scholarly journals Fiber Composite Structural Durability and Damage Tolerance: Simplified Predictive Methods

2008 ◽  
pp. 338-338-18 ◽  
Author(s):  
CC Chamis ◽  
CA Ginty
Keyword(s):  
Damage Tolerance ◽  
Fiber Composite ◽  
Structural Durability ◽  
Predictive Methods

Durability and Damage Tolerance Assessment of the TF34-100 Engine

1986 ◽  
Author(s):  
Jon S. Ogg ◽  
Ronald R. Reinhold
Keyword(s):  
Air Force ◽  
Damage Tolerance ◽  
Flight Safety ◽  
Weapon System ◽  
General Electric ◽  
Structural Assessment ◽  
Structural Durability ◽  
Inspection Systems ◽  
Useful Life ◽  
Maintenance Plan

The critical nature of the TF34-100 engine to the Air Force’s A-10 Close Air Support weapon system made it important to obtain the best possible visibility of the engine’s future structural maintenance needs and component life limits. Accordingly, an in-depth structural durability and damage tolerance assessment was performed on this engine by a joint Air Force/General Electric team. Results of the assessment team’s unprecedented analysis efforts culminated in a comprehensive Structural Maintenance Plan that identified both current and future maintenance actions necessary for insuring maximum flight safety. The plan entailed component inspection and replacement intervals, inspection systems, preferred modifications/reworks, and a life growth plan for extending the useful life of the TF34-100 upwards to 8000 A-10 mission hours. This paper details the nature and extent of effort undertaken in conducting the 18 month structural assessment.

scholarly journals Non-destructive Inspection of Composite Aileron during Fatigue Test

2021 ◽  
Vol 349 ◽  
pp. 03016
Author(s):  
Michal Podstawka ◽  
Vladimír Snop ◽  
Petr Bělský ◽  
Kristýna Kutiová
Keyword(s):  
Phased Array ◽  
Damage Tolerance ◽  
Impact Damage ◽  
Aircraft Design ◽  
Fatigue Tests ◽  
Structural Part ◽  
Certification Tests ◽  
Structural Durability ◽  
Safety And Reliability ◽  
Non Destructive

The operational safety and reliability of an airplane must be an integral part of its design. The use of suitable materials that pass material certification tests is very important for a new aircraft design. The next part is testing specific samples, sub-components, and components such as the aileron. The paper deals with a non-destructive evaluation of composite primary structural part fatigue tests in accordance with damage tolerance philosophy considering impact damage presence. NDT methods such as visual, eddy current, and ultrasonic testing included phased array technique, are used for the inspections. A schedule of inspections was created, and structural durability was verified.

High Temperature Intermetallic Composites

1988 ◽  
Vol 120 ◽  
Author(s):  
D. L. Anton
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Damage Tolerance ◽  
Fiber Composite ◽  
Transient Liquid Phase ◽  
Plastic Response ◽  
Glass Composites ◽  
Aerospace Applications ◽  
Reinforcing Fiber ◽  
Thermal Stability Of

AbstractMany intermetallic compounds possess properties which make them excellent candidates for high temperature use in advanced gas turbine and aerospace applications. One method proposed for increasing damage tolerance in these brittle materials is to artificially composite them with high temperature fibers as utilized in both ceramic and glass composites. Fabrication of these composites is a formidable problem. One method of fabricating these structures, termed here Transient Liquid Phase Consolidation, TLPC, is demonstrated for a number of intermetallic/reinforcing fiber combinations. Thermal stability of the fibers in the intermetallic matrices was observed with FP Alumina being the most stable. Ambient temperature tensile property evaluations were made on monolithic, chopped and aligned FP fiber reinforced Al3 Ta with the aligned structure having the highest ultimate strength and the chopped fiber composite the greatest pseudo plastic response.

Defect/damage tolerance of pressurized fiber composite shells

2001 ◽  
Vol 51 (2) ◽  
pp. 159-168 ◽  
Author(s):  
Christos C Chamis ◽  
Levon Minnetyan
Keyword(s):  
Damage Tolerance ◽  
Fiber Composite ◽  
Composite Shells

Cytocompatibility of Carbon Nanofiber Materials for Neural Applications

2003 ◽  
Vol 774 ◽  
Author(s):  
Janice L. McKenzie ◽  
Michael C. Waid ◽  
Riyi Shi ◽  
Thomas J. Webster
Keyword(s):  
Carbon Fiber ◽  
Surface Energy ◽  
Carbon Nanofibers ◽  
Carbon Fibers ◽  
Carbon Nanofiber ◽  
Fiber Composite ◽  
Scar Tissue ◽  
Pc 12 Cells ◽  
Low Surface Energy ◽  
Poly Carbonate

AbstractSince the cytocompatibility of carbon nanofibers with respect to neural applications remains largely uninvestigated, the objective of the present in vitro study was to determine cytocompatibility properties of formulations containing carbon nanofibers. Carbon fiber substrates were prepared from four different types of carbon fibers, two with nanoscale diameters (nanophase, or less than or equal to 100 nm) and two with conventional diameters (or greater than 200 nm). Within these two categories, both a high and a low surface energy fiber were investigated and tested. Astrocytes (glial scar tissue-forming cells) and pheochromocytoma cells (PC-12; neuronal-like cells) were seeded separately onto the substrates. Results provided the first evidence that astrocytes preferentially adhered on the carbon fiber that had the largest diameter and the lowest surface energy. PC-12 cells exhibited the most neurites on the carbon fiber with nanodimensions and low surface energy. These results may indicate that PC-12 cells prefer nanoscale carbon fibers while astrocytes prefer conventional scale fibers. A composite was formed from poly-carbonate urethane and the 60 nm carbon fiber. Composite substrates were thus formed using different weight percentages of this fiber in the polymer matrix. Increased astrocyte adherence and PC-12 neurite density corresponded to decreasing amounts of the carbon nanofibers in the poly-carbonate urethane matrices. Controlling carbon fiber diameter may be an approach for increasing implant contact with neurons and decreasing scar tissue formation.

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