ACEEC

• Impact testing


  A technique used to determine a material's ability to resist deformation when subjected to a sudden shock or impulse load
• Impact testing


  • It is a critical property that determines the material's ability to withstand sudden forces
• Different types of impact testing


  • Charpy
  • Izod
  • Drop-weight impact test
  • Dynamic tear test
• Charpy impact test


  A type of impact test where a weighted pendulum hammer is released from a specified height and strikes the part
• Izod impact test


  Similar to the Charpy test in that a weighted pendulum hammer strikes a test specimen containing a V- shaped notch. The primary differences are the size of the test specimen, how it is restrained, and which side is struck by the pendulum hammer
• Drop-weight impact test


  Uses a weight suspended over a simply supported horizontal test specimen and then dropped to produce the impact
• Dynamic tear test


  Similar to the drop-weight impact test, but often used for test specimens with a thickness less than 5/8" while drop-weight impact testing is for test specimens thicker than 5/8"
• Standards for impact testing


  • ASTM E23 / ISO 148-1 (for metals)
  • ASTM D256 / ISO 180 (for plastics)
  • ASTM A370 / ASTM E208 (for steel materials)
• Destructive testing


  Test method conducted to find the exact point of failure of materials, components, or machines. During the process, the tested item undergoes stress that eventually deforms or destroys the material.
• Performers of destructive testing


  • Material scientists
  • Metallurgical and polymer engineers
  • Chemistry and electrochemical process experts
  • Failure analysis experts
  • Quality control analysts
  • Regulatory compliance experts
• Destructive testing and using materials of specific characteristics come as a regulatory requirement. The purpose of destructive testing is ultimately to understand how a material will react to extreme stress or loads.
• Application of destructive testing


  • Testing the strength of safety glass
  • Dropping sandbags at specified heights to simulate impactful forces for failure analysis
  • Applying fire to determine flame resistance
• Destructive testing methods


  • Corrosion testing
  • Hardness testing
  • Tensile elongation test
  • Torsion testing
• Corrosion testing


  Test method done to test the effectiveness of applied corrosion resistance measures. Measuring the characteristics and the rate of corrosion can also be considered to be part of corrosion testing.
• Hardness testing


  Material hardness determines whether components undergo permanent deformation due to stress. Hardness shows how effectively a material resists indentation.
• Tensile elongation test


  Tensile testing is conducted by applying controlled force across test material till it fails (crack, breakage, etc). The measured properties are ultimate tensile strength, breaking strength, and maximum elongation or reduction.
• Types of torsion testing


  • Torsion only
  • Axial-Torsion
  • Failure Testing
  • Proof Testing
  • Functional Testing
• Torsion only


  Applying only torsional loads to the test specimen.
• Axial-Torsion


  Applying both axial (tension or compression) and torsional forces to the test specimen.
• Failure Testing


  Twisting the product, component, or specimen until failure. Failure can be classified as either a physical break or a kink/defect in the specimen.
• Proof Testing


  Applying a torsional load and holding this torque load for a fixed amount of time.
• Functional Testing


  Testing complete assemblies or products such as bottle caps, switches, dial pens, or steering columns to verify that the product performs as expected under torsion loads.
• Stress testing


  An umbrella term used to describe a scenario in which we apply a combination of different testing methods. The testing focuses on the forces that are anticipated to happen during regular operations.
• Aggressive environment testing


  Materials are tested based on the characteristics of the environment they will be operating in.
• Environmental factors impacting machines


  • Temperature
  • Pressure
  • Humidity
  • Salinity
  • Chemical exposure
  • Exposure to other elements or natural forces
• Residual stress testing


  Internal stress experienced by different components without any external loads present. It is a measure that determines if a component can withstand extreme load and stress conditions during its service life.
• Fatigue


  Weakening of a material or structure over time, brought about by repetitive or cyclic stress. Estimated to causes 90% of all of mechanical failures. Manifests through repetitive stress cycles, exerted on a material or structure, which can fluctuate both above and below its yield strength.
• Fatigue testing


  Used to evaluate a material's ability to endure cyclic loading conditions, such as tension, compression, bending, or torsion. Material undergoes repeated loading and unloading cycles until failure or a predetermined number of cycles is reached to determine the material's lifespan and maximum load capacity.