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Related Concept Videos

Design of Transmission Shafts - Stress Analysis01:15

Design of Transmission Shafts - Stress Analysis

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Designing a transmission shaft requires a thorough understanding of the stresses induced by bending moments and torques, especially in systems where power is transferred through gears. These forces create force-couple systems at the centers of the shaft's cross-sections, leading to both transverse and torsional loading. Although shearing stresses from transverse loads are typically smaller than those from torques and are often overlooked, the significant normal stresses from these loads...
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Bearing Stress01:22

Bearing Stress

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Bearing stress refers to the contact pressure between two separate bodies. To visualize this, imagine a bolt thrust through a plate. The bolt applies a force to the plate, which exerts an equal but opposite force back onto the bolt. This force isn't just a singular entity but a compilation of numerous smaller forces distributed across the contact surface between the bolt and the plate.
Due to the intricacy of these microforces, an average value, known as bearing stress, is often used by...
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Stress Concentrations in Circular Shafts01:18

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Consider the elastic torsion formula, which applies to a circular shaft with a consistent cross-section. This formula assumes that the shaft's ends are loaded with rigid plates firmly attached. However, in many cases, torques are applied to the shaft through mechanisms like flange couplings or gears, which are connected by keys inserted into keyways. This application method modifies the stress distribution near the point of torque application, causing it to deviate from the distributions...
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Design of Transmission Shafts01:16

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The design of a transmission shaft is governed by two primary specifications: the power it transmits and its rotational speed. These parameters guide the selection of the shaft's material and cross-sectional dimensions, ensuring that the material's maximum shearing stress remains within the elastic limit while transmitting the desired power at the given speed. The system's power is intrinsically linked to the applied torque. The torque applied to the shaft can be calculated by...
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Transmission Shafts: Problem Solving01:09

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Designing a solid shaft that transmits power from a motor to a machine tool involves a series of calculations to ensure the shaft can withstand the stresses applied by bending moments and torques. First, calculate the torque exerted on the gear, considering the power transmitted by the shaft and its rotational speed. Following this, compute the tangential forces acting on the gears, which directly relate to the torque and the gear radius.
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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...
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Stress-Based Lattice Structure Design for a Motorbike Application.

Patrich Ferretti1, Elena Fusari1, Giulia Alessandri1

  • 1Department of Industrial Engineering, University of Bologna, Bologna, Italy, 40136, Italy.

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Summary
This summary is machine-generated.

This study optimized motorcycle throttle control cams using additive manufacturing and lattice structures. The resulting lightweight, ergonomic component is cheaper and improves engine response.

Keywords:
CAD/CAMDesign for additive manufacturingMSLAShape optimizationStereolithography toolinglattice structurenTopologywater washable resin

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Area of Science:

  • Mechanical Engineering
  • Additive Manufacturing
  • Ergonomics

Background:

  • Modern motorcycles often use a cable-actuated throttle with a cam mechanism.
  • The cam's shape influences throttle response and rider ergonomics.
  • Rider wrist mobility can limit throttle control effectiveness.

Purpose of the Study:

  • To design a customized throttle cam for improved engine response and rider ergonomics.
  • To leverage additive manufacturing and lattice structures for component optimization.

Main Methods:

  • Utilized FEA software for design and lattice structures for weight reduction.
  • Employed MSLA (Masked Stereolithography) 3D printing technology for fabrication.
  • Conducted dimensional inspection for quality assurance prior to assembly.

Main Results:

  • Successfully manufactured a lightweight and cost-effective throttle cam.
  • Achieved a component lighter and cheaper than the original.
  • Validated the design through dimensional inspection.

Conclusions:

  • Developed an innovative, lightweight, and ergonomic mechanical component for motorcycle throttle control.
  • Demonstrated the efficacy of lattice structures in optimizing component weight while maintaining compliance.
  • Highlighted the potential of additive manufacturing for creating customized and efficient motorcycle parts.