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Article
Modeling and Characterization of Cyclic Shape Memory Behaviors of the Binary Ni49.9Ti50.1 Material System
In this work, we address two of the main challenges encountered in constitutive modeling of the thermomechanical behaviors of actuation-based shape memory alloys. Firstly, the complexity of behavior under cycl...
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Article
Erratum to: A Comparative Study of Ni49.9Ti50.1 and Ni50.3Ti29.7Hf20 Tube Actuators
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Article
A Comparative Study of Ni49.9Ti50.1 and Ni50.3Ti29.7Hf20 Tube Actuators
A shape memory alloy (SMA) actuator typically has to operate for a large number of thermomechanical cycles due to its application requirements. Therefore, it is necessary to understand the cyclic behavioral re...
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Article
Parameter-Estimation Algorithms for Characterizing a Class of Isotropic and Anisotropic Viscoplastic Material Models
A number of robust, and computationally efficient, algorithms arepresented for the development of an overall strategy to estimate thematerial parameters characterizing a class of complex viscoplasticmaterial m...
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Article
Nonlinear material parameter estimation for characterizing hyper elastic large strain models
An automated, systematic, and computationally efficient methodology to estimate the material parameters for characterizing general nonlinear material models for large strain analysis (e.g., hyperelastic and h...
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Article
An Implicit integration scheme for generalized viscoplasticity with dynamic recovery
This paper is concerned with the development of a general implicit time-step** integrator for the flow and evolution equations in a recent representative class of generalized viscoplastic models, involving bot...
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Article
Large strain analysis of rubber-like materials based on a perturbed Lagrangian variational principle
A mixed finite element method is presented for the large strain analysis of rubber-like materials, which are considered to be nearly incompressible. Two types of constitutive relations are included: generalize...
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Chapter
Analysis of Finitely-Deformed Shells Using Low-Order Mixed Models
The general framework for the fully nonlinear analysis of shells is developed using two, low-order, mixed models of the quadrilateral (HMSH5) and triangular (HMSH3) type. An updated-Lagrange description is ado...
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Chapter and Conference Paper
A Mixed Finite Element Formulation for Contact Analysis with Friction
Many engineering problems of practical interest involve contact between two solids whereby friction plays an important role in modeling the interfacial behavior. Friction not only affects the deformation state...
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Chapter and Conference Paper
Nonlinear Applications of Low Order C°-Elements for Plates and Shells
Two types of low order mixed elements, i.e. a 3-node triangle and a 5-node quadrilateral, have been developed previously for the linear elastic analysis of plates and shells. These elements are suitable for th...
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Article
On the symbolic manipulation and code generation for elasto-plastic material matrices
A computerized procedure for symbolic manipulations and FORTRAN code generation of elasto-plastic material matrix for finite element applications is presented. Special emphasis is placed on expression simplifi...
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Chapter and Conference Paper
On the Selection of Stress Parameters for Hybrid/Mixed Finite Elements
Rationales for selection of stress parameters of hybrid/mixed finite elements are discussed in some details. Specific guidelines are then given for choosing appropriate stress terms in conjunction with the ass...
