Abstract
A comprehensive continuum damage mechanics model [1] had been developed to capture the detailed behaviour of a composite structure under a crushing load. This paper explores some of the difficulties encountered in the implementation of this model and their mitigation. The use of reduced integration element and a strain softening model both negatively affect the accuracy and stability of the simulation. Damage localisation effects demanded an accurate measure of characteristic length. A robust algorithm for determining the characteristic length was implemented. Testing showed that this algorithm produced marked improvements over the use of the default characteristic length provided by Abaqus. Zero-energy or hourglass modes, in reduced integration elements, led to reduced resistance to bending. This was compounded by the strain softening model, which led to the formation of elements with little resistance to deformation that could invert if left unchecked. It was shown, through benchmark testing, that by deleting elements with excess distortions and controlling the mesh using inbuilt distortion/hourglass controls, these issues can be alleviated. These techniques contributed significantly to the viability and usability of the damage model.
Original language | English |
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Title of host publication | Advances of Computational Mechanics in Australia |
Editors | Yuantong Gu, Hong Guan, Emilie Sauret, Suvash Saha, Haifei Zhan, Rodney Persky |
Place of Publication | Pfaffikon Switzerland |
Publisher | Trans Tech Publications |
Pages | 217-224 |
Number of pages | 8 |
ISBN (Print) | 9783038355281 |
DOIs | |
Publication status | Published - 25 Jul 2016 |
Event | Australasian Conference on Computational Mechanics 2015 - Brisbane, Australia Duration: 30 Nov 2015 → 1 Dec 2015 Conference number: 2nd https://accm2015.lamses.org/ https://www.scientific.net/AMM.846.-5.pdf (Preface) |
Publication series
Name | Applied Mechanics and Materials |
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Publisher | Trans Tech Publications |
Volume | 846 |
ISSN (Print) | 1660-9336 |
ISSN (Electronic) | 1662-7482 |
Conference
Conference | Australasian Conference on Computational Mechanics 2015 |
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Abbreviated title | ACCM 2015 |
Country/Territory | Australia |
City | Brisbane |
Period | 30/11/15 → 1/12/15 |
Internet address |
Keywords
- Composite Damage
- Nonlinear Finite Element