A5090246445- Shape Memory Alloy Transformations
- Metal Forming Simulation Techniques
- Titanium Alloys Microstructure and Properties
- Numerical methods in engineering
- Structural Behavior of Reinforced Concrete
- Advanced Welding Techniques Analysis
- Rock Mechanics and Modeling
- Geotechnical Engineering and Underground Structures
- Innovative concrete reinforcement materials
- Metallurgy and Material Forming
- Elasticity and Wave Propagation
- Industrial Technology and Control Systems
- Concrete Corrosion and Durability
- High Entropy Alloys Studies
- Aluminum Alloys Composites Properties
- Elasticity and Material Modeling
- Cavitation Phenomena in Pumps
- Structural Response to Dynamic Loads
- Composite Structure Analysis and Optimization
- Concrete and Cement Materials Research
- Advanced Surface Polishing Techniques
- Advancements in Materials Engineering
- High-Velocity Impact and Material Behavior
- Aluminum Alloy Microstructure Properties
- Geotechnical Engineering and Analysis
University of Kragujevac
2013-2024
TiNi shape memory alloy (SMA) is experimentally and numerically investigated in tension tests under different loading rates. The thermomechanical behaviour of the SMA, related to stress-induced martensitic transformation (SIMT) noticed during experimental tests, analysed observations are considered for numerical analysis. Initiation, development saturation SIMT monitored by a fast sensitive infrared camera. estimated temperature changes SMA sample, exothermic forward endothermic reverse...
In practical applications, TiNi shape memory alloys (SMAs) exhibit behavior that can pose a challenge with current constitutive models and their implementations in finite element method (FEM) software. SMA devices typically operate the forward or reverse martensitic transformation regime, which is known as subloop loading. During such cyclic loading–unloading, hysteresis stress–strain loop changes because of material damage, be considered fatigue SMAs. both loading unloading processes,...
Steel structures are designed to operate in an elastic domain, but sometimes plastic strains induce damage and fracture. Besides experimental investigation, a phase-field model (PFDM) emerged as cutting-edge simulation technique for predicting evolution. In this paper, von Mises metal plasticity is modified coupling with PFDM improved simulate ductile behavior of metallic materials or without constant stress plateau after yielding occurs. The proposed improvements are: (1) new variable...
The procedure for identifying concrete damage plasticity material model parameters is presented in this paper. Concrete represents a constitutive which based on combination of theory and mechanics. This often used solving geotechnical problems due to its realistic description mechanical behavior material. Theoretical basis identification are Proposed applied experimental data from uniaxial compression tension load-unload tests taken literature. By applying data, stress-strain curve created....
(1) Modeling and characterization of ductile fracture in metals is still a challenging task the field computational mechanics. Experimental testing offers specific responses form crack-mouth (CMOD) crack-tip (CTOD) opening displacement related to applied force or crack growth. The main aim this paper develop phase-field-based Finite Element Method (FEM) implementation for modeling stainless steel. (2) A Phase-Field Damage Model (PFDM) was coupled with von Mises plasticity...
(1) The paper presents experimental and numerical results of the TiNi shape memory alloy (SMA) subjected to a modified program force-controlled tensile loading. time-dependent development transformation strain under constant-force conditions was investigated describe transformation-induced creep phenomena. (2) Mechanical characteristics SMA were derived using testing machine, whereas temperature changes accompanying its deformation obtained in contactless manner with an infrared camera. A 3D...
A stress-strain history in the material of real concrete structures is usually unknown.An effect degradation analyzed to describe how initial parameter can history.The idea introduce damage structure by calculate internal variables constitutive model.Six numerical examples are proposed verify methodology for various loading conditions.Based on obtained results, it was shown that unknown could be successfully represented using original parameters and concrete.The behavior damaged simulated...
The paper presents the procedure for determining factor of safety (FoS) using strength reduction method (SRM) case a concrete damage plasticity constitutive model. SRM was originally used in slope stability analysis and its original form, this applied by reducing shear material. Since occurs due to exceeding normal stresses principal directions, not strength, modified adapted Instead failure surface, parameters which describe mechanical behavior uniaxial compression tension were reduced. In...
The aluminum alloys (AA) are among the most utilized materials in engineering structures, which induces need for careful investigation, testing, and possibilities accurate simulation of structure’s response. AA 5083-H111 specimens were used to investigate possibility employing a Phase-Field Damage Model (PFDM) structures’ behavior. mechanically tested by uniaxial tensile loading tests. Based on obtained results, PFDM was employed with von Mises plasticity model, implemented Finite Element...
The spot welded thin steel sheets specimens are experimentally and numerically examined in this paper.The two joined using Resistance Spot Welding (RSW) method.The spot-welded joints consist of three zones with different material properties.Change properties during the welding process is caused by mechanical thermal loading.The determined several tension tests.The cut directions regarding a rolling direction basic plate.Shear resistance on universal testing machine displacement-controlled...
This paper aims to highlight importance of coupled thermo-mechanical analysis structures and devices made shape memory alloys (SMA). Ti-Ni are recognized as very biocompatible SMA, so theirs usage is often in medical purpose. Stent implants SMA the best known application such materials, unit cell some typical stent model used demonstrate necessity finite element based numerical structures. The coupling realized partitioned approach, whereas software components for structural (PAKS) heat...
Shape memory alloys (SMA) material is widely used in many applications of interest where it necessary to recover permanent strains.There are constitutive models which describe that phenomenon.The SMA model described by Lagoudas [1] and [2] modified implemented into the PAK software package [3].Development this motivated previous papers Auricchio groups considers governing parameter method applied on phenomenological behavior materials.All variables derived depend effective values stress...
The phenomenological SMA material model proposed by Lagoudas [1] is modified and implemented in finite element software PAK [2]. Critical thermodynamic force derived to match implicit integration method. All variables are depend on effective values of stress, strain martensitic volume fraction. One scalar equation need be solved the point using trial stress direction for each time step. deviatoric provides possibility solve large problems algorithms developed small strains. Two...
Shape memory alloys (SMA) material is widely used in many applications of interest where it necessary to recover permanent strains.There are constitutive models which describe that phenomenon.The SMA model described by Lagoudas [1] and [2] modified implemented into the PAK software package [3].Development this motivated previous papers Auricchio groups considers governing parameter method applied on phenomenological behavior materials.All variables derived depend effective values stress...