Computational shape optimisation for a gradient-enhanced continuum damage model
نویسندگان
چکیده
منابع مشابه
a continuum/discontinuum micro plane damage model for concrete
analysis and prediction of structural response to static or dynamic loading requires prediction of concrete response tovariable load histories. the constitutive equations for the mechanical behavior of concrete capable of seeing damage effects or crack growth procedure under loading/unloading/reloading was developed upon micro-plane framework. the proposed damage formulation has been built on t...
متن کاملMultilevel gradient method with Bézier parametrisation for aerodynamic shape optimisation
Since the evaluation of the cost functional requires the solution of the governing flow equations (0.2), each optimisation iteration is characterised by a high computational cost if complex flow modelling is considered. In this context, the improvement of optimisation algorithm efficiency is crucial. In [2] a multilevel strategy has been defined to make the convergence rate of a gradient-based ...
متن کاملSecond order sensitivity analysis for shape optimization of continuum structures
This study focuses on the optimization of the plane structure. Sequential quadratic programming (SQP) will be utilized, which is one of the most efficient methods for solving nonlinearly constrained optimization problems. A new formulation for the second order sensitivity analysis of the two-dimensional finite element will be developed. All the second order required derivatives will be calculat...
متن کاملA Gradient Enhancement with Application to Anisotropic Continuum Damage
Abstract.The paper focuses on the modelling of the quasi-brittle failure of materials with a heterogeneous microstructure. Failure induced anisotropy is incorporated in terms of the microplane theory. This theory is based on scalar damage laws formulated on several individual material planes. Anisotropy of the overall constitutive law is introduced in a natural fashion by transforming the scala...
متن کاملA Continuum Model For Stone-wales Defected Carbon Nanotubes
In this paper, a continuum model is proposed so that a Stone-Wales (SW) defected carbon nanotube (CNT) is replaced by an initial circumferential crack in a continuum cylindrical shell. For this purpose, the critical energy release rate and then the fracture toughness of a defected CNT are calculated using the results of an existing atomistic-based continuum finite element simulation. Finally, t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Computational Mechanics
سال: 2020
ISSN: 0178-7675,1432-0924
DOI: 10.1007/s00466-019-01810-3