Fatigue Testing
The Forensics staff at ATS has access to our in-house Chemical laboratories. Often times an Investigator returns from a site inspection with components or evidence which requires additional testing or analysis to arrive at a conclusion. Our Chemistry Labs are equipped to assist the Forensic Investigators in Chemical Analysis of metals, plastics, liquids and gases.
Fatigue testing consists of applying a cyclic load to a test specimen to determine performance data during situations similar to real world working conditions. ATS’s experienced engineers can help design test programs and fabricate the required fixturing for all types of fatigue testing.
ATS has expanded our testing capabilities to include fatigue, fracture toughness, CTOD, and high temperature tensile testing with the addition of two new MTS Fatigue Testers. The versatile servo-hydraulic systems will allow us to perform numerous types of fatigue tests on many different sample sizes and orientations. Some of our wide range of testing parameters are listed below.
Machine Capabilities:
| Load Capacity: | 100kN – Dynamic Load |
| 120kN – Static Load | |
| Temperature Range: | Ambient – 1000°C |
CTOD Testing
Fracture Toughness determines the amount of stress required to propagate an existing flaw or defect in specific materials. Since traditional methods of destructive testing cannot always predict how a material will behave with a defect, fracture toughness is very important in the design stage.
Crack-Tip Opening Displacement (CTOD) is used as a type of fracture toughness testing to determine if a material is appropriate for strenuous working conditions. CTOD testing is the measure of plastic deformation prior to failure in a pre-cracked sample. This type of test is a variation of fatigue testing that has load rates more representative of in-service conditions.
ASTM Specification Capabilities:
- E466 – Fatigue Testing of Metallic Materials
- E399 – Linear-Elastic Plane-Strain Fracture Toughness (KIC) of Metallic Materials
- E1290 – Crack-Tip Opening Displacement (CTOD) Fracture Toughness Measurement
- E647 – Measurement of Fatigue Crack Growth Rates
- E561 – K-R Curve Determination
- E1820 – Measurement of Fracture Toughness (JIC-CTOD Measurement)
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