Identification of design parameter variability of honeycomb sandwich beams from a study of limited available experimental dynamic structural response data

2015 ◽  
Vol 146 ◽  
pp. 197-213 ◽  
Author(s):  
Stijn Debruyne ◽  
Dirk Vandepitte ◽  
David Moens
Keyword(s):  
Design Parameter ◽  
Structural Response ◽  
Sandwich Beams ◽  
Response Data ◽  
Honeycomb Sandwich

An Introduction to the Impact Behaviour of Polymer Composites Using Simplified Beam Models

1998 ◽  
Vol 26 (2) ◽  
pp. 89-110 ◽  
Author(s):  
R. A. W. Mines
Keyword(s):  
Composite Materials ◽  
Undergraduate Students ◽  
Progressive Collapse ◽  
Structural Response ◽  
Sandwich Beams ◽  
Three Point Bending ◽  
The Past ◽  
Structural Case ◽  
The University ◽  
The Impact

The paper describes a final-year undergraduate course that has been taught at the University of Liverpool for the past three years. The main aims of the course are to introduce the student to the design of structures using multi-component (composite) materials and to the performance of such structures under impact loading. Given the complexity of generalized composite behaviour and of structural crashworthiness, a simple structural case is considered, namely, a beam subject to three-point bending. A feature of the course is that not only is linear structural response considered but also non-linear (progressive) structural collapse is covered. The course is split into four parts, namely: (i) analysis of composite laminae, (ii) analysis of laminated beams, (iii) local and global effects in sandwich beams, and (iv) post-failure and progressive collapse of sandwich beams. Static and impact loadings are considered. Comments are made on how the theories are simplified and communicated to the undergraduate students.

A New Approach to Elastodynamic Response of Cylindrical Shell Based on Generalized Solution Structure Theorem for Wave Equation

2010 ◽  
Author(s):  
Shugen Xu ◽  
Weiqiang Wang ◽  
Yan Liu
Keyword(s):  
Wave Equation ◽  
Solution Structure ◽  
Structure Theorem ◽  
Dynamic Pressure ◽  
Structural Response ◽  
Generalized Solution ◽  
New Approach ◽  
Response Data ◽  
Elastodynamic Response ◽  
Detailed Derivation

In this paper, a generalized solution structure theorem has been provided. It can be use to solve the wave equation about the structural response of cylinder under the dynamic pressure. This new approach also can be used to solve a batch of partial differential equations with the similar form. A detailed derivation process has been given to show how the solution is obtained. Finally, a practical example is presented, and all the elastodynamic response data at any point during dynamic pressure can be acquired conveniently.

scholarly journals Response of instrumented buildings under the 2016 Kaikoura earthquake

2017 ◽  
Vol 50 (2) ◽  
pp. 237-252 ◽  
Author(s):  
Reagan Chandramohan ◽  
Quincy Ma ◽  
Liam M. Wotherspoon ◽  
Brendon A. Bradley ◽  
Mostafa Nayyerloo ◽  
...  
Keyword(s):  
Structural Response ◽  
Strong Motion ◽  
Period Range ◽  
Motion Data ◽  
Response Data ◽  
Vibrational Characteristics ◽  
Modelling Techniques ◽  
S Period ◽  
Upper South ◽  
Kaikoura Earthquake

Six buildings in the Wellington region and the upper South Island, instrumented as part of the GeoNet Building Instrumentation Programme, recorded strong motion data during the 2016 Kaikoura earthquake. The response of two of these buildings: the Bank of New Zealand (BNZ) Harbour Quays, and Ministry of Business, Innovation, and Employment (MBIE) buildings, are examined in detail. Their acceleration and displacement response was reconstructed from the recorded data, and their vibrational characteristics were examined by computing their frequency response functions. The location of the BNZ building in the CentrePort region on the Wellington waterfront, which experienced significant ground motion amplification in the 1–2 s period range due to site effects, resulted in the imposition of especially large demands on the building. The computed response of the two buildings are compared to the intensity of ground motions they experienced and the structural and nonstructural damage they suffered, in an effort to motivate the use of structural response data in the validation of performance objectives of building codes, structural modelling techniques, and fragility functions. Finally, the nature of challenges typically encountered in the interpretation of structural response data are highlighted.

Non-Linear Stress-Strain Effects in the Flexural Wrinkling of Carbon Fibre Honeycomb Sandwich Beams

1982 ◽  
Vol 33 (1) ◽  
pp. 1-24 ◽  
Author(s):  
A.K. Ditcher ◽  
J.P.H. Webber
Keyword(s):  
Carbon Fibre ◽  
Sandwich Beam ◽  
Sandwich Beams ◽  
Stress Strain ◽  
Tangent Moduli ◽  
Honeycomb Sandwich ◽  
Non Linear ◽  
Theoretical Predictions ◽  
Failure Loads ◽  
Carbon Fibre Reinforced Plastic

SummaryA theoretical analysis of the flexural wrinkling of a honeycomb sandwich beam with laminated faces having non-linear stress-strain behaviour is presented. Appropriate tangent moduli are used in the constitutive equations for the compression face and a double iteration technique is used to calculate wrinkling loads. Numerical results are given for sandwich beams with unidirectional and cross-ply carbon fibre reinforced plastic (CFRP) faces. Experimental failure loads of sandwich beams are compared with theoretical predictions, and, in general, the agreement between the two is good.

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