Statics and Mechanics of Structures

Analysis of structures will in general involve large and complex numerical models, which require extensive computation efforts. These models are frequently referred to as digital twins. This analysis becomes particularly cumbersome for cases where a large number of response calculations are repeatedly performed, such as in the case of Monte Carlo simulation. One way of avoiding this will be to introduce simplified numerical models, which are no longer twins but some kind of more distant numerical relative. As an example of such a simplified numerical representation, a so-called response surface model can be applied in order to overcome the excessive computational efforts. Such models are also sometimes referred to as meta-models or cyber-physical models. One possible approach is to use a response surface model based on first-or second-order polynomials as approximating functions, with the function parameters being determined based on multivariate regression analysis techniques. In this chapter, various types of approximate models are first discussed in connection with a simplistic example. The application of response surface techniques is subsequently illustrated for a quite complex physicsbased structural model for an offshore jacket structure in combination with Monte Carlo simulation techniques.

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“…This highly nonlinear expression in Eq. (3) can be closely approximated by a third order polynomial as follows, [1]:…”

Section: Numerical Representations Of Physical Structures 21 the (Nementioning

confidence: 99%

Utilization of Digital Twins and Other Numerical Relatives for Efficient Monte Carlo Simulation in Structural Analysis

Leira¹,

Agusta²,

Thöns³

2019

Theory, Application, and Implementation of Monte Carlo Method in Science and Technology

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“…Obviously, not every gap between tubes can be braced. The designer must take into consideration that the chassis has enough space for the driver and for the mechanical and electrical parts [3,8,38].…”

Section: Design For Space Frame Truss Structuresmentioning

confidence: 99%

Lightweight Design and Welding Manufacturing of a Hydrogen Fuel Cell Powered Car’s Chassis

et al. 2018

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The development of the chassis for the hydrogen fuel cell powered car has been involved in the designing and manufacturing aspects, while taking into consideration the mass, strength, stiffness, centre of gravity (COG), and manufacturing cost requirements. Towards this direction, a chassis design is proposed employing a space frame structure and constructed by an aluminium alloy with great strength. The structural design has been derived through the lightweight engineering approaches in conjunction with the part consolidation, Design for Assembly (DFA) and Design for Manufacture methods. Moreover, it has been performed in compliance with the safety regulations of the Shell Eco Marathon racing competition. The material's principal characteristics are the great strength, the low mass, as well as the great workability, machinability, and weldability. Following the national and global environmental issues, the recyclable characteristics of the aluminium alloy are an extra asset. Furthermore, the existence of aluminium alloy manufacturers around the fabricating area provides low cost supply and fast delivery benefits. The integration of the fuel cell powered vehicle is obtained through the designing and the manufacturing processes of the chassis and the parts fitted on the chassis. The manufacturing procedures are described thoroughly; mainly consisting of the cutting and welding processes and the assembling of the parts that are fitted on the chassis. Additionally, the proper welding parameters for the custom chassis design are investigated and are selected after deductive reasoning. The quality control of the weld joints is conducted by non-destructive methods (NDT) ensuring the required structural properties of the welds. A combination of the selected material, the specific type of the chassis, and the manufacturing processes lead to construction simplicity in a low manufacturing cost by using the existing laboratory equipment. Furthermore, the designing and manufacturing parameters lead to a stiff with a low centre of gravity, and the most lightweight chassis of the urban concept category at the Shell Eco Marathon race.

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“…Before the advent of computers, the response of a truss could be predicted by applying the assumption that the structure is formed of two-force members that only carry axial loads [1]. The advent of modern computers led to the development of matrix methods which do not require such assumptions to reduce computational expense.…”

Section: Introductionmentioning

confidence: 99%

WrapToR composite truss structures: Measurement and modelling of mechanical response

Hunt

Zhao

Wisnom

et al. 2020

Composite Structures

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Wrapped Tow Reinforced (WrapToR) trusses are ultra-efficient structures that are produced from composite materials using a novel winding process. In this study, a structural model based on the stiffness method is developed for the novel truss configuration to predict the pre-failure mechanical response. To validate the model, the mechanical response of the structures is experimentally investigated to a high level of detail using a series of three-point bend tests. Results of the tests highlight the importance of modelling behaviour of the truss joints due to both internal joint deformations and their effect on load transfer between members. The results also show that the developed model can predict deflections and strains to a reasonable accuracy across a range of truss configurations.

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Statics and Mechanics of Structures

Abstract: The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use.

Cited by 16 publications

References 9 publications

Utilization of Digital Twins and Other Numerical Relatives for Efficient Monte Carlo Simulation in Structural Analysis

Utilization of Digital Twins and Other Numerical Relatives for Efficient Monte Carlo Simulation in Structural Analysis

Lightweight Design and Welding Manufacturing of a Hydrogen Fuel Cell Powered Car’s Chassis

WrapToR composite truss structures: Measurement and modelling of mechanical response

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