Long Term Isothermal Aging Effects On Carbon Fabric Reinforced Pmr 15 Composites Compression Strength
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Long Term Isothermal Aging Effects on Carbon Fabric Reinforced PMR 15 Composites Compression Strength
Author | : Kenneth J. Bowles |
Publsiher | : Unknown |
Total Pages | : 20 |
Release | : 1996 |
Genre | : Electronic Book |
ISBN | : NASA:31769000612161 |
Download Long Term Isothermal Aging Effects on Carbon Fabric Reinforced PMR 15 Composites Compression Strength Book in PDF, Epub and Kindle
A study was conducted to determine the effects of long-term isothermal thermo-oxidative aging on the compressive properties of T-650-35 fabric reinforced PMR-15 composites. The temperatures that were studied were 204, 260, 288, 316, and 343 C. Specimens of different geometries were evaluated. Cut edge-to-surface ratios of 0.03 to 0.89 were fabricated and aged. Aging times extended to a period in excess of 15,000 hours for the lower temperature runs. The unaged and aged specimens were tested in compression in accordance with ASTM D-695. Both thin and thick (plasma) specimens were tested. Three specimens were tested at each time/temperature/geometry condition. The failure modes appeared to be initiated by fiber kinking with longitudinal, interlaminar splitting. In general, it appears that the thermo-oxidative degradation of the compression strength of the composite material may occur by both thermal (time-dependent) and oxidative (weight-loss) mechanisms. Both mechanisms appear to be specimen-thickness dependent.
Long Term Isothermal Aging Effects on Weight Loss Compression Properties and Dimensions of T650 35 Fabric Reinforced Pmr 15 Composites Data
Author | : National Aeronautics and Space Administration (NASA) |
Publsiher | : Createspace Independent Publishing Platform |
Total Pages | : 64 |
Release | : 2018-06 |
Genre | : Electronic Book |
ISBN | : 1720615160 |
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A cooperative program was conducted with the General Electric Aircraft Engines plant in Evendale, Ohio, to study the effects of long-term isothermal aging at elevated temperatures on compression and thermal durability properties of T650 35 fabric-reinforced PMR 15 composites. This degradation study was conducted over an approximate time period of 3 1/2 yr. The aging temperatures were 204, 260, 288, 316, and 343 C. Specimens of different dimensions were evaluated. Specimens with ratios of the cut edge to total surface area of 0.03 to 0.89 were fabricated and aged. The aged and unaged specimens were tested in compression as specified in Test Method for Compressive Properties of Rigid Plastics (ASTM D695M). Thickness changes, degraded surface layer growth, weight loss, and failure modes were monitored and recorded. All property changes were thickness dependent.Bowles, Kenneth J. and Tsuji, Luis and Kamvouris, John and Roberts, Gary D.Glenn Research CenterAGING (MATERIALS); ISOTHERMAL PROCESSES; FABRICATION; MECHANICAL PROPERTIES; POLYIMIDES; STRUCTURAL WEIGHT; COMPRESSIBILITY; COMPOSITE MATERIALS; FAILURE MODES; DURABILITY; PLASTICS; THICKNESS; DEGRADATION; SURFACE LAYERS; HIGH TEMPERATURE
Nontraditional Methods of Sensing Stress Strain and Damage in Materials and Structures
Author | : David A. Stubbs |
Publsiher | : ASTM International |
Total Pages | : 266 |
Release | : 1997 |
Genre | : Detectors |
ISBN | : 9780803124035 |
Download Nontraditional Methods of Sensing Stress Strain and Damage in Materials and Structures Book in PDF, Epub and Kindle
These facsimiles of 16 contributions from the symposium held in May 1996 in Orlando provide information on the behavior of materials and structures. The authors describe novel ways to measure point to point deformation (or strain, when normalized), procedures for measuring crack length and the stres
Recent Developments in Durability Analysis of Composite Systems
Author | : H. Dardon,H. Fukuda,K.L. Reifsnider,G. Verchery |
Publsiher | : CRC Press |
Total Pages | : 493 |
Release | : 2022-01-26 |
Genre | : Technology & Engineering |
ISBN | : 9781000443721 |
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The papers from these proceedings address experimental and analytical methods for the characterization and analysis of modern composite and adhesive systems. They have been produced to provide understanding that can be used to design safe, reliable engineering components.
Progress in Durability Analysis of Composite Systems
Author | : K.L. Reifsnider |
Publsiher | : CRC Press |
Total Pages | : 380 |
Release | : 1998-01-01 |
Genre | : Technology & Engineering |
ISBN | : 9054109602 |
Download Progress in Durability Analysis of Composite Systems Book in PDF, Epub and Kindle
Composite material systems are the basis for much of the natural world around us and are rapidly becoming the basis for many modern engineering components. A controlling feature for the general use of such systems is their damage tolerance, durability and reliability. The present book is a comprehensive cross section of the state of the art in the field of the durability of polymer-based, composite, and adhesive systems. As such, it is of special value to researchers concerned with the frontier of the field, to students concerned with the substance of the subject, and to the applied community concerned with the finding methodologies that make it possible to design safe and durable engineering components using material systems.
High Temperature and Environmental Effects on Polymeric Composites
Author | : Thomas S. Gates,Abdul-Hamid Zureick |
Publsiher | : ASTM International |
Total Pages | : 276 |
Release | : 1997 |
Genre | : Technology & Engineering |
ISBN | : 0803124244 |
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Long Term Isothermal Aging Effects on Weight Loss Compression Properties and Dimensions of T650 35 Fabric Reinforced PMR 15 Composites Data
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 64 |
Release | : 2003 |
Genre | : Electronic Book |
ISBN | : NASA:31769000647167 |
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Time Dependent Constitutive Behavior and Fracture Failure Processes Volume 3
Author | : Tom Proulx |
Publsiher | : Springer Science & Business Media |
Total Pages | : 406 |
Release | : 2011-05-10 |
Genre | : Technology & Engineering |
ISBN | : 9781441997944 |
Download Time Dependent Constitutive Behavior and Fracture Failure Processes Volume 3 Book in PDF, Epub and Kindle
This the third volume of six from the Annual Conference of the Society for Experimental Mechanics, 2010, brings together 56 chapters on Time-Dependent Constitutive Fracture and Failure. It presents early findings from experimental and computational investigations on Time Dependent Materials including contributions on Thermal and Mechanical Characterization, Coupled Experimental and Computational Analysis of Fracture Path Selection, Procedures for Mixed Mode Fracture Testing of Bonded Beams, and Experimental Study of Voids in High Strength Aluminum Alloys.