MATERIALS CHARACTERIZATION


CONVENTIONAL CHARACTERIZATION

AMS staff has huge experience in Material Science and Fracture Mechanics, its members have worked in R&D departments in civil and aeronautical private sector and in research groups at university. AMS offers a complete advisory concerning mechanical testing of materials including:
Caracterización mecánica de materiales por medio de técnicas no convencionales


  • Design of experimental programs
  • Flexural strength,tensile and compression
  • Creep tests
  • Fatigue and fracture tests
  • Cryogenic Testing
  • High temperature tests
  • Tests in vacuum
  • X-ray diffraction
  • Neutron diffraction
  • Residual stresses

NON-CONVENTIONAL CHARACTERIZATION

ADVANCED MATERIAL SIMULATION, in collaboration with the Materials Science Departmentof the Universidad Politécnica of Madrid, has developed a novel technique for materials characterization based on non-conventional tests.

The measurement of material mechanical properties is usually carried out by means of simple specimens, as uniaxial tensile and compression tests, or standard geometries, as the toughness fracture tests. This characterization is not always possible due to geometrical constraints or materials difficulties. In these situations alternative strategies are proposed by AMS.

The methodology is based on combining experiments, numerical calculations and nonlinear optimization algorithms. Thanks to this procedure it is possible to determine the mechanical and fracture properties of materials. The procedure has been successfully applied to determine the following magnitudes:

ALGORITHM 1
  • Plastic stress-strain curve in nuclear fuel cladding from the ring tensile test
  • Plastic stress-strain curve in nuclear fuel cladding from the ring tensile test
  • Plastic stress-strain curve in A533 steel from notch round tesile specimens
  • Plastic stress-strain curve from spherical nanoidentation tests
  • Calculation of fracture energy in hydrided fuel cladding from diametral compression tests
  • Calculation of fracture toughness vessel steels from notched tensile tests

The results of these works have been publish in scientific journals and proceeding of international meetings as appear in AMS-Publications

The triple combination of experimental results, numerical calculations by finite elements and nonlinear optimization algorithms allows to determine the mechanical and fracture properties of materials in extreme conditions, where it is not possible standard mechanical tests.

Possible Applications

  • Characterisation of materials at different temperatures and deformation speeds
  • Mechanical properties of irradiated materials
  • Mechanical characterization of welds
  • Mechanical behavior of coatings or layers of oxide possible

An overview of the method could be observed in the next figures.


  • AMS inverse analysis algorithm to determine the plastic stress-strain.

Caracterización mecánica de materiales por medio de técnicas no convencionales

  • Estimation of fracture toughness tests using non-standard tests. The toughness of KIC or the integral initiation JIC obtained from standard fracture tests that require large amounts of material. An alternative method is to use mechanical tests where a crack propagates stably and the cohesive zone model.

Caracterización mecánica de materiales por medio de técnicas no convencionales




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