Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 38
Book Description
Inelastic Deformation Mechanisms in SCS-6/Ti 15-3 MMC Lamina Under Compression
Author: Inelastic Deformation Mechanisms in SCS-6/Ti 15-3 Metal Matrix Composite (MMC) Lamina Under Compression
Author: FW. BrustPublisher:
ISBN:
Category : Compression
Languages : en
Pages : 23
Book Description
An investigation was undertaken to study the inelastic deformation mechanisms in [0]8 and [90]8 Ti 15-3/SCS-6 lamina subjected to pure compression. Monotonic tests were conducted at room temperature (RT), 538°C, and 650°C. Results indicate that mechanical response and deformation characteristics were different in monotonic tension and compression loading whereas some of those differences could be attributed to residual stress effects. There were other differences because of changes in damage and failure modes. The inelastic deformation in the [0]8 lamina under compression was controlled primarily by matrix plasticity, although some evidence of fiber-matrix debonding was observed. Failure of the specimen in compression was due to fiber buckling in a macroscopic shear zone (the failure plane). The inelastic deformation mechanisms under compression in [90]8 lamina were controlled by radial fiber fracture, matrix plasticity, and fiber-matrix debonding. The radial fiber fracture was a new damage mode observed by MMCs. Constitutive response was predicted for both the [0]8 and [90]8 laminae, using AGLPLY, METCAN, and Battelle's Unit Cell FEA model. Results from the analyses were encouraging.
Life Prediction Methodology for Titanium Matrix Composites
Author: W. Steven JohnsonPublisher: ASTM International
ISBN: 0803120397
Category : Metallic composites
Languages : en
Pages : 625
Book Description
Papers presented at the March 1994 symposium are organized into five sections that progress from basic understanding of mechanical damage mechanisms and environmental effects to life prediction methodology. Five papers discuss the interplay between interfacial strength, residual thermal stresses, an
Scientific and Technical Aerospace Reports
Author: Titanium Matrix Composites
Author: Shankar MallPublisher: CRC Press
ISBN: 1000725472
Category : Technology & Engineering
Languages : en
Pages : 482
Book Description
A review and summary of advancements related to mechanical behavior and related mechanics issues of titanium matrix composites (TMCs), a class of high-temperature materials useful in the propulsion and airframe components in advanced aerospace systems. After an introduction to TMCs, different authors review and summarise the advancements related to mechanical behavior and related mechanics issues of TMCs.
Monthly Catalog of United States Government Publications
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1282
Book Description
Contemporary Research in Engineering Science
Author: Romesh C. BatraPublisher: Springer Science & Business Media
ISBN: 3642800017
Category : Technology & Engineering
Languages : en
Pages : 696
Book Description
Fatigue failures occur in aerospace,marine,nuclear structures and automobile com ponents from initiation and propagation of cracks from holes,scratches or defects in the material. To design against these failures, crack propagation life and fracture strength need to be accurately predicted. It is reported in the literature, that these failures often initiate as surface cracks, corner cracks and cracks emanating from fastner holes. Such cracks are with elliptic or nearly elliptic in shapes. The deviation from elliptic shape is due to varying constraint effect along the crack front. Even in situations, when the cracks are through the thickness of the material, there would be thicknesswise variation of constraint effects leading to three dimensional nature of crack growth. Accurate predictions of the crack growth in these cases by numerical methods can be made only by solving three-dimensional boundary value problems. Empirical relationships have been developed [1] based on Linear Elastic Fracture Mechanics over years describing fatigue crack growth response. Some of these empirical relationships required modifications in the later stages, to meet the design applications. The Crack closure phenomenon discovered by Elber[2, 3] during the crack growth phase is mainly attributed to the local material yielding near the crack tip and the consequent residual plastic wake behind the crack tip. It helped considerably in understanding several aspects of fatigue crack growth and rewrite these relations.
Monthly Catalogue, United States Public Documents
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1284
Book Description
Author: Golam M. Newaz
Author: