A new composite energy absorbing system for aircraft and helicopter

Taher, Siavash Talebi; Mahdi, E.; Mokhtar, A. S.; Magid, D.L.; Fakhru’l‐Razi, A.; Arora, Prithvi Raj

doi:10.1016/j.compstruct.2006.04.083

Cited by 34 publications

(15 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Composite absorbers align well with crashworthiness characteristics with outstanding performance compared to metallic structures [3][4]. Composite absorbers provide progressive crushing behaviour and are rapidly increasing due to higher energy absorption capacity per unit weight in comparison with metals; this means higher Specific Energy Absorption (SEA) levels that surpass achievable levels in metals [5][6].…”

Section: Introductionmentioning

confidence: 87%

Lightweight design to improve crushing behaviour of multi-stitched composite tubular structures under impact loading

Rabiee

Ghasemnejad

2019

Thin-Walled Structures

View full text Add to dashboard Cite

This paper presents experimental and numerical studies on the effect of multi-stitching pattern on the energy absorption capability of composite tubular structures under impact loading. A new multi-stitching pattern was developed to study the increase of specific energy absorption capabilities in GFRP and CFRP crash absorbers. The stitching pattern on both specimens showed a significant increase in energy absorption capability under impact loading. According to our results, the specific energy absorption of GFRP and CFRP composite tubes are 17% and 18% higher than non-stitched specimens respectively. A multi-shell finite element model was constructed to predict the axial crushing behaviour and energy absorption capability of composite structures under impact loading. The method is based on an energy-based contact card modelling technique in the stitched and non-stitched area, and the initiation of main central crack growth occurs when the critical separation (PARAM function) is attained, and this represents the functionality of the stitched area during an impact event. The developed numerical approach is efficient in terms of accuracy and simplicity in comparison with the existing methods for multi-layered composites structures.

show abstract

Section: Introductionmentioning

confidence: 87%

Lightweight design to improve crushing behaviour of multi-stitched composite tubular structures under impact loading

Rabiee

Ghasemnejad

2019

Thin-Walled Structures

View full text Add to dashboard Cite

show abstract

“…Based on the crimping crack model, Taher et al purposed a new composite absorbing system for the sub-structure of helicopter. To enhance its energy absorption efficiency, the composite web is adopted (18) . Using transverse failure mode, cylinder shell was arranged under the cabin floor indicated in Fig.…”

Section: Energy Absorption Structure In Aircraft Crashworthiness Designmentioning

confidence: 99%

Energy absorption structures design of civil aircraft to improve crashworthiness

Ren¹,

Xiang²

2014

Aeronaut. j. (1968)

View full text Add to dashboard Cite

To improve the crashworthiness of civil aircraft, the design concept of energy absorption structure for civil aircraft is investigated. Two typical different design principles could be identified. The first category includes Helicopter and Light fixed-wing Aircraft (HLA), and Transport, Mid-size and Commuter type Aircraft (TMCA) are classified into the second group. Frame, strut and bottom structure are the three kinds of energy absorption structure for TMCA. The strut layout of conventional civil aircraft is studied and some energy absorption devices are adopted. High efficiency energy absorption structures such as the foam and sine-wave beam are employed as the bottom structure for both of HLA and LMCA. The finite element method is used to analyse and design energy absorption structure in aircraft crashworthiness problem. Results show that the crashworthiness of civil aircraft could be largely improved by using proper strut layout and excellent energy absorption device. The stiffness combination of frame and strut should be considered to get better global aircraft deformation. Supporting platform and failure model are the two core problems of bottom energy absorption structure design. Foam and sine-wave beam under the lifted frame could improve the crashworthiness of civil aircraft.

show abstract

“…Other solutions previously published consider different frame constructions, such as honeycomb and sinewave beams [20], or through the use of triggered composite materials, or specially designed frames that can guide the direction of collapse [21].…”

Section: Introductionmentioning

confidence: 99%

Experimental observations of an 8 m/s drop test of a metallic helicopter underfloor structure onto a hard surface: Part 1

Hughes

Vignjević

Campbell

2007

Proceedings of the Institution of Mechanical Engineers, Part G:

View full text Add to dashboard Cite

This is the first part of a two-part paper that describes the experimental observations for two similar sections of floor that were dropped onto both hard and water surfaces at 8 m/s, as a part of one experimental campaign. The current paper provides an assessment of a simple box-beam underfloor structure typically found in metallic helicopters and provides an overview of the failure modes and the collapse mechanism observed when dropped onto a hard surface. All findings are supported by quantitative measurements and extensive photographic evidence.The current paper identifies two limitations with the existing design, which are based upon the observations of the failure modes for different frame types and the performance of the intersection joints. In order to increase the level of crashworthiness currently offered, significant frame and joint redesign is required in order to provide a more progressive collapse. The simple buckling modes currently observed should be avoided, as the existing stroke is not fully utilized in the event of a crash, resulting in an inefficient structure. The current paper also discusses the sensitivity to impact angle, as slight variations from a normal impact may result in a detrimental response. Experimental observations of an 8 m/s drop test of a metallic helicopter underfloor structure: part 1 675 Fig. 19 Experimental acceleration-time histories for A1 through A7 JAERO214

show abstract

A new composite energy absorbing system for aircraft and helicopter

Cited by 34 publications

References 2 publications

Lightweight design to improve crushing behaviour of multi-stitched composite tubular structures under impact loading

Lightweight design to improve crushing behaviour of multi-stitched composite tubular structures under impact loading

Energy absorption structures design of civil aircraft to improve crashworthiness

Experimental observations of an 8 m/s drop test of a metallic helicopter underfloor structure onto a hard surface: Part 1

Contact Info

Product

Resources

About