Fracture Toughness Testing Services


Fracture mechanics testing can provide quantitative analytical results that aid in predicting crack initiation and crack growth rate.

Our experienced engineers can help with specimen design, fixture creation, and test parameter selection to best assist with fracture mechanic testing needs.

Click here to request a quote, or click on the button below for more information on IMR's fracture toughness testing capabilities.


Fracture Toughness Test - Materials Tested

  • Composites
  • Polymers
  • Metals & Non-Metals
  • Ferrous & Non-ferrous

Fracture Toughness Test - Purpose

Materials that are made, processed, and machined can inevitably introduce a flaw to a finished component.  Flaws can either be harmless or create a potentially unsafe component that becomes a liability.  Fracture mechanics specifically determine if the material or component is more susceptible to cracking.

Fracture toughness testing provides the following insight into the relationship between 

  • applied loading
  • environmental factors
  • presence of cracks and crack-like defects
  • physical properties of the material used in components

Fracture Toughness Test - ASTM Standards

IMR Test Labs offers accredited testing to:

  • ASTME E399 (K1c)
  • ASTM E1820 (J1c)

Fracture Toughness Test - Specimen Parameters

  • Compact Tension (CT) 
  • Middle Tension (MT)
  • Single-Edge Notched Tension (SENT)
  • Single-Edged Notched Bend (SENB or three-point bend)
  • Extended Compact Tension (ECT)
  • Centre Cracked Tension (CCT)
  • Surface Cracked Tension (SCT)
  • Composite Materials under modes l, ll, and lll loading

Fracture Toughness Test - Benefits

Determine Most Suitable Material 

With fracture toughness test results, manufacturers can make side-by-side comparisons of data in order to determine which material is best suited for their application.

Determine Longevity of Material 

Fracture toughness reveals which materials are able to last longer under stresses without cracking and whether those materials are able to contribute to the overall longevity of the mechanical component. 

Determine Safety of Material

Components that fail due to cracking are extremely hazardous and can cause extensive damage to both the overall machine or unit and those who are using it.  Determining which material is the safest through fracture toughness testing is of paramount importance. 

Cost Savings

Using the best-suited material for an application contributes to overall cost savings, as replacement materials, repairs, and downtime are no longer potential factors. 

Combined Testing Procedures

Fracture Toughness Testing can be used together with many other types of mechanical testing, in order to create an overall picture of a material.  Other tests include corrosion testing, fatigue testing, failure analysis, and more.  

Adhesion (Peel) Testing
Bend Testing
Bond Strength Testing 
Charpy Impact Testing  (-320°F  to 450°F) 
Climbing Drum Adhesion of Sandwich Composites
Coating Adhesion
Coating Shear Fatigue
Coefficient of Thermal Expansion by TMA
Composite Testing (Fiber Reinforced)
Compression Set
Compressive Properties
Core Shear Properties of Sandwich Construction by Beam Flexure
Creep and Stress Rupture Testing
DMA (Dynamic Mechanical Analyzer)
Elastic Modulus
Fatigue Testing
Filled Hole Tension & Compression
Flat-wise Tensile Testing
Flexural Properties
Floating Roller Peel Strength
Fracture Mechanics
Gel Time
Hardness (Rockwell, Brinell, Durometer, Shore, Barcol, Knoop, Vickers, Macro Vickers)
Heat Aging
Heat Deflection by TMA
Heat Treatment (furnace to 2100°F)
Hydrogen Embrittlement
Hydrostatic Pressure

Indentation Toughness
Interlaminar Shear
Jominy Hardenability
Lap Shear Testing
Machining & Specimen Preparation
Modulus of Rupture (MOR)
n-Value (Strain Hardening Exponent)
Open Hole Tension and Compression
Pipeline Integrity Testing
r-Value (Plastic Strain Ratio)
Residual Strength of Composites After Impact
Rotating Beam Fatigue 
Shear Testing of Rivets to ASTM B565, Single/Double
Short Beam Strength
Shot Peen Qualification
Single-Edged Notched beams (SENB)
Slow Strain Rate (G129)
Specimen Conditioning
Strain Gaging
Surface Roughness (ANSI/ASME B46.1)
T Peel Strength
Tear Resistance of Films & Sheeting
Tear - Rubbers & Elastomers
Tensile Testing
Torsional and Axial Fatigue (200 lb)
Tube Testing (Tensile, Flare, Hydrostatic)
Welder & Procedure Qualification
Wire/Spring Testing (Wrap, Coil, Bend)
Young's, Tangent and Chord Modulus (Room Temperature)

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