DESIGN OF LIGHTWEIGHT STRUCTURES BY REINFORCING THIN-WALLED CYLINDERS

Ruoyu Sun, Nilesh Mankame, Girish Krishnan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

There is an enduring need for structures that are strong, stiff, and lightweight. In this work, we explore a rational approach to the design of such structures by building on the work of Wegst and Ashby [1]. Wegst and Ashby proposed partitioning the design space of thin-walled cylinders subject to pure bending loads based on the dominant failure mode to guide the selection of circular cross section shapes that maximize strength per unit mass. We extend this work by using the same framework to guide the selection of discrete internal reinforcements for these tubes. The partitioned design space, referred to as the Failure Mode Space (FMS), is generated for a given base tube using finite element analysis. Each branch of the failure envelope in the FMS is associated with a unique failure mode. We investigate three different reinforcement strategies: a) structural foam lining, b) a longitudinal rib and c) a ring stiffener to improve the mass-specific strength of a given base tube. Mass equivalence between the reinforced and un-reinforced tubes is used to project the reinforced tubes onto the FMS generated for the un-reinforced tubes. FE analysis of the reinforced tubes reveals that different reinforcement strategies behave differently in different partitions of the FMS based on the associated failure modes. The approach demonstrated in this preliminary study can be extended to more complex structures under generalized loading conditions.

Original languageEnglish (US)
Title of host publication50th Design Automation Conference (DAC)
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791888377
DOIs
StatePublished - 2024
Externally publishedYes
EventASME 2024 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC-CIE 2024 - Washington, United States
Duration: Aug 25 2024Aug 28 2024

Publication series

NameProceedings of the ASME Design Engineering Technical Conference
Volume3B-2024

Conference

ConferenceASME 2024 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC-CIE 2024
Country/TerritoryUnited States
CityWashington
Period8/25/248/28/24

ASJC Scopus subject areas

  • Mechanical Engineering
  • Computer Graphics and Computer-Aided Design
  • Computer Science Applications
  • Modeling and Simulation

Fingerprint

Dive into the research topics of 'DESIGN OF LIGHTWEIGHT STRUCTURES BY REINFORCING THIN-WALLED CYLINDERS'. Together they form a unique fingerprint.

Cite this