scholarly journals Probabilistic Approach to Damage Tolerance Design of Aircraft Composite Structures

2007 ◽  
Vol 44 (4) ◽  
pp. 1309-1317 ◽  
Author(s):  
Kuen Y. Lin ◽  
Andrey V. Styuart
Keyword(s):  
Composite Structures ◽  
Damage Tolerance ◽  
Probabilistic Approach ◽  
Tolerance Design

The Probabilistic Compliance Methodology for Damage Tolerance Design of Thicker Composite Structure

2011 ◽  
Vol 239-242 ◽  
pp. 872-875
Author(s):  
Tian Chun Zou ◽  
Peng Hao ◽  
Jia Rui Zhang ◽  
Zhen Yu Feng
Keyword(s):  
Impact Energy ◽  
Composite Structure ◽  
Composite Laminates ◽  
Composite Structures ◽  
Damage Tolerance ◽  
Impact Damage ◽  
Tolerance Design ◽  
Research Results ◽  
Certification Requirements

In this paper, the probabilistic compliance methodology for damage tolerance design of thicker composite structures were investigated, and the research results show that for the composite laminates withstanding impact energy below 90J, if it cannot produce barely visible impact damage (BVID), then using the probabilistic methodology can meet certification requirements of damage tolerance.

scholarly journals Damage tolerance design of transport aircraft

2021 ◽  
Vol 1091 (1) ◽  
pp. 012065
Author(s):  
H Vishnu ◽  
R Ajith Kumar ◽  
R Sujith ◽  
R Suraj ◽  
K E Girish
Keyword(s):  
Damage Tolerance ◽  
Tolerance Design ◽  
Transport Aircraft

Integrally-Stiffened Composite Damage Tolerance Evaluated by Computational Simulation

2001 ◽  
Author(s):  
Christos C. Chamis ◽  
Levon Minnetyan
Keyword(s):  
Material Properties ◽  
Composite Structures ◽  
Failure Modes ◽  
Damage Tolerance ◽  
Epoxy Composite ◽  
Computational Simulation ◽  
Computer Code ◽  
Simulation Design ◽  
Damage Initiation ◽  
Composite Damage

Abstract An integrally stiffened graphite/epoxy composite rotorcraft structure is evaluated via computational simulation. A computer code that scales up constituent micromechanics level material properties to the structure level and accounts for all possible failure modes is used for the simulation of composite degradation under loading. Damage initiation, growth, accumulation, and propagation to fracture are included in the simulation. Design implications with regard to defect and damage tolerance of integrally stiffened composite structures are examined. A procedure is outlined regarding the use of this type of information for setting quality acceptance criteria, design allowables, damage tolerance, and retirement-for-cause criteria.

A probabilistic approach for design and certification of self-healing advanced composite structures

2011 ◽  
Vol 225 (4) ◽  
pp. 435-449 ◽  
Author(s):  
H R Williams ◽  
R S Trask ◽  
I P Bond
Keyword(s):  
Composite Structures ◽  
High Performance ◽  
Probabilistic Approach ◽  
Healing Time ◽  
Self Healing ◽  
Structural Failure ◽  
Healing System ◽  
Order Of Magnitude ◽  
Damage Tolerant

Design and certification of novel self-healing aerospace structures was explored by reviewing the suitability of conventional deterministic certification approaches. A sandwich structure with a vascular network self-healing system was used as a case study. A novel probabilistic approach using a Monte Carlo method to generate an overall probability of structural failure yields notable new insights into design of self-healing systems, including a drive for a faster healing time of less than two flight hours. In the case study considered, a mature self-healing system could be expected to reduce the probability of structural failure (compared to a conventional damage-tolerant construction) by almost an order of magnitude. In a risk-based framework this could be traded against simplified maintenance activity (to save cost) and/or increased allowable stress (to allow a lighter structure). The first estimate of the increase in design allowable stresses permitted by a self-healing system is around 8 per cent, with a self-healing system much lighter than previously envisaged. It is thought these methods and conclusions could have wider application to self-healing and conventional high-performance composite structures.

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