Related Experiment Video
Updated: May 31, 2025
10:52
Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System
Published on: August 7, 2018
8.5K
Steel Ball Impact on SiC/AlSi12 Interpenetrated Composite by Peridynamics
Eligiusz Postek1, Tomasz Sadowski2, Jajnabalkya Guhathakurta3
1Department of Information and Computational Science, Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawinskiego St. 5B, 02-106 Warsaw, Poland.
Materials (Basel, Switzerland)
|January 25, 2025
Summary
This study investigates silicon carbide/aluminum alloy composites, revealing that matrix porosity significantly impacts plastic strain concentration and sample fragmentation during impact. Damage to the high-stiffness skeleton remains largely unaffected by porosity.
Area of Science:
- Materials Science
- Mechanical Engineering
- Computational Mechanics
Background:
- Silicon carbide (SiC) foam reinforced aluminum alloy (AlSi12) composites are fabricated via pressurized casting.
- The SiC foam acts as a high-stiffness skeleton, enhancing the aluminum alloy matrix.
- Understanding the material's behavior under impact, considering internal structure, is crucial.
Purpose of the Study:
- To analyze the behavior of SiC/AlSi12 composites with varying porosity under impact.
- To investigate the influence of pore shape and distribution on material response.
- To model and understand the fragmentation and spallation tendencies.
Main Methods:
- X-ray computed tomography for detailed microstructural analysis of pore distribution.
- Peridynamics computational modeling to simulate impact dynamics.
- Comparison of porous and non-porous composite samples under steel ball impact.
Main Results:
- Porosity significantly influences equivalent plastic strain development, leading to higher concentrations in porous matrices.
- While plastic strain fields differ, damage to the SiC skeleton is minimally affected by matrix porosity.
- Porous samples exhibit increased fragmentation and spallation tendencies compared to non-porous counterparts.
Conclusions:
- Matrix porosity is a critical factor affecting the plastic deformation and failure modes of SiC/AlSi12 composites.
- Peridynamics effectively models the impact behavior, highlighting the role of internal structure.
- Composite design must account for porosity to predict and mitigate fragmentation and spallation.
More Related Videos
Related Concept Videos
01:20Moments of Inertia for Composite Areas
977
Composite areas are structures with multiple basic shapes connected in some way. These shapes usually include rectangles, triangles, circles, and other basic shapes that are connected in such a way as to form a single structure. Calculating the second moment of area for a composite area is essential when trying to understand the structure's overall stiffness.
The second moment of area, also known as the moment of inertia, measures a structure's resistance to bending. It is calculated by...
The second moment of area, also known as the moment of inertia, measures a structure's resistance to bending. It is calculated by...
977
01:07Unsymmetric Loading of Thin-Walled Members: Problem Solving
90
The shear center of a channel section with uniform thickness, height, and width, is determined by computing the shear force in the member and calculating the moments of inertia of the sections.
To compute the shear forces, find the shear flow at a specific distance from the endpoint using the vertical shear and the moment of inertia values. The total shear force on the flange is calculated by integrating the shear flow from one end of the flange to the other.
Next, calculate the moments of...
To compute the shear forces, find the shear flow at a specific distance from the endpoint using the vertical shear and the moment of inertia values. The total shear force on the flange is calculated by integrating the shear flow from one end of the flange to the other.
Next, calculate the moments of...
90
01:19Impact Loading
181
Impact loading occurs when a moving object collides with a stationary structure, such as a rod with a uniform cross-sectional area fixed at one end. Under these conditions, the rod absorbs the kinetic energy from the striking object, leading to deformation and subsequent stress development. As the rod returns to its original position and reaches maximum stress, the absorbed energy, initially manifested as kinetic energy, transforms entirely into strain energy.
In cases of elastic deformation,...
In cases of elastic deformation,...
181
01:16Eccentric Axial Loading in a Plane of Symmetry
160
Eccentric axial loading occurs when an axial load is applied away from the centroidal axis of a structural member. This scenario is common in engineering, where structural elements may not be directly aligned due to various design or functional requirements.
160
01:15Thin-Walled Hollow Shafts
163
In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution...
163