progressive failure analysis
Recently Published Documents


TOTAL DOCUMENTS

290
(FIVE YEARS 24)

H-INDEX

28
(FIVE YEARS 0)

2021 ◽  
Vol 5 (9) ◽  
pp. 251
Author(s):  
Eivind Hugaas ◽  
Nils Petter Vedvik ◽  
Andreas T. Echtermeyer

A progressive FEA mechanical fatigue degradation model for composites was developed and implemented using a UMAT user material subroutine in Abaqus. Numerical results were compared to experimental strain field data from high frequency digital image correlation (DIC) of split disk fatigue testing of pressure vessel cut outs with holes. The model correctly predicted the onset and evolution of damage in the matrix as well as the onset of fiber failure. The model uses progressive failure analysis based on the maximum strain failure criterion, the cycle jump method, and Miner’s sum damage accumulation rule. A parameter study on matrix properties was needed to capture the scatter in strain fields observed experimentally by DIC. S-N curve for the matrix material had to be lowered by 0% to 60% to capture the experimental scatter. The onset of local fiber failure had to be described by local S-N curves measured by DIC having 2.5 times greater strain than that of S-N curves found from standard coupon testing.


2021 ◽  
Vol 1185 (1) ◽  
pp. 012020
Author(s):  
Ch. Srilakshmi ◽  
G. Sambasivarao ◽  
J. Suresh Kumar

Author(s):  
Eivind Hugaas ◽  
Nils Petter Vedvik ◽  
Andreas T. Echtermeyer

A progressive FEA fatigue degradation model for composites was developed and implemented using a UMAT user material subroutine in Abaqus. Numerical results were compared to experimental strain field data from high frequency Digital Image Correlation (DIC) of split disk fatigue testing of pressure vessel cut outs with holes. The model correctly predicted the onset and evolution of damage in the matrix as well as the onset of fiber failure. The model use progressive failure analysis based on the maximum strain failure criterion, the cycle jump method and Miner sum damage accumulation rule. A parameter study on matrix properties was needed to capture the scatter in strain fields observed experimentally by DIC. S-N curve for the matrix material had to be lowered by 0% to 60% to capture the experimental scatter. The onset of local fiber failure had to be described by local S-N curves measured by DIC having 2.5 times greater strain than that of S-N curves found from standard coupon testing.


2021 ◽  
pp. 1043-1048
Author(s):  
Takuo Yamagami ◽  
Satoru Yamabe ◽  
Jing-Cai Jiang ◽  
Younus Ahmed Khan

Sign in / Sign up

Export Citation Format

Share Document