Computational simulation of progressive fracture in fiber composites

Cover of: Computational simulation of progressive fracture in fiber composites |

Published by National Aeronautics and Space Administration, For sale by the National Technical Information Service in [Washington, D.C.], [Springfield, Va .

Written in English

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Subjects:

  • Fracture mechanics.,
  • Fibrous composites.

Edition Notes

Book details

StatementChristos C. Chamis.
SeriesNASA technical memorandum -- 87341.
ContributionsUnited States. National Aeronautics and Space Administration.
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL14664284M

Download Computational simulation of progressive fracture in fiber composites

The computational simulation of progressive fracture In fiber composites.: The experimental studies include development of methods for real time ultrasonic C-scan of laminates under _ad in order to detect fracture initiation, damage growth and fracture progression.

Computational methods for simulating progressive fracture in fiber composite structures are presented. These methods are integrated into a computer code of modular form. The modules include composite mechanics, finite element analysis, and fracture by: 7.

to simulate structural fracture in fiber composites needs to formally quantlfy: (I) these multiple fracture modes, (2) the types of flaws they initiate, and (3) the coalescing and propagation of these flaws to cr}tical d}mensions for.

Computational methods for simulating and predicting progressive fracture in fiber composite structures are presented.

These methods are integrated into a computer code of modular form. The modules include composite mechanics, finite element analysis, and fracture : C. Chamis. degradation is simulated by composite mechanics in ICAN.4 The progressive degradation is predicted by an incremental approach with damage tracking and the corresponding stress redistribution.

All these are included in CODSTRAN as is depicted schematically in Fig. 2 for the CODSTRAN computational simulation of progressive Size: 5MB. The generic types of composite structural fracture illustrated in this report are: (1) single and combined mode fracture in beams, (2) laminate free-edge delamination fracture, (3) laminate center flaw progressive fracture, and (4) plate and shell structural fractures.

Structural fracture. A methodology was developed for the computational simulation of structural fracture in fiber composites. This methodology consists of step-by-step procedures for mixed-mode fracture in generic components and an integrated computer code, Composite Durability Structural Analysis (CODSTRAN).

The generic types of composite structural fracture include: (1) single and combined mode fracture. Structural Behavior of Composites with Progressive Fracture 4. Progression of Damage and Fracture in Composites under Dynamic Loading 5. Composite Structure Global Fracture Toughness via Computational Simulation 6.

Structural Durability of a Composite Pressure Vessel 7. Progressive Fracture in Composites Subjected to Hygrothermal Environment 8. A methodology was developed for the computational simulation of structural fracture in fiber composites. This methodology consists of step-by-step procedures for mixed mode fracture in generic components and of an integrated computer code, Composite Durability Structural Analysis (CODSTRAN).

The generic types of composite structural fracture include single and combined mode fracture. Computational simulation of progressive fracture in fiber composites book fiber-reinforced composite stiffened plate with [0/90/±45] S plies made of S-Glass/epoxy are evaluated via computational simulation to study damage and fracture progression.

The loads are pressure and temperature which varies from 21 to °C (case I) and from to 21 °C (case II). Progressive damage and fracture of adhesively bonded graphite/epoxy composite structures are evaluated Computational simulation of progressive fracture in fiber composites book computational simulation.

Load induced damage in both the adhesive bond and the adjoining laminate is considered. An integrated computer code is used for the simulation of structural degradation under loading.

Abstract. A methodology was developed for the computational simulation of structural fracture in fiber composites. This methodology consists of step-by-step procedures for mixed mode fracture in generic components and of an integrated computer code, Composite Author: C.

Chamis and P. Murthy. Fiber/matrix fracture and fiber-matrix interface debonding in a metal matrix composite (MMC) are computationally simulated. These simulations are part of a research activity to develop computational methods for microfracture, microfracture propagation and fracture toughness of the metal matrix composites.

The three-dimensional finite element model used in the simulation consists of a group. Damage progression and fracture of built-up composite structures is evaluated by using computational simulation. The objective is to examine the behavior and response of a stiffened composite (0 +//90)(sub s6) laminate panel by simulating the damage initiation, growth, accumulation, progression and propagation to structural collapse.

An integrated computer code CODSTRAN was augmented for. Detailed modeling of deformation and fracture of composite materials is widely considered a critical step towards a new design and qualification paradigm where significant amount of testing will be replaced by computational simulation.

The complexity of the problem lies in the interaction of various modes of damage such as matrix cracking. Abstract. The damage progression and fracture of builtup composite structures was evaluated by using computational simulation to examine the behavior and response of a stiffened composite (0 +/- 45/90)(sub s6) laminate panel subjected to a bending load.

Get this from a library. Computational simulation of progressive fracture in fiber composites. [C C Chamis; United States. National Aeronautics and Space Administration.].

This work presents experimental and computational studies on progressive failure analysis of notched cross-ply carbon fiber reinforced polymer (CFRP) composite. The carbon/epoxy composite laminated with [90/0] s layup is tested using double-notched specimens loaded in tension.

The load-displacement curve, failure load and damage patterns of all. CODSTRAN is able to simulate damage initiation, damage growth, and fracture in composites under various loading and environmental conditions.

The simulation of progressive fracture was first verified to be in reasonable agreement with experimental data from. XFEM Fracture Analysis of Composites. Author(s): Soheil Mohammadi; This book describes the basics and developments of the new XFEM approach to fracture analysis of composite structures and materials.

It provides state of the art techniques and algorithms for fracture analysis of structures including numeric examples at the end of each. The topics of contributed chapters range from scaling and homogenization procedures in composites, integral and statistic characteristic of composites, thin plate and wave solutions in anisotropic materials, laminated structures, instability, fracture and damage analysis of composites to highly efficient methods for simulation of composites Reviews: 1.

An efficient and novel micromechanical computational platform for progressive failure analysis of fiber-reinforced composites is presented. The numerical framework is based on a recently developed micromechanical platform built using a class of refined beam models called Carrera unified formulation (CUF), a generalized hierarchical formulation which yields a refined structural theory via.

Selected methods of computation for simulation of mechanical behavior of fiber/matrix composite materials described in report. For each method, report describes significance of behavior to be simulated, procedure for simulation, and representative results. Following applications discussed: effects of progressive degradation of interply layers on responses of composite structures, dynamic.

Purchase Numerical Modelling of Failure in Advanced Composite Materials - 1st Edition. Print Book & E-Book. ISBNAbstract. Fiber/matrix fracture and fiber-matrix interface debonding in a metal matrix composite (MMC) are computationally simulated.

These simulations are part of a research activity to develop computational methods for microfracture, microfracture propagation and fracture toughness of the metal matrix composites.

Get this from a library. Computational simulation of structural fracture in fiber composites. [C C Chamis; P L N Murthy; United States.

National Aeronautics and Space Administration.]. law for fiber-tension damage is perhaps more critical than the fracture energy value. Results for simulation of bearing damage using the commercial damage model are presented and some limitations of the model are discussed.

1 Introduction With the increasing use of fiber-reinforced plastics (FRPs) in aerospace structures, the. Computational prediction of energy release rate is based on composite mechanics with micro-stress level damage assessment, finite element structural analysis and damage progression tracking modules.

In this paper, Mode I interlaminar and intralaminar fracture toughness G IC of composites are examined by computational simulation. A computational model was developed to simulate the progressive damage of fiber-reinforced brittle matrix composites under uniaxial tensile loading.

@article{osti_, title = {Yield and failure criteria for composite materials under static and dynamic loading}, author = {Daniel, Isaac M.}, abstractNote = {To facilitate and accelerate the process of introducing, evaluating and adopting of new material systems, it is important to develop/establish comprehensive and effective procedures of characterization, modeling and failure.

macroscopic properties of a composite can be obtained by means of numerical simulation of the deformation and failure of the microstructure (Xia et al., ; F. Zhang et al., ). In our previous work, the local cyclic shear plasticity of the interface around a broken fiber.

This work focuses on the numerical simulation of damage and fracture of unidirectional fiber-reinforced composite structures using finite element method.

A computational model is presented which. components made up of composite materials demands many stages of parametric study. One such parametric study is the fatigue analysis of composite material.

This paper focuses on the fatigue life analysis of the composite material by using computational techniques. A composite plate is considered for the study which has a hole at the center. Chamis, Computational simulation of progressive fracture in fiber composites (NASA TMMay ).

Google Scholar; L. Minnetyan, C. Chamis and P. Murthy, Damage and fracture in composite thin shells (NASA TMOct. Google Scholar. The fundamental premise of computational simulation is that the complete evaluation of laminated composite fracture requires an assessment of ply and subply level damage/fracture processes.

Progressive crushing failure in which a stable zone of micro-fracture, such as fiber breakage, fiber kinking, and matrix cracking, propagates down is generally preferred for better energy absorption in fiber reinforced composite tubes subjected to axial compression.

There are two extremes of crushing modes, splaying and fragmentation. In this paper an overview of the research activities related to an approach that has been developed independent of stress intensity factors and fracture toughness parameters is presented for the computational simulation of progressive fracture in polymer-matrix composite structures.

Get this from a library. Fracture toughness computational simulation of general delaminations in fiber composites. [T E Wilt; P L N Murthy; C C Chamis; United States. National Aeronautics and.

This report results from a contract tasking University of Porto as follows: Structural failure of laminated composites is the result of the accumulation of several damage mechanisms such as matrix cracking, fiber fracture, fiber kinking, and delamination.

The use of advanced physically-based computational models in the simulation of the mechanical response of laminated composites can reduce. The mechanical characterization of textile composites is a challenging task, due to their nonuniform deformation and complicated failure phenomena.

This article introduces a three-dimensional mesoscale finite element model to investigate the progressive damage behavior of a notched single-layer triaxially-braided composite subjected to axial tension.

@article{osti_, title = {Ceramic matrix composite behavior -- Computational simulation}, author = {Chamis, C C and Murthy, P L.N. and Mital, S K}, abstractNote = {Development of analytical modeling and computational capabilities for the prediction of high temperature ceramic matrix composite behavior has been an ongoing research activity at NASA-Lewis Research Center.This bound edition presents multiple investigations into various aspects of fatigue in composite materials and structures.

This work is divided into three sections. The first section presents research into various aspects of fatigue modeling, including prediction of fatigue life, fatigue strength and fatigue crack growth rate.

The second section deals primarily with experimental.1 PARTICLE MODELS: SIMULATION OF DAMAGE AND FRACTURE IN COMPOSITES USING A DISCRETE ELEMENT APPROACH Falk K. Wittel1, Ferenc Kun2, and Hans J. Herrmann3 1Institute for Statics and Dynamics of Aerospace Structures, University of Stuttgart, Pfaffenwaldr D Stuttgart 2Department of Theoretical Physics, University of Debrecen, P.O.

Box 5, H Debrecen.

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