Intergranular Strain Evolution During Biaxial Loading: A Multiscale FE-FFT Approach.
M V Upadhyay1, J Capek1,2,3, S Van Petegem1
11Swiss Light Source, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
JOM (Warrendale, Pa. : 1989)
|February 28, 2020
Summary
This study uses a multiscale approach to analyze intergranular lattice strain in 316L steel under various loads. Grain neighborhood significantly influences strain evolution, impacting material behavior prediction.
Area of Science:
- Materials Science
- Mechanical Engineering
- Computational Modeling
Background:
- Predicting metal and alloy mechanical response requires multiscale models and characterization.
- Understanding intergranular strain evolution is crucial for material behavior prediction.
Purpose of the Study:
- To investigate intergranular lattice strain evolution in 316L steel using a multiscale approach.
- To compare strain evolution under uniaxial and equibiaxial loading conditions.
Main Methods:
- In situ neutron diffraction on dog bone and cruciform 316L samples.
- Finite element simulations for macroscale stress analysis.
- Fast Fourier Transform (FFT) crystal plasticity model for mesoscale simulations.
Main Results:
- Demonstrated differences in intergranular lattice strain evolution across various grain families.
- Highlighted the influence of grain neighborhood on strain development.
- Validated the multiscale approach for predicting mechanical response.
Conclusions:
- The multiscale modeling framework accurately captures complex material behavior.
- Grain neighborhood is a critical factor in intergranular strain evolution.
- This approach enhances the prediction of mechanical responses in metals and alloys.
More Related Videos
07:37Full-field Strain Measurements for Microstructurally Small Fatigue Crack Propagation Using Digital Image Correlation Method
Published on: January 16, 2019
10.0K
11:28A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
Published on: May 18, 2015
12.9K
Related Concept Videos
01:15Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity
480
Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
480
01:20Normal Strain under Axial Loading
1.0K
Normal strain under axial loading is an important concept in the field of mechanics of materials. Axial loading implies the application of a force along the axis of a material, like a column or bar. This force can either compress or stretch the material. In the context of axial loading, normal strain is the deformation experienced by the material in the direction of the loading force. It's calculated as the change in length divided by the original length of the material. This unitless ratio...
1.0K
01:20Elastic Strain Energy for Shearing Stresses
435
As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...
435
01:12Transformation of Plane Strain
437
When analyzing elongated structures like bars subjected to uniformly distributed loads, it is essential to understand the transformation of plane strain when coordinate axes are rotated. This transformation helps to assess how material deformation characteristics vary with orientation, which is crucial in materials science and structural engineering.
Under plane strain conditions, typical for members where one dimension significantly exceeds the others, deformations and resultant strains are...
Under plane strain conditions, typical for members where one dimension significantly exceeds the others, deformations and resultant strains are...
437
01:20Shearing Strain
1.1K
The shearing strain represents a cubic element's angular change when subjected to shearing stress. This type of stress can transform a cube into an oblique parallelepiped without influencing normal strains. The cubic element experiences a significant transformation when exposed solely to shearing stress. Its shape alters from a perfect cube into a rhomboid, clearly demonstrating the effect of shearing strain. The degree of this strain is considered positive if it reduces the angle between the...
1.1K
01:29Three-Dimensional Analysis of Strain
534
Three-dimensional strain analysis is crucial for understanding how materials deform under stress, particularly in elastic, homogeneous materials. This method employs principal stress axes to simplify complex stress states into more understandable forms. Subjected to stress, a small cubic element within a material either expands or contracts along these axes, transforming into a rectangular parallelepiped. This transformation effectively illustrates the material's deformation. The principal...
534