Author: United States. National Aeronautics and Space Administration
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A PROGRESSIVE DAMAGE METHODOLOGY FOR RESIDUAL STRENGTH PREDICTIONS OF NOTCHED COMPOSITE PANELS... NASA/TM-1998-207646... AUG. 6, 1998
Author: United States. National Aeronautics and Space Administration
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A Progressive Damage Methodology for Residual Strength Predictions of Notched Composite Panels
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722016609
Category :
Languages : en
Pages : 46
Book Description
The translaminate fracture behavior of carbon/epoxy structural laminates with through-penetration notches was investigated to develop a residual strength prediction methodology for composite structures. An experimental characterization of several composite materials systems revealed a fracture resistance behavior that was very similar to the R-curve behavior exhibited by ductile metals. Fractographic examinations led to the postulate that the damage growth resistance was primarily due to fractured fibers in the principal load-carrying plies being bridged by intact fibers of the adjacent plies. The load transfer associated with this bridging mechanism suggests that a progressive damage analysis methodology will be appropriate for predicting the residual strength of laminates with through-penetration notches. A progressive damage methodology developed by the authors was used to predict the initiation and growth of matrix cracks and fiber fracture. Most of the residual strength predictions for different panel widths, notch lengths, and material systems were within about 10% of the experimental failure loads. Coats, Timothy W. and Harris, Charles E. Langley Research Center RTOP 538-13-11-05...
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722016609
Category :
Languages : en
Pages : 46
Book Description
The translaminate fracture behavior of carbon/epoxy structural laminates with through-penetration notches was investigated to develop a residual strength prediction methodology for composite structures. An experimental characterization of several composite materials systems revealed a fracture resistance behavior that was very similar to the R-curve behavior exhibited by ductile metals. Fractographic examinations led to the postulate that the damage growth resistance was primarily due to fractured fibers in the principal load-carrying plies being bridged by intact fibers of the adjacent plies. The load transfer associated with this bridging mechanism suggests that a progressive damage analysis methodology will be appropriate for predicting the residual strength of laminates with through-penetration notches. A progressive damage methodology developed by the authors was used to predict the initiation and growth of matrix cracks and fiber fracture. Most of the residual strength predictions for different panel widths, notch lengths, and material systems were within about 10% of the experimental failure loads. Coats, Timothy W. and Harris, Charles E. Langley Research Center RTOP 538-13-11-05...
A Progressive Damage Methodology for Residual Strength Predictions of Notched Composite Panels
Author: Timothy W. Coats
Publisher:
ISBN:
Category :
Languages : en
Pages : 50
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 50
Book Description
NASA Langley Scientific and Technical Information Output: 1998
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 166
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 166
Book Description
A Progressive Damage Methodology for Residual Strength Predictions of Notched Composite Panels
Author: Timothy W. Coats
Publisher:
ISBN:
Category : Carbon composites
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category : Carbon composites
Languages : en
Pages : 0
Book Description
A Progressive Damage Methodology for Residual Strength Predictions of Center-Crack Tension Composite Panels
Author: Timothy William Coats
Publisher:
ISBN:
Category : Continuum damage mechanics
Languages : en
Pages : 150
Book Description
Publisher:
ISBN:
Category : Continuum damage mechanics
Languages : en
Pages : 150
Book Description
Damage Characteristics And Residual Strength Of Composite Sandwich Panels Impacted With And Without A ... NASA/TM-1998-208122 ... Oct. 26, 1998
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A Progressive Damage Methodology for Residual Strength Predictions of Center-crack Tension Composite Panesl
Author: Timothy William Coats
Publisher:
ISBN:
Category : Continuum damage mechanics
Languages : en
Pages : 266
Book Description
Publisher:
ISBN:
Category : Continuum damage mechanics
Languages : en
Pages : 266
Book Description
Progressive Damage Analysis of Laminated Composite (Pdalc)-A Computational Model Implemented in the NASA Comet Finite Element Code
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781729236956
Category : Science
Languages : en
Pages : 48
Book Description
A method for analysis of progressive failure in the Computational Structural Mechanics Testbed is presented in this report. The relationship employed in this analysis describes the matrix crack damage and fiber fracture via kinematics-based volume-averaged variables. Damage accumulation during monotonic and cyclic loads is predicted by damage evolution laws for tensile load conditions. The implementation of this damage model required the development of two testbed processors. While this report concentrates on the theory and usage of these processors, a complete list of all testbed processors and inputs that are required for this analysis are included. Sample calculations for laminates subjected to monotonic and cyclic loads were performed to illustrate the damage accumulation, stress redistribution, and changes to the global response that occur during the load history. Residual strength predictions made with this information compared favorably with experimental measurements. Lo, David C. and Coats, Timothy W. and Harris, Charles E. and Allen, David H. Langley Research Center RTOP 538-02-10-01
Publisher: Independently Published
ISBN: 9781729236956
Category : Science
Languages : en
Pages : 48
Book Description
A method for analysis of progressive failure in the Computational Structural Mechanics Testbed is presented in this report. The relationship employed in this analysis describes the matrix crack damage and fiber fracture via kinematics-based volume-averaged variables. Damage accumulation during monotonic and cyclic loads is predicted by damage evolution laws for tensile load conditions. The implementation of this damage model required the development of two testbed processors. While this report concentrates on the theory and usage of these processors, a complete list of all testbed processors and inputs that are required for this analysis are included. Sample calculations for laminates subjected to monotonic and cyclic loads were performed to illustrate the damage accumulation, stress redistribution, and changes to the global response that occur during the load history. Residual strength predictions made with this information compared favorably with experimental measurements. Lo, David C. and Coats, Timothy W. and Harris, Charles E. and Allen, David H. Langley Research Center RTOP 538-02-10-01
Progressive Damage Analysis of Laminated Composite (Pdalc)-A Computational Model Implemented in the NASA Comet Finite Element Code
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722644987
Category :
Languages : en
Pages : 46
Book Description
A method for analysis of progressive failure in the Computational Structural Mechanics Testbed is presented in this report. The relationship employed in this analysis describes the matrix crack damage and fiber fracture via kinematics-based volume-averaged variables. Damage accumulation during monotonic and cyclic loads is predicted by damage evolution laws for tensile load conditions. The implementation of this damage model required the development of two testbed processors. While this report concentrates on the theory and usage of these processors, a complete list of all testbed processors and inputs that are required for this analysis are included. Sample calculations for laminates subjected to monotonic and cyclic loads were performed to illustrate the damage accumulation, stress redistribution, and changes to the global response that occur during the load history. Residual strength predictions made with this information compared favorably with experimental measurements. Lo, David C. and Coats, Timothy W. and Harris, Charles E. and Allen, David H. Langley Research Center RTOP 538-02-10-01...
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722644987
Category :
Languages : en
Pages : 46
Book Description
A method for analysis of progressive failure in the Computational Structural Mechanics Testbed is presented in this report. The relationship employed in this analysis describes the matrix crack damage and fiber fracture via kinematics-based volume-averaged variables. Damage accumulation during monotonic and cyclic loads is predicted by damage evolution laws for tensile load conditions. The implementation of this damage model required the development of two testbed processors. While this report concentrates on the theory and usage of these processors, a complete list of all testbed processors and inputs that are required for this analysis are included. Sample calculations for laminates subjected to monotonic and cyclic loads were performed to illustrate the damage accumulation, stress redistribution, and changes to the global response that occur during the load history. Residual strength predictions made with this information compared favorably with experimental measurements. Lo, David C. and Coats, Timothy W. and Harris, Charles E. and Allen, David H. Langley Research Center RTOP 538-02-10-01...