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Related Concept Videos

Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity01:15

Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity

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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.
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Strain-Energy Density01:20

Strain-Energy Density

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Understanding the strain energy density in materials under axial load is crucial for evaluating their mechanical behavior and durability. When a rod is subjected to such a load, it elongates and stores energy, known as strain energy, as potential energy within the material. This energy is measured in terms of energy per unit volume.
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Plastic Deformations01:19

Plastic Deformations

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Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their...
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Plastic Behavior01:21

Plastic Behavior

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A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
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Design of Prismatic Beams for Bending01:23

Design of Prismatic Beams for Bending

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The design of prismatic beams, structural elements with a uniform cross-section, focuses on ensuring safety and structural integrity under load. The design process begins by determining the allowable stress, either from material properties tables, or by dividing the material's ultimate strength by a safety factor. This safety factor is essential for accommodating uncertainties, and varies depending on the material—timber, steel, or concrete—with each having unique strength and...
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Bending of Members Made of Several Materials

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In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
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Biomimetic Lattice Structures Design and Manufacturing for High Stress, Deformation, and Energy Absorption

Víctor Tuninetti1, Sunny Narayan2, Ignacio Ríos3

  • 1Department of Mechanical Engineering, Universidad de La Frontera, Temuco 4811230, Chile.

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Summary

This review explores advancements in lattice structures, focusing on their mechanical behavior, optimization, and applications in aerospace and biomedical engineering. It highlights future directions for enhanced performance, scalability, and industrial use.

Keywords:
additive manufacturingbiomimetic materialscomputational modelingenergy absorptionhierarchical latticeslattice structuresmechanical optimizationmulti-scale experimental validationsmart materialstopology optimization

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Biomedical Engineering

Background:

  • Lattice structures offer exceptional strength-to-weight ratios and energy absorption.
  • They have diverse applications in aerospace, biomedical, and mechanical design.

Purpose of the Study:

  • To systematically review recent advancements in lattice structures.
  • To analyze their classification, mechanical behavior, and optimization.
  • To identify research gaps and future directions.

Main Methods:

  • Critical analysis of stress distribution, deformation, and energy absorption.
  • Examination of computational modeling challenges and manufacturing defects.
  • Review of hybrid additive manufacturing, hierarchical structures, and smart materials.

Main Results:

  • Progress in hybrid additive manufacturing and hierarchical lattice structures.
  • Potential of smart adaptive materials for self-healing and monitoring.
  • Identification of challenges in computational modeling and manufacturing defects.

Conclusions:

  • Need for improved AI-driven predictive models and scalable manufacturing.
  • Importance of multi-functional lattice systems (thermal, acoustic, impact resistance).
  • Future research should focus on cost-effective materials, sustainability, and multi-scale validation.