Archives

Impact location and quantification on an aluminum sandwich panel using principal component analysis and linear approximation with maximum entropy

  • March 30, 2017
  • Comments off

Entropy Vol. 19, No. 4, pp. 137, 2017 V. Meruane, P. Véliz, E. López Droguett, A. Ortiz-Bernardin Abstract To avoid structural failures it is of critical importance to detect, locate and quantify impact damage as soon as it occurs. This can be achieved by impact identification methodologies, which continuously monitor the structure, detecting, locating, and quantifying

Read More » Read More

Accepted Paper: Consistent and stable meshfree Galerkin methods using the virtual element decomposition

  • January 24, 2017
  • Comments off

Paper Accepted for Publication in the International Journal for Numerical Methods in Engineering A. Ortiz-Bernardin, A. Russo, N. Sukumar, “Consistent and stable meshfree Galerkin methods using the virtual element decomposition.” ABSTRACT Over the past two decades, meshfree methods have undergone significant development as a numerical tool to solve partial differential equations (PDEs). In contrast to

Read More » Read More

Consistent and stable meshfree Galerkin methods using the virtual element decomposition

  • January 24, 2017
  • Comments off

International Journal for Numerical Methods in Engineering Vol. 112, No. 7, pp 655-684, 2017 A. Ortiz-Bernardin, A. Russo, N. Sukumar Abstract Over the past two decades, meshfree methods have undergone significant development as a numerical tool to solve partial differential equations (PDEs). In contrast to finite elements, the basis functions in meshfree methods are smooth

Read More » Read More

Precauciones acerca del uso del elemento beam en simulaciones por el método del elemento finito

  • December 2, 2016
  • Comments off

(The following document is an unpublished article.) A. Ortiz-Bernardin Resumen En este artículo se presenta la resolución numérica mediante el método del elemento finito de dos problemas de mecánica estructural, con los que se pretende precaver al diseñador de estructuras de las problemáticas que podrían resultar de modelaciones basadas en el elemento finito tipo beam, perjudicando

Read More » Read More

Paper Submitted: Consistent and stable meshfree Galerkin methods using the virtual element decomposition

  • November 7, 2016
  • Comments off

A. Ortiz-Bernardin, A. Russo, N. Sukumar, “Consistent and stable meshfree Galerkin methods using the virtual element decomposition,” submitted. ABSTRACT Over the past two decades, meshfree methods have undergone significant development as a numerical tool to solve partial differential equations (PDEs). In contrast to finite elements, the basis functions in meshfree method are smooth (nonpolynomial functions),

Read More » Read More

On the use of implicit constitutive relations to model the behaviour of elastic and inelastic deformations in continua: Applications to the mathematical modelling of rock

  • August 24, 2016
  • Comments off

2016 – 2020 Principal Investigator: Roger Bustamante. Co-Investigator: Alejandro Ortiz-Bernardin. Project funded by CONICYT-FONDECYT (Grant Nº 1160030) Geomaterials such as rock and soil can show a plethora of nonlinear phenomena regarding their mechanical behaviour, such as: hysteresis (i.e., dependency of the mechanical properties in the load history), nonlinear relations between stresses and strains (even in the

Read More » Read More

Accepted Paper: A novel impact identification algorithm based on a linear approximation with maximum entropy

  • August 8, 2016
  • Comments off

Paper Accepted for Publication in Smart Materials and Structures N. Sanchez, V. Meruane, A. Ortiz-Bernardin, “A novel impact identification algorithm based on a linear approximation with maximum entropy.” ABSTRACT This article presents a novel impact identification algorithm that uses a linear approximation handled by a statistical inference model based on the maximum-entropy principle, termed linear

Read More » Read More

A novel impact identification algorithm based on a linear approximation with maximum entropy

  • August 8, 2016
  • Comments off

Smart Materials and Structures Vol. 25, No. 9, pp. 095050, 2016 N. Sanchez, V. Meruane, A. Ortiz-Bernardin Abstract This article presents a novel impact identification algorithm that uses a linear approximation handled by a statistical inference model based on the maximum-entropy principle, termed linear approximation with maximum entropy (LME). Unlike other regression algorithms as Artificial

Read More » Read More

Paper Accepted: Linear smoothed polygonal and polyhedral finite elements

  • June 1, 2016
  • Comments off

Paper Accepted for Publication in International Journal for Numerical Methods in Engineering A. Francis, A. Ortiz-Bernardin, SPA. Bordas, S. Natarajan, “Linear smoothed polygonal and polyhedral finite elements.” ABSTRACT It was observed in [1, 2] that the strain smoothing technique over higher order elements and arbitrary polytopes yields less accurate solutions than other techniques such as

Read More » Read More