Material fatigue test method
Fatigue test can predict the fatigue strength of materials or components under alternating load. Generally, the test period is longer and the equipment required is more complicated, but due to general mechanical tests such as static tensile, hardness and impact tests, It is able to provide the performance of materials under repeated alternating loads, so fatigue testing of important components is a must.
MTS 810
Some common test methods for metal material fatigue test usually include single point fatigue test method, lifting method, high frequency vibration test method, ultrasonic fatigue test method, infrared thermal image technology fatigue test method and the like.
>>>>Single point fatigue test
It is suitable for the service of metal material components under the conditions of rotating and bending load at room temperature, high temperature or corrosive air. In this method, when the number of samples is limited, the fatigue curve can be approximated and the fatigue limit can be roughly estimated. The fatigue testing machine required for the test is generally a bending fatigue testing machine and a tensile testing machine.
>>>> Lifting fatigue test
Lifting fatigue test is a relatively common and accurate method to obtain the fatigue limit of metal materials or structures. The fatigue strength of materials or structures based on the fatigue strength test or the specified life can not be directly determined by experiments. In the case of the fatigue strength, the fatigue strength is generally measured indirectly by the lifting method fatigue test.
It is mainly used to determine the random characteristics of material or structural fatigue strength in medium and long life zones. The required testing machine is generally a tensile and fatigue testing machine.
>>>>High frequency vibration fatigue test method
In the conventional fatigue test, the frequency of the alternating load is generally lower than 200 Hz, and it is impossible to accurately measure the fatigue damage of some parts in a high-frequency environment. The high-frequency vibration test uses the test equipment to generate an alternating inertial force with a cyclic load frequency of about 1000 Hz to act on the fatigue specimen, which can satisfy the fatigue performance of the metal material in high frequency, low amplitude and high cycle environment.
The high frequency vibration test is mainly used for the needs of military and civilian mechanical engineering. The test device usually includes a controller, a charge adapter, a power amplifier, an accelerometer, a vibration table, and the like.
>>>>Ultrasonic fatigue test
The ultrasonic fatigue test is an accelerated resonance fatigue test method whose test frequency (20 kHz) far exceeds the conventional fatigue test frequency (less than 200 Hz). Ultrasonic fatigue testing can be carried out under different load characteristics, different environments and temperatures, providing a good means for fatigue research. Ultrasonic fatigue test is generally used for ultra-high cycle fatigue test, mainly for weekly fatigue test of 10^9 or more. In high-cycle fatigue, the material is mainly elastic in the macroscopic view, so the elastic relationship of stress, strain and other parameters is used in the damage constitutive relation, and micro-plasticity is not involved.
>>>>Infrared thermal imaging technology fatigue test method
In order to shorten the test time and reduce the test cost, the energy method has become one of the important methods for fatigue test research. The fatigue of metal materials is a process of dissipating energy, and temperature change is an important parameter to study the energy dissipation of fatigue process.
Infrared thermal imaging technology is a wavelength conversion technology that converts the target thermal radiation into visible light. It uses the difference of the thermal radiation of each part of the target to obtain a two-dimensional visible image, using computer image processing technology and infrared temperature calibration technology. Realize the display, analysis and accurate measurement of the temperature field distribution of the surface of the object. The materials used in the test are usually galvanized and normalized metal materials. In order to increase the specific emissivity of the metal surface, a very thin layer of infrared transmission coating is usually applied to the surface of the sample during the test.
Fatigue fracture test standard
1 Metal material fatigue, fracture test standard
(1) ASTM related standards
ASTM E739 Linear or Linearized Stress-Life (SN) and Strain-Life (eN)
ASTM E647 fatigue crack growth rate test method
ASTM E468 Standard Practice for Presentation of Constant Amplitude Fatigue Test Results for Metallic Materials
ASTM E466 Metallic material force control constant amplitude axial fatigue test method
ASTM E399 Standard Test Method for Linear-Elastic Plane-Strain Fracture Toughness of Metallic Material
ASTM E561 Standard Test Method for KR Curve Determination
ASTM E740 Standard Practice for Fracture Testing with Surface-Crack Tension Specimens
ASTM E1152 Standard Test Method for determining JR Curves
ASTM E1820 Standard Test Method for Measurement of Fracture Toughness
ASTM E606/E606M Standard Test Method for Strain-Controlled Fatigue Testing
ASTM E1942 Standard Guide for Evaluating Data Acquisition Systems Used in Cyclic Fatigue and Fracture Mechanics Testing
ASTM E2472 Standard Test Method for Determination of Resistance to Stable Crack Extension under Low-Constraint Conditions
ASTM B646 Standard Practice for Fracture Toughness Testing of luminum Alloys
ASTM E2818 Standard Practice for Determination of Quasistatic Fracture Toughness of Welds
(2) GB related standards
GB/T 3075 metal axial fatigue test method
GB/T 6398 metal material crack propagation test method
GB/T 4337 metal rotary bending fatigue test method
GB/T 7733 metal rotary bending corrosion fatigue test method
GB/T 12443 metal torsional stress fatigue test method
GB/T 7732 Metallic material surface crack tensile specimen tensile toughness test method
GB/T 21143 Unified test method for quasi-static fracture toughness of metallic materials
GB/T 24176 metal material fatigue test data statistical scheme and analysis method
GB/T 2107 metal high temperature rotating bending fatigue test method
GB/T15248 axial material equal amplitude low cycle fatigue test method
GB/T10622 Metallic material rolling contact fatigue test
GB/T 4161 Metallic material plane strain fracture toughness test method
GB/T 2038 metal material ductile fracture toughness test method
GB/T 26077 metal material fatigue test axial strain control method
GB/T 26076 metal sheet (belt) axial force control fatigue test method
GB/T 27595 Test method for tensile shear fatigue properties of adhesive structural adhesives
GB/T 12443 metal material torsional stress fatigue test method
GB/T 13682 threaded fastener axial fatigue test method
Method for correcting the constraint loss of crack tip opening displacement (CTOD) fracture toughness in fracture evaluation of GB/T 30064 steel
GB/T 24522 Test method for determining stable crack propagation resistance of low-binding specimens of metallic materials
GB/T 28896 Test method for determination of quasi-static fracture toughness of welded joints of metallic materials
GB/T 27551 Metal material weld destructive test fracture test
(3) HB related standards
Test method for plane strain fracture toughness of HB 5142 metal materials
HB 5152 metal room temperature rotary bending fatigue test method
HB 5153 metal high temperature rotating bending fatigue test method
HB 5217 metal low cycle thermal fatigue test method
HB 5277 engine blade flat and material vibration fatigue test method
HB 5287 metal material axial loading fatigue test method
HB 5279 Metal sheet surface crack fracture toughness test method
Test method for fracture toughness of HB 5487 aluminum alloy
HB 6626 Test method for fatigue crack growth rate of metallic materials in aqueous media
HB 7572 metal material (herringbone notch) plane strain fracture toughness test method
High-temperature fatigue crack growth rate test method for HB 7680 metal materials
HB 7705 metal material fatigue small crack growth rate test method
Bending fatigue test of HB 6442 aircraft hydraulic conduit and connecting piece
HB 7680 high temperature fatigue crack growth rate test method
HB 5261 metal sheet KR curve test method
HB 6660 sheet metal thermal fatigue test method
HB 7110 Metallic material detail fatigue rated strength cutoff (DFRcutoff) test method
HB/Z 112 material fatigue test statistical analysis method
HB 20041 Aeroengine shaft component fatigue test method
(4) GJB related standards
GJB 2030 test method for fracture toughness of metallic materials at high temperature
GJB 1997 Axial corrosion fatigue test method for metallic materials
GJB 715.30A Fastener Test Method - Tensile Fatigue
GJB 715.30 Fastener Test Method - Tensile Fatigue
GJB 715.9 Fastener Test Method - Shear Joint Fatigue
2 Composite fatigue and fracture test standards
(1) ASTM related standards
ASTM D5528 Standard Test Method for ModeI Interlaminar Fracture Toughness of Unidirectional Fiber-Reinforced Polymer Matrix Composites
ASTM D3479/D3479 MStandard Test Method for Tension-Tension Fatigue of Polymer Matrix Composite Materials
ASTM D7774 Standard Test Method for Flexural Fatigue Properties of Plastics
ASTM D7791 Standard Test Method for Uniaxial Fatigue Properties of Plastics
ASTM D4482 Standard Test Method for Rubber Property-ExtensionCycling Fatigue
ASTM D7615/D7615M Standard Practice for Open-Hole Fatigue Response of Polymer Matrix Composite Laminates
ASTM D3166 Standard Test Method for Fatigue Properties of Adhesives in Shear by Tension Loading (Metal/Metal)
ASTM D6115 Standard Test Method for ModeI Fatigue Delamination Growth Onset of Unidirectional Fiber-Reinforced Polymer atrixComposites
ASTM E1049 Standard Practices for Cycle Counting in Fatigue Analysis
(2) GB related standards
GB/T 16779 fiber reinforced plastic laminates tensile-pull fatigue performance test method
GB/T 28891-2012 Determination of interlaminar fracture toughness of unidirectional reinforcing materials of fiber reinforced plastic composites
(3) HB related standards
Bending fatigue test method for HB 7624 carbon fiber composite laminate
HB 5268 plexiglass sheet fracture toughness test method
Test method for interlaminar fracture toughness of HB 7402 carbon fiber composite laminates
HB 7403 carbon fiber composite laminates type II interlayer fracture toughness test method
Carbon fibre composites -- Test methods for interlaminar fracture toughness under wet heat -- Part 1
Carbon fibre composite composites -- Test methods for interlaminar fracture toughness - Part 2
(4) GJB related standards
Test method for tensile toughness of tensile layer of GJB 586 fiber reinforced plastic laminate
GJB 2637 carbon fiber resin matrix composite laminate fatigue test method
GJB 2033 Aerospace plexiglass tensile fatigue test method
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