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Impact dynamics - Techdyn Engineering 2014

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IMPACT DYNAMICS AND SHOCK COMPRESSION OF CONDENSED MATTER

For more than a decade our staff consultants worked on high velocity impact  problems addressing both computational and experimental aspects. Today, TECHDYN Engineering has a strong technical background in material modeling at high strain rates, fragmentation, ballistics and experimental characterization under high velocity impact conditions.

COMPUTATIONAL CAPABILITIES
Computational capabilities includes simulation of high velocity dynamic events with explicit (LSDYNA,  MSC.DYTRAN) ) and implicit FEM codes (MSC.MARC) as well as with hydrocodes (AUTODYN).

EXPERIMENTAL CAPABILITIES
Experimental capabilities are fundamental for understanding the phenomena occurring in fast dynamic transients. Our equipment includes:

  • Hopkinson pressure bar (tension/compression)

  • Light gas gun ranging from 6.0 mm up to 40 mm bore

  • Drop weight

  • Charpy hammer

  • High speed video recording (up to 0.5Mfps)

METHODOLOGY
In the study of dynamic response of materials, Techdyn Engineering uses a combined approach that makes use of characterization tests and validation tests. Chracterization tests are those in which material repsonse can be measured under controlled testing conditions. Validations tests are those that tests in which post-mortem measures can be used to validate models or to calibrate model parameters using reverse engineering approach based on an iterative use of numerical simulation.

VALIDATION TESTS

  • Taylor anvil impact test

  • Rod-on-rod impact test

  • Dynamic tensile extrusion test (DTE)

  • ECAP (Equal Channel Angular Pressing)

  • Scaled Energy Impact test (low velocity- high mass; low mass- high velocity)

  • Expansion ring

  • Fragmentation test

 
 

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