation

Samples are tested in solid form, not dissolved
Cut to precise dimensions according to instrument geometry
Films, bars, or molded parts must meet strict dimensional tolerances
Hydrated materials may be tested in controlled humidity or submerged environment
No solvents are used for preparation

3. DMA Testing

Oscillatory loading applied during controlled temperature ramp
Frequency or time-domain testing performed as required
Real-time modulus and damping recorded

4. Data Processing & Reporting

E’, E’’, tan δ curves
Tg determination
Modulus transitions and relaxation events
Interpretation tied to mechanical performance, durability, and stability

Why Choose Materials Metric for Your DMA Analysis

Materials Metric provides advanced viscoelastic testing backed by deep expertise in materials science and biomedical engineering.
Our DMA services include:

Highly sensitive Tg and transition detection
Full viscoelastic profiling across temperature and frequency
Multi-mode testing for films, solids, hydrogels, foams, and composites
Curing and crosslink studies for adhesives and coatings
Clear, engineering-focused interpretation connecting data to performance, fatigue behavior, and product design

We provide DMA results that support R&D, quality control, regulatory submissions, and mechanical reliability decisions.

Related services

To learn more about our Dynamic Mechanical Analysis (DMA) or other testing needs, please contact us.

Frequently Asked Questions

What is dynamic mechanical analysis (DMA)?

DMA is a technique that applies an oscillating mechanical stress or strain to a sample while varying temperature, frequency, or time, and measures the resulting response. It characterizes the viscoelastic behavior of a material by separating its elastic and viscous contributions.

What properties does DMA measure?

DMA measures storage modulus, loss modulus, and the damping factor (tan delta), along with glass transition temperature and mechanical relaxations. It is used to assess stiffness, damping, and temperature- and frequency-dependent performance of polymers, composites, and elastomers.

What sample is required for DMA?

A small, regularly shaped specimen is needed, such as a rectangular bar, film strip, or molded coupon sized for the chosen clamp geometry (for example tension, bending, or shear). Materials Metric can advise on dimensions based on the material stiffness and test mode.

Which standards apply to DMA?

DMA is commonly performed in line with ISO 6721 and ASTM D4065, with methods such as ASTM D7028 or D5023 used for specific modes and materials. Materials Metric applies validated or fit-for-purpose methods aligned with ASTM/ISO where applicable to match your specimen and objective.