Fracture testing is a test in fracture mechanics to determine the fracture characteristics of materials and structures. Fracture characteristics refer to the characteristics related to crack initiation, propagation, crack arrest and instability in materials or structures, such as brittle transition temperature, crack propagation speed and fracture toughness. The application of fracture mechanics in engineering has been quite common. In order to analyze the fracture of engineering structures, the fracture characteristic data of materials or structures must be obtained through experiments. As a professional reliability third-party testing organization, T, C&A Lab can perform fracture tests on metals, ceramics, rubber and plastic products, textiles and other materials according to ISO, ASTM and other standards.
T, C&A Lab's fracture test methods include:
Three-point bending test
This is the most widely used in fracture toughness testing. It is named because the specimen is loaded by three-point bending in the test (Figure 1). It is used to measure the stress intensity factor KI, crack opening displacement δ and J integral.
Compact tensile test
Compared with other tests with the same testing ability, this kind of test has the smallest volume (compact size). Compact tensile test (Figure 2) has been widely used in the testing of fracture toughness and crack growth rate, especially in the evaluation and research of nuclear pressure vessel materials.
Drop weight test
The drop weight test (Figure 3) is a dynamic fracture test, which is a special simply supported beam test. On the tensile surface of the sample, a longitudinal brittle weld bead is surfacing welded, and a transverse cut is sawed on the weld bead. During the test, the sample is cooled to a certain temperature, the hammer head is allowed to fall freely, an impact is made on the sample, and the highest temperature at which the notch on the brittle weld bead of the sample cracks to the edge is measured.
Wide plate test
The wide plate test is a large-scale laboratory test. In many cases, it can simulate the fracture of the actual welded structure. The most commonly used notched welded wide plate specimens are shown in Figure 4. The pre-made cuts on both sides of the longitudinal weld of the specimen are used to simulate cracks. During the test, a tensile load is applied to the test plate at the required temperature, and the load and strain when the notch reaches cracking are measured.
Standards we test to
|ASTM E399||Method for Linear-Elastic Plane-Strain Fracture Toughness of Metallic Materials|
|ASTM E1820||Standard Test Method for Measurement of Fracture Toughness|
|ASTM E1921||Method for Determination of Reference Temperature, To, for Ferritic Steels in the Transition Range|
|ASTM E2899||Method for Measurement of Initiation Toughness in Surface Cracks Under Tension and Bending|
|ISO 12135||Metallic Materials — Unified Method of Test for the Determination of Quasistatic Fracture Toughness|
In addition, the experts in our Fracture Testing Laboratory also provide a variety of custom tests as you need. Let's discuss the customized service with our experts for free.
Instruments and data
- Urkovi, L.; et al. Flexural Strength of Alumina Ceramics: Weibull Analysis[J]. Transactions of Famena, 2010, 34(1):13-19.
- Md Jamil, M. S.; et al. Solid-state self-healing systems: The diffusion of healing agent for healing recovery[J]. Sains Malaysiana, 2015, 44(6):843-852.
- Bhaduri A. Impact Loading. In: Mechanical Properties and Working of Metals and Alloys. Springer Series in Materials Science, 2018, vol 264.
- Best, J. P.; et al. Small-scale fracture toughness of ceramic thin films: the effects of specimen geometry, ion beam notching and high temperature on chromium nitride toughness evaluation[J]. Philosophical Magazine, 2016:3552-3569.
- Dugan, J.; et al. Fracture Toughness Determination with the Use of Miniaturized Specimens. Contact and Fracture Mechanics. 2018.
T,C&A Lab's services include, but are not limited to
Note: the service is for research use only and not intended for any clinical use.
- Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES)
- X-Ray Fluorescence (XRF) Testing
- X-Ray Photoelectron Spectroscopy (XPS) Testing
- Infrared Spectroscopy Testing
- Ultraviolet Spectrum (UV) Testing
- Mass Spectrometry Testing
- Micro-Raman Spectroscopy Testing
- Nuclear Magnetic Resonance Spectroscopy Testing
- Elemental Analysis
- Structure Identification
- Flame Resistance Testing
- Electrical Properties Testing
- Optical Properties Testing
- Testing of Magnetic Materials
- Morphology & Size
- Material Properties
- Corrosion Inhibitor Testing
- Crevice Corrosion Testing
- Electrochemical Corrosion Testing
- Galvanic Corrosion Testing
- High Pressure High Temperature (HPHT) Corrosion Testing
- Hydrogen Embrittlement Testing
- Intergranular Corrosion (IGC) Testing
- Pitting Corrosion Testing
- Salt Spray Testing
- Sour Service Corrosion Testing
- Stress Corrosion Cracking (SCC) Testing
- Sulfide Stress Cracking (SSC) Testing
- Thermal Analysis
- Mechanical Testing
- Composite Testing
- Non-Destructive Testing
- Material Characterization
- Performance Testing
- Polymer Material Analysis
- Pharmaceutical Testing
- Chemical Analysis
- Case Depth Testing and Analysis
- Grain Size Analysis
- Particle Size Distribution Analysis and Testing
- Coating Thickness Testing
- Inclusion Rating
- Ferrite Testing
- Porosity Testing
- Grain Flow Testing and Analysis
- Weld Testing
- X-Ray Diffraction (XRD) Analysis
- Scanning Electron Microscopy (SEM) Laboratory
- Restricted Substances Testing
- Reverse Engineering Service
- Industrial Problem Diagnosis
- Ingredient Analysis