Author: AF. Grandt
Publisher:
ISBN:
Category : Crack opening displacement
Languages : en
Pages : 27
Book Description
A series of fatigue crack growth experiments was conducted on a transparent polymer (PMMA) using a surface flaw geometry in bending. A Newton interferometric technique was used to measure crack opening displacements and closure for four different loading histories. Results are presented for conditions of constant applied stress-intensity factor along the crack face free surface, at the crack tip in the depth direction, for constant applied load range, and for a block loading sequence.
Observations of Three-Dimensional Surface Flaw Geometries During Fatigue Crack Growth in PMMA
Surface-crack Growth
Author: Walter G. Reuter
Publisher: ASTM International
ISBN: 080311284X
Category : Fracture mechanics
Languages : en
Pages : 428
Book Description
From the symposium (on title) held in Sparks, Nevada, April 1988. Twenty-two peer-reviewed papers are divided into sections on models and experiments (monotonic loading), and fatigue crack growth. Areas addressed include the differences in constraint for 2-D through-thickness cracks and 3-D surface
Publisher: ASTM International
ISBN: 080311284X
Category : Fracture mechanics
Languages : en
Pages : 428
Book Description
From the symposium (on title) held in Sparks, Nevada, April 1988. Twenty-two peer-reviewed papers are divided into sections on models and experiments (monotonic loading), and fatigue crack growth. Areas addressed include the differences in constraint for 2-D through-thickness cracks and 3-D surface
Three-Dimensional Aspects of Fatigue Crack Closure in Surface Flaws in Polymethylmethacrylate Material
Author: AF. Grandt
Publisher:
ISBN:
Category : Crack opening displacement
Languages : en
Pages : 19
Book Description
An experimental investigation using a Newton interference method with a transparent polymethylmethacrylate (PMMA) to measure crack opening displacement and closure on surface flaw crack growth is described. Fatigue crack growth tests are conducted on rectangular plates loaded in bending using optical interferometry measurements to map the crack surface opening displacement profiles and define crack opening loads. Results are presented for an experiment of constant applied stress intensity factor along the crack face free surface. The crack opening displacement patterns and measured closure loads are found to be strongly influenced by the formation of a void internal to the crack surfaces.
Publisher:
ISBN:
Category : Crack opening displacement
Languages : en
Pages : 19
Book Description
An experimental investigation using a Newton interference method with a transparent polymethylmethacrylate (PMMA) to measure crack opening displacement and closure on surface flaw crack growth is described. Fatigue crack growth tests are conducted on rectangular plates loaded in bending using optical interferometry measurements to map the crack surface opening displacement profiles and define crack opening loads. Results are presented for an experiment of constant applied stress intensity factor along the crack face free surface. The crack opening displacement patterns and measured closure loads are found to be strongly influenced by the formation of a void internal to the crack surfaces.
International Aerospace Abstracts
Influence of Fatigue Crack Closure on the Growth Rate of Surface Flaws
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 239
Book Description
Inconsistent experimental results of fatigue crack closure studies over the past 15 years have caused recent investigators to conclude that the fundamental phenomena controlling the crack driving mechanisms are not understood. A major contributor to this misunderstanding is an inadequate understanding of the complex three-dimensional nature of closure. This is true for two-dimensional thru-the-thickness cracks as well as for three-dimensional part-thru surface cracks. To assess the three-dimensional influences of fatigue crack closure on the growth rate of surface flaws, an experimental investigation was conducted using a rectangular plate of polymethylmethacrylate (PMMA) material loaded in four-point bending. The use of transparent PMMA material and a Newton optical interferometer system with a laser light source provided the capability to simultaneously measure three-dimensional crack opening displacement (COD) profiles and closure loads (Pc1).
Publisher:
ISBN:
Category :
Languages : en
Pages : 239
Book Description
Inconsistent experimental results of fatigue crack closure studies over the past 15 years have caused recent investigators to conclude that the fundamental phenomena controlling the crack driving mechanisms are not understood. A major contributor to this misunderstanding is an inadequate understanding of the complex three-dimensional nature of closure. This is true for two-dimensional thru-the-thickness cracks as well as for three-dimensional part-thru surface cracks. To assess the three-dimensional influences of fatigue crack closure on the growth rate of surface flaws, an experimental investigation was conducted using a rectangular plate of polymethylmethacrylate (PMMA) material loaded in four-point bending. The use of transparent PMMA material and a Newton optical interferometer system with a laser light source provided the capability to simultaneously measure three-dimensional crack opening displacement (COD) profiles and closure loads (Pc1).
Engineered Materials Abstracts
Prediction of Fatigue Crack-growth Patterns and Lives in Three-dimensional Cracked Bodies
Cyclic Deformation, Fracture, and Nondestructive Evaluation of Advanced Materials
Author: Michael R. Mitchell
Publisher: ASTM International
ISBN: 0803119895
Category : Composite materials
Languages : en
Pages : 405
Book Description
Examines the initiation and growth of fatigue cracks and the fracture toughness of advanced materials such as silicon nitride, special alloys and steels, thermoplastics, and graphite-epoxy composites; and explains several non-destructive techniques to evaluate such materials for manufacturing defect
Publisher: ASTM International
ISBN: 0803119895
Category : Composite materials
Languages : en
Pages : 405
Book Description
Examines the initiation and growth of fatigue cracks and the fracture toughness of advanced materials such as silicon nitride, special alloys and steels, thermoplastics, and graphite-epoxy composites; and explains several non-destructive techniques to evaluate such materials for manufacturing defect
Rules of Thumb for Mechanical Engineers
Author: J. Edward Pope
Publisher: Gulf Professional Publishing
ISBN: 0884157903
Category : Technology & Engineering
Languages : en
Pages : 417
Book Description
Fluids -- Heat transfer -- Thermodynamics -- Mechanical seals -- Pumps and compressors -- Drivers -- Gears -- Bearings -- Piping and pressure vessels -- Tribology -- Vibration -- Materials -- Stress and strain -- Fatigue -- Instrumentation -- Engineering economics.
Publisher: Gulf Professional Publishing
ISBN: 0884157903
Category : Technology & Engineering
Languages : en
Pages : 417
Book Description
Fluids -- Heat transfer -- Thermodynamics -- Mechanical seals -- Pumps and compressors -- Drivers -- Gears -- Bearings -- Piping and pressure vessels -- Tribology -- Vibration -- Materials -- Stress and strain -- Fatigue -- Instrumentation -- Engineering economics.
Three-dimensional Analysis of Crack Growth
Author: Yaoming Mi
Publisher: Computational Mechanics
ISBN:
Category : Nature
Languages : en
Pages : 208
Book Description
Publisher: Computational Mechanics
ISBN:
Category : Nature
Languages : en
Pages : 208
Book Description