Author: Publisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 24
Book Description
Probabilistic Simulation of Long Term Behavior in Polymer Matrix Composites
Author: Cyclic Load Effects on Long Term Behavior of Polymer Matrix Composites
Author: A. R. ShahPublisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 16
Book Description
Probabilistic Simulation of Long Term Behavior in Polymer Matrix Composites
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781722602734
Category :
Languages : en
Pages : 24
Book Description
A methodology to compute cumulative probability distribution functions (CDF) of fatigue life for different ratios, r of applied stress to the laminate strength based on first ply failure criteria has been developed and demonstrated. Degradation effects due to long term environmental exposure and mechanical cyclic loads are considered in the simulation process. A unified time-stress dependent multi-factor interaction equation model developed at NASA Lewis Research Center has been used to account for the degradation/aging of material properties due to cyclic loads. Fast probability integration method is used to perform probabilistic simulation of uncertainties. Sensitivity of fatigue life reliability to uncertainties in the primitive random variables are computed and their significance in the reliability based design for maximum life is discussed. The results show that the graphite/epoxy (0/+45/90) deg laminate with ply thickness 0.125 in. has 500,000 cycles life for applied stress to laminate strength ratio of 0.6 and a reliability of 0.999. Also, the fatigue life reliability has been found to be most sensitive to the ply thickness and matrix tensile strength. Tighter quality controls must therefore be enforced on ply thickness and matrix strength in order to achieve high reliability of the structure. Shah, A. R. and Singhal, S. N. and Murthy, P. L. N. and Chamis, C. C. Glenn Research Center NAS3-27186; RTOP 505-62-10...
Scientific and Technical Aerospace Reports
Author: Scientific and Technical Aerospace Reports
Author: Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 610
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Effect of Cyclic Thermo-Mechanical Loads on Fatigue Reliability in Polymer Matrix Composites
Author: A. R. ShahPublisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 20
Book Description
NASA Technical Memorandum
Author: 35th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
Author: International Aerospace Abstracts
Author: Rehabilitation of Pipelines Using Fiber-reinforced Polymer (FRP) Composites
Author: Vistasp M. KarbhariPublisher: Elsevier
ISBN: 0857096923
Category : Technology & Engineering
Languages : en
Pages : 311
Book Description
Rehabilitation of Pipelines Using Fibre-reinforced Polymer (FRP) Composites presents information on this critical component of industrial and civil infrastructures, also exploring the particular challenges that exist in the monitor and repair of pipeline systems. This book reviews key issues and techniques in this important area, including general issues such as the range of techniques using FRP composites and how they compare with the use of steel sleeves. In addition, the book discusses particular techniques, such as sleeve repair, patching, and overwrap systems. - Reviews key issues and techniques in the use of fiber reinforced polymer (FRP) composites as a flexible and cost-effective means to repair aging, corroded, or damaged pipelines - Examines general issues, including the range of techniques using FRP composites and how they compare with the use of steel sleeves - Discusses particular techniques such as sleeve repair, patching, and overwrap systems