Materials Testing

Composites

Composite materials are those made from two or more other materials with significantly different physical or chemical properties, that when combined, produce a new material with characteristics different from the individual components. Nevertheless, internal components remain separate and distinct inside the finished structure. The new material used to be industrially preferred for being stiffener and lighter.

Composite materials testing include, fiber reinforced polymer, sandwiches, core materials, thermoset and thermoplastic prepregs, films, adhesives and resins.

TEAMS has extensive experience in composites testing. Due to their particular anisotropic nature, sensitive to fiber orientation, special care must be taken from former operations (traceability and machining) through test performance and results assessment.

TEAMS accredited laboratory is able to perform incoming inspection and recertification testing of prepregs, adhesive films and resins. Routine monitoring for production controls is one of our main activities and we are aware of the importance of on-time delivery commitment. We are specialist in these types of controls which include both physical and mechanical tests.

TEAMS the capability to develop customized testing methods and/or fixtures designs to meet exactly what your company needs. TEAMS assists their clients during the whole project.

Besides our experience, accurate measurements are granted through PTP (Proficiency Testing Programs) and state-of-the-art equipment. Proficiency Testing Programs are statistical quality assurance programs that enable laboratories to assess the performance in conducting testing methods when their data are compared against others laboratories that participate worldwide in the same program. Calibration of testing instruments is mandatory according to EN 17025, the scope of calibration is to maintain aligned the measurements with international standards.

All our equipment is under quality assurance control, main verifications:

  • Force according ASTM E4 / ISO 7500-1
  • Extensometer and COD according to ASTM E83, ISO 9513, ASTM E399
  • Load Frame alignment verification according to ASTM E1012 and Nadcap requirements
  • Displacement – Linear verification
  • Speed – Linear verification
  • Temperature cabinets verification
  • Software validation
STATIC TESTING
Static testing is the most used in mechanical characterization to determine the main figures of the material behavior: strength, modulus and strain at failure.

TEAMS’ technicians are expert in:

  • Conventional tension and compression tests, plain or notched specimens (open hole and filled hole also included)
  • Combined compression loading (CLC) means Hydraulic Composite Compression Fixture (HCCF)
  • In-plane Shear Strength
  • Rail Shear Strength
  • Short Beam Shear
  • Assemblies: Bearing supported and un-supported
  • Impact drop testing
  • Damage resistance: compression after impact CAI, compression after impact edge CAIE
  • Damage developed during loading of composites and Unfolding tests (ILTT)
  • Specimen condition/ageing
  • (….among many others under ASTM/ EN ISO / AITM / Boeing/ …)
These tests may be performed at room temperature (RT, standard controlled atmosphere), high temperature (HT) or low temperature (LT) by temperature chambers coupled to the mechanical testing machines. (Loads up to 250KN, temperature range -100ºC to +300ºC, Data acquisition systems for strain gages measurements, LVDT for extra displacement measures, others special extras TBC).

[…more about standards and testing methods]
FATIGUE TESTING
Nowadays, to have a deep knowledge of the fatigue behavior in reinforced plastics is one of main concerns. Although composites materials are known for their good resistance in fatigue compared to metal materials, to enhance the knowledge of their fatigue characteristics is needed to take advantage of their potential and increase the confidence in their widespread use. Damage progression, durability including the effect of moisture content, ageing and high temperature, how assemblies under fatigue stress and many other topics may be investigated through testing.

Fatigue tests to composites include not only plain or notched tensile and compression (in laminates and/or sandwich constructions), but also assemblies (supported and un-supported) under fatigue, damage tolerance and the study of other mechanisms which require the use of special fixtures like unfolding tests (ILTS) and bending tests.

At TEAMS facilities tests may be performed under standard controlled atmosphere, high temperature (HT) or low temperature (LT) means temperature chambers coupled to the mechanical testing machines. (Loads up to 250KN, temperature range -70ºC to +300ºC, others TBC).

[…more about standards and testing methods]