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Related Concept Videos

Design Consideration01:22

Design Consideration

452
Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key...
452
Fatigue01:21

Fatigue

645
Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
645
Yield Criteria for Ductile Materials under Plane Stress01:25

Yield Criteria for Ductile Materials under Plane Stress

366
In designing structural elements and machine parts using ductile materials, it is crucial to ensure that these components withstand applied stresses without yielding. Yielding is initially determined through a tensile test, which evaluates the material's response to uniaxial stress. However, tensile stress is insufficient when components face biaxial or plane stress conditions This condition requires advanced criteria to predict failure.
The Maximum Shearing Stress Criterion, also known as...
366
Bending of Members Made of Several Materials01:11

Bending of Members Made of Several Materials

479
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.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...
479
Composite Bodies00:55

Composite Bodies

1.3K
A composite body is a body made up of multiple parts, connected to form a larger, unified object. Each part has its own weight and center of gravity, which must be considered to determine the center of gravity of the composite body. In cases where the density or specific weight is constant, the center of gravity coincides with the centroid.
Composite bodies have widespread applications in mechanical engineering, from automobiles to aircraft to rockets. For example, an automobile wheel comprises...
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Principal Stresses: Problem Solving01:15

Principal Stresses: Problem Solving

435
When analyzing two planes intersecting at right angles under the influence of shearing, tensile, and compressive stresses, it is essential to identify principal planes, maximum shearing stress, and principal stresses. To find the principal planes, apply a formula that equates them to twice the shearing stress divided by the difference between tensile and compressive stresses.
435

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Structural Design and Manufacturing of a Cruiser Class Solar Vehicle
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Predicting Composite Component Behavior Using Element Level Crashworthiness Tests, Finite Element Analysis and

Ravin Garg1, Iman Babaei1, Davide Salvatore Paolino1

  • 1Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy.

Materials (Basel, Switzerland)
|October 14, 2020
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Summary
This summary is machine-generated.

This study developed a method to accurately predict damage in fiber-reinforced plastic car parts using impact test data. This accelerates the creation of lighter, safer vehicles with composite materials.

Keywords:
automated parametric identificationcomposite materialscrashworthinessfinite element analysisimpact behavior prediction

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Automotive Engineering

Background:

  • Fiber-reinforced plastics offer superior mechanical properties over metals for automotive components.
  • Underutilization of composites in primary crash structures stems from a lack of standardized damage prediction methodologies.
  • Current methods for composite crash structure development are time-consuming and costly compared to metallic counterparts.

Purpose of the Study:

  • To present a methodology for tuning material cards in Radioss using crashworthiness data from impact tests on carbon-fiber reinforced epoxy plates.
  • To validate a virtual material model by comparing simulated and experimental crash box behavior.
  • To enhance the efficiency, automation, and economy of composite crash structure development.

Main Methods:

  • Conducting in-plane impact tests on carbon-fiber reinforced epoxy flat plates.
  • Utilizing global and adaptive response search methods to tune material cards in Radioss.
  • Validating the virtual material model against experimental data from Formula SAE crash box impacts.

Main Results:

  • Successful tuning of the material card in Radioss using parametric identification techniques.
  • Validation of the virtual material model through comparison with experimental crash box crushing behavior.
  • Demonstrated significant reduction in development time and cost for composite crash structures.

Conclusions:

  • The presented methodology enables efficient and automated development of composite crash structures.
  • The predictive capability of the virtual material model reduces the need for extensive component-level testing.
  • This approach promotes the use of lighter, safer composite materials in vehicles, reducing emissions.