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Related Concept Videos

Support Reactions01:30

Support Reactions

A coplanar force system refers to a set of forces that all lie in the same plane and are subject to different reactions between the point of contact and the supports. Understanding how different types of supports affect coplanar forces is crucial for designing safe and reliable structures that can withstand external loads.
The purpose of the supports is to prevent the translational motion of the system by applying an equal and opposite force and to prevent the system's rotation by applying a...
Internal Loadings in Structural Members: Problem Solving01:28

Internal Loadings in Structural Members: Problem Solving

When designing or analyzing a structural member, it is important to consider the internal loadings developed within the member. These internal loadings include normal force, shear force, and bending moment. Engineers can ensure that the structural member can support the applied external forces by calculating these internal loadings.
To illustrate this, let's consider a beam OC of 5 kN, inclined at an angle of 53.13° with the horizontal and supported at both ends. Determine the internal loadings...
Applications of Stress01:04

Applications of Stress

Consider a structure made of a boom and a rod designed to support a load. These two components are connected by a pin and stabilized by brackets and pins. The boom and the rod are detached from their supports to assess the different stresses imposed on this structure, and a free-body diagram is drawn. Then, all the forces applied, including the load acting on the structure, are identified. The reaction forces exerted on both the boom and the rod are computed using the equilibrium equations.
The...
Design Consideration01:22

Design Consideration

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 aspect...
Design of Prismatic Beams for Bending01:23

Design of Prismatic Beams for Bending

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 stress...
Stresses under Combined Loadings01:23

Stresses under Combined Loadings

When analyzing a bent tube with a circular cross-section subjected to multiple forces, it is crucial to determine the stress distribution in order to maintain structural integrity under varied load conditions.
The process begins by slicing the tube at critical points and analyzing the internal forces and stress components at these sections, focusing on the centroid. Normal stresses, generated by axial forces and bending moments, are either compressive or tensile and vary across the section from...

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Related Experiment Video

Updated: Jul 20, 2026

Training Persons with Spinal Cord Injury to Ambulate Using a Powered Exoskeleton
09:46

Training Persons with Spinal Cord Injury to Ambulate Using a Powered Exoskeleton

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Heuristic Evaluations of Back-Support, Shoulder-Support, Handgrip-Strength Support, and Sit-Stand-Support

Alejandra Martinez1, Laura Tovar1, Carla Irigoyen Amparan1

  • 1Physical, Information and Cognitive Human Factors Engineering Research Laboratory Industrial, Manufacturing and Systems Engineering Department, University of Texas at El Paso, El Paso, TX, USA.

IISE Transactions on Occupational Ergonomics and Human Factors
|March 14, 2025
PubMed
Summary

Occupational exoskeleton designs require significant improvements for equitable use by diverse workers, including those with disabilities. Current designs present barriers related to assembly, use, and cost, hindering industrial adoption.

Keywords:
Industrial exoskeletonsassemblydisassemblydoffingdonningheuristicsuniversal design principles

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Area of Science:

  • Human Factors Engineering
  • Rehabilitation Engineering
  • Occupational Safety and Health

Background:

  • Occupational exoskeletons offer potential benefits for worker support.
  • Universal design principles aim for equitable use across diverse populations.
  • Existing exoskeleton designs may not adequately accommodate all users.

Purpose of the Study:

  • To evaluate four occupational exoskeletons based on universal design principles.
  • To identify design limitations hindering equitable use by diverse worker groups.
  • To propose improvements for enhanced exoskeleton usability and industrial adoption.

Main Methods:

  • Evaluation of four occupational exoskeleton models.
  • Application of universal design principles as an assessment framework.
  • Analysis of user requirements related to strength, dexterity, reach, and balance.

Main Results:

  • Exoskeleton assembly, donning, doffing, and disassembly pose challenges for diverse users.
  • Workers with disabilities may need additional human assistance for exoskeleton use.
  • Design improvements for user feedback, error prevention, and recovery are needed.

Conclusions:

  • Current occupational exoskeleton designs require substantial improvements for equitable use.
  • Barriers to industrial adoption include space, training, assistance needs, and personalization costs.
  • Future exoskeleton development must prioritize universal design to ensure inclusivity and broader application.