Multi-Phase Finite Element Modeling of Machining Unidirectional Fiber Reinforced Composites

2007 ◽  
Author(s):  
Chinmaya R. Dandekar ◽  
Yung C. Shin
Keyword(s):  
Finite Element ◽  
Temperature Distribution ◽  
Fiber Orientation ◽  
Cohesive Zone ◽  
Interfacial Layer ◽  
Shear Failure ◽  
Cohesive Zone Modeling ◽  
Fiber Reinforced ◽  
Phase Approach ◽  
Multi Phase

A multi-phase and a continuum based finite element model using the commercial finite element package ABAQUS is developed for simulating the orthogonal machining of composite materials. The materials considered for this study are a glass fiber reinforced epoxy composite and a ceramic matrix composite. The effect of varying the fiber orientation and tool rake angle on the cutting force, temperature distribution and damage during machining are considered. In the multi-phase approach the fiber and matrix are modeled as continuum elements with isotropic properties separated by an interfacial layer while the tool is modeled as a rigid body. The cohesive zone modeling approach is used for the interfacial layer. Bulk deformation and shear failure is considered in the fiber and matrix while the traction separation in the cohesive zone is used to ascertain the extent of delamination below the work surface. For validation purposes simulation results of the multi-phase approach are compared with experimental measurements. Parametric studies are conducted utilizing the equivalent homogenous (EHM) material model. The EHM simplifies the composite material into an anisotropic but locally homogenous material. External heating effect on the workpiece is considered in the EHM model to include preliminary results on Laser Assisted Machining. The model is successful in predicting cutting forces, temperature distribution entry and exit damage with respect to the fiber orientation.

Multiphase Finite Element Modeling of Machining Unidirectional Composites: Prediction of Debonding and Fiber Damage

2008 ◽  
Vol 130 (5) ◽  
Author(s):  
Chinmaya R. Dandekar ◽  
Yung C. Shin
Keyword(s):  
Finite Element ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Glass Fiber ◽  
Cutting Force ◽  
Fiber Orientation ◽  
Brittle Failure ◽  
Interfacial Layer ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced

A multiphase finite element model using the commercial finite element package ABAQUS/EXPLICIT is developed for simulating the orthogonal machining of unidirectional fiber reinforced composite materials. The composite materials considered for this study are a glass fiber reinforced epoxy and a tube formed carbon fiber reinforced epoxy. The effects of varying the fiber orientation angle and tool rake angle on the cutting force and damage during machining are considered for the glass fiber reinforced epoxy. In the case of carbon fiber reinforced epoxy, only the effect of fiber orientation on the measured cutting force and damage during machining is considered. Two major damage phenomena are predicted: debonding at the fiber-matrix interface and fiber pullout. In the multiphase approach, the fiber and matrix are modeled as continuum elements with isotropic properties separated by an interfacial layer, while the tool is modeled as a rigid body. The cohesive zone modeling approach is used for the interfacial layer to simulate the extent of debonding below the work surface. Bulk deformation and shear failure are considered in the matrix for both the models and the glass fiber. A brittle failure criterion is used for the carbon fiber specimen and is coded in FORTRAN as a user defined material (VUMAT). The brittle failure of the carbon fibers is modeled using the Marigo model for brittle failure. For validation purposes, simulation results of the multiphase approach are compared with experimental measurements of the cutting force and damage. The model is successful in predicting cutting forces and damage at the front and rear faces with respect to the fiber orientation. A successful prediction of fiber pullout is also demonstrated in this paper.

Numerical Analysis of Punching Shear Failure of Self-Compacting Fiber Reinforced Concrete (SCFRC) Ribbed Slabs

2019 ◽  
Vol 972 ◽  
pp. 93-98
Author(s):  
Nurulain Hanida Mohamad Fodzi ◽  
M.H. Mohd Hisbany
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Shear Failure ◽  
Nonlinear Finite Element ◽  
Fiber Reinforced Concrete ◽  
Punching Shear ◽  
Nonlinear Finite Element Method ◽  
Fiber Reinforced ◽  
Element Analysis ◽  
Abaqus Software

This paper deals with behavior and capacity of punching shear resistance for ribbed slabs produce from self-compacting fiber reinforced concrete (SCFRC) by application of nonlinear finite element method. The analysis will be achieved by using ABAQUS software. The nonlinear finite element analysis by ABAQUS will be compare with the experimental results. Results and conclusions may be useful for establishing recommendation and need to be acknowledged.

Analysis of the Shear Behavior of Fiber-Reinforced Foam Concrete Beams Using Non-Linear Finite Element Method

2021 ◽  
Vol 1042 ◽  
pp. 139-144
Author(s):  
Nizar Helmi ◽  
Mochammad Afifuddin ◽  
Muttaqin Hasan
Keyword(s):  
Finite Element ◽  
Numerical Analysis ◽  
Experimental Research ◽  
Shear Failure ◽  
Shear Behavior ◽  
Experimental Models ◽  
Fiber Reinforced ◽  
Foam Concrete ◽  
Strength Capacity ◽  
The Difference

Structural elements such as beams most times experience shear failure suddenly without prior warning and this is different from bending failure which occurs by gradual yielding of tensile reinforcement. A previous experimental research showed that the use of lightweight foam concrete with a fiber mixture has a higher ductility in comparison to the normal concrete. It is also one of the solutions to increase the shear strength capacity of concrete and also has the ability to cause relatively small crack patterns and spread. This research, therefore, aimed to determine the shear behavior of fiber-reinforced foam concrete using a finite element with 3-dimensional modeling in an ATENA V5 software. Moreover, the results obtained were were compared with the findings of the experimental research. The test object used was a beam designed with 15 cm x 30 cm x 220 cm dimensions and the stirrup spacing for the fiber-reinforced foam concrete (BBSN-20) was 20 cm while the normal beam (BN-25) had 25 cm. The numerical analysis was observed to have shown closer values to the experimental results with the difference in the ultimate load on the BBSN-20 and BN-25 recorded to be only 7.73% and 12.6% while the ultimate deflection was 6.92% and 32.45% respectively. Meanwhile, the beam destruction patterns in both the numerical and experimental models were similar but the numerical analysis showed the two beams modeled did not experience shear failure as planned.

Sign in / Sign up

Export Citation Format

Share Document