TCR Engineering latest capabilities include fatigue, fracture toughness, CTOD, and high temperature tensile testing with the addition of two new Fatigue System Universal Testing Machine in capacity of 50KN and 250KN. The versatile servo-hydraulic systems will allow the mechanical testing lab of TCR in Mumbai to perform numerous types of fatigue tests on many different sample sizes and orientations in temperature range from ambient to 1000 °C. TCR has the capability of applying linear displacements utilizing linear actuators. Comparison fatigue testing of OEM and alternate source parts can also be performed to demonstrate equivalency of fatigue life.
Fatigue testing can be thought of as simply applying cyclic loading to a test specimen to understand how it will perform under similar conditions in actual use. The load application can either be a repeated application of a fixed load or simulation of in-service loads. The load application may be repeated millions of times and up to several hundred times per second.
CTOD Testing at TCR Engineering Lab in Mumbai
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 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.
Some of our wide range of testing applications done at the TCR Engineering Fatigue Test Lab in Mumbai are:
- Fatigue crack propagation [da/dN vs ΔK Studies]
- Fracture mechanics [K1c, J1c, CTOD] Testing
- 3 – point bend testing of materials
- Spring Fatigue Testing
- Room temperature and high temperature tests [up to 1000 °C]
- Low Cycle Fatigue [LCF]
- High Cycle Fatigue [HCF]
- High temperature tensile tests [up to 1000 °C]
- High strain rate testing [300mm/sec on 50KN and 100mm/sec on 250KN UTM]
- Slow strain rate testing [10-7 mm/sec on 100kN UTM]
TCR undertake the following ASTM/BS/ISO Specification Capabilities:
ASTM E8 / E8M Tension Testing of Metallic Materials
ASTM E21 Elevated Temperature Tension Tests of Metallic Materials
ASTM E399 Linear-Elastic Plane-Strain Fracture Toughness (KIC) of Metallic Materials
ASTM E1290 Crack-Tip Opening Displacement (CTOD) Fracture Toughness Measurement
ASTM E1820 Measurement of Fracture Toughness (JIC-CTOD Measurement)
ASTM E466 Force Controlled Constant Amplitude Axial Fatigue Tests of Metallic Materials
ASTM E606 Strain-Controlled Fatigue Testing
ASTM E647 Measurement of Fatigue Crack Growth Rates
ASTM E9 Room Temperature Compression Testing of Metallic Materials
ASTM E 2714 Creep Fatigue Testing
BS 7448 Fracture mechanics toughness tests. Method for determination of KIc, critical CTOD and critical J values of welds in metallic materials
ISO 12135 Metallic materials -- Unified method of test for the determination of quasistatic fracture toughness
Download Fatigue Testing Services Brochure
Download the Fatigue Testing and CTOD Brochure