Damage Simulation For The Disaster Merit Of
Light Substances
Author(s)
P. Brož
Abstract
In general, dynamic failures of metal construction embrace a large variety of
plastic strain rates. These influences must be taken via viscoplasticity, coupled
with damage. For this problem two damage models, Gologanu’s and Lemaitre’s,
are convenient; they are modified by the Hill potential to take account of
material anisotropy. To stipulate the damage parameters of the model concerned,
an inverse routine employing the optimizer to correlate the experimental and
numerical responses of notched specimen tension tests is applied. This method
was used to measure components being composed of the selected material and
resulted in suitable values of damaged parameters in an appropriate time for
numerical modelling. These quantities come from an optimization method that
yields the best solution potential for a variety of possibilities. Both damage
models by virtue of the damage mechanics are put on Gologanu’s simulation,
which concentrates on the progress of ellipsoidal microvoids in the course of
plastic strain, and Lemaitre’s, which applies a comprehensive damage variable
that evolves the strain energy density release rate. When elaborating the damage
parameter identification method, static and dynamic tests are utilized. The said
damage system is used for the aluminium structural component.
Keywords: aluminium material, crash failure ductility, ellipsoidal microvoid,
failure modelling, finite element codes, high strain rate, inverse technique.
1 Introduction
A great saving of weight, and disaster merit protection, is possible merely by the
application of modern design intentions and use of lightweight substances, which
have restricted ductility and a complicated failure. The failure possibility is thus
Keywords
aluminium material, crash failure ductility, ellipsoidal microvoid,
failure modelling, finite element codes, high strain rate, inverse technique
Related Book
Other papers in this volume
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