CONTINUOUS MODELING TECHNIQUE OF FIBER PULLOUT FROM A CEMENT MATRIX WITH DIFFERENT INTERFACE MECHANICAL PROPERTIES USING FINITE ELEMENT PROGRAM

Authors

  • LEANDRO FERREIRA FRIEDRICH FEDERAL UNIVERSITY OF PAMPA
  • CHONG WANG FEDERAL UNIVERSITY OF PAMPA

Keywords:

MODELING OF FIBER PULLOUT, FIBER/MATRIX INTERFACE MODEL, FINITE ELEMENT METHOD, VARIABLE STIFFNESS SPRING ELEMENT,

Abstract

FIBER/CEMENT INTERFACE PERFORMANCE HAS A GREAT INFLUENCE ON THE MECHANICAL PROPERTIES OF THE FIBER REINFORCED COMPOSITE. THIS INFLUENCE IS MAINLY PRESENTED DURING FIBER PULLOUT FROM THE MATRIX. AS FIBER PULLOUT PROCESS CONSISTS OF FIBER DEBONDING STAGE AND PULLOUT STAGE WHICH INVOLVE COMPLEX CONTACT PROBLEM, NUMERICAL MODELING IS A BEST WAY TO INVESTIGATE THE INTERFACE INFLUENCE. ALTHOUGH MANY NUMERICAL RESEARCH WORKS HAVE BEEN DONE, PRACTICAL AND EFFECTIVE TECHNIQUE SUITABLE FOR MODELING WHOLE FIBER PULLOUT PROCESS IS STILL SCARCE. BY INTERACTING THE POPULAR FINITE ELEMENT PROGRAM ANSYS WITH THE MATLAB, WE PROPOSED SYSTEMATIC MODELING TACTICS AND REALIZED WHOLE MODELING OF FIBER PULLOUT FROM CEMENT MATRIX WITH DESIRED INTERFACE MECHANICAL PERFORMANCE. FOR DEBONDING PROCESS, WE USED INTERFACE ELEMENTS WITH COHESIVE SURFACE TRACTION AND EXPO-NENTIAL FAILURE BEHAVIOR. FOR PULLOUT PROCESS, WE SWITCHED INTERFACE ELEMENTS TO SPRING ELEMENTS WITH VARIABLE STIFFNESS, WHICH IS RELATED TO THE INTERFACE SHEAR STRESS AS A FUNCTION OF THE INTERFACE SLIP DIS-PLACEMENT. FOR BOTH PROCESSES, THE RESULTS OBTAINED ARE VERY GOOD IN COMPARISON WITH OTHER NUMERICAL OR ANALYTICAL MODELS AND EXPERIMENTAL TESTS. USING THE MODELING TACTICS PRESENTED, WE CAN MODEL TOUGHENING ACHIEVED BY RANDOMLY DISTRIBUTED FIBERS.

Author Biographies

LEANDRO FERREIRA FRIEDRICH, FEDERAL UNIVERSITY OF PAMPA

LEANDRO FERREIRA FRIEDRICH IS A GRADUATE STUDENT OF GRADUATE PROGRAM IN ENGINEERING.

CHONG WANG, FEDERAL UNIVERSITY OF PAMPA

WANG CHONG IS AN ADJUNCT PROFESSOR OF MECHANICAL ENGINEERING IN THE FEDERAL UNIVERSITY OF PAMPA IN BRAZIL SINCE THE SUMMER OF 2009. HE GRADUATED FROM THE UNIVERSITY OF SCIENCE AND  TECHNOLOGY  OF  CHINA  (USTC)  IN  1982, RECEIVED  AN  MSC  FROM  THE  CHINESE  ACADEMY  OF SCIENCES  (CAS)  IN  1985  AND  EARNED  HIS DOCTORATE  FROM  CHINA  UNIVERSITY  OF  MINING  AND TECHNOLOGY (CUMT) IN 1988. AS A LECTURER, HE TAUGHT GRADUATE COURSES IN CUMT FROM 1989 TO 1992;  AS  A  VISITING  SCIENTIST,  HE  WORKED  AT  THE FEDERAL  UNIVERSITY  OF  SÃO  CARLOS  FROM  1993  TO 1995 AND AT THE UNIVERSITY OF SÃO PAULO IN BRAZIL FROM 1996 TO 1997. AS AN ADJUNCT PROFESSOR, HE TAUGHT GRADUATE COURSES IN THE UNIVERSIDADE REGIONAL DO NOROESTE DO ESTADO DO RIO GRANDE DO SUL IN BRAZIL.

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Published

2016-05-18

Issue

Vol. 13 No. 10 (2016)

Section

Articles

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