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Simulation of impact damage in thin CFRP laminates

JAXA Supercomputer System Annual Report April 2019-March 2020

Report Number: R19EA1601

Subject Category: Aeronautical Technology

PDF available here

  • Responsible Representative: Toshiya Nakamura, Director, Aeronautical Technology Directorate, Structures and Advanced Composite Research Unit
  • Contact Information: Yuichiro Aoki(aoki.yuichiro@jaxa.jp)
  • Members: Yuichiro Aoki, Toshiyuki Kasahara

Abstract

Study on simulation method for progressive failure in composite materials

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

Parallel calculation of JAXA supercomputer system enables to reduce the total computation time because the progressive failure analysis of composite materials require a lot of iterative simulation.

Achievements of the Year

A progressive failure model that can simulate the impact damage failure for 8ply CFRP laminates is established (Fig. 1). Delamination initiation and growth in the laminates during impact are considered, and the following findings are obtained.

The damage propagation shows the different behavior at the impact energy level larger than 5.34J. With the 6.67J impact energy, damage continues to propagate even after unloading. The propagation rate increases in proportion to the energy.(Fig. 2)

Especially, it was found that the delamination propagates significantly between the layers immediately below the middle layer of the laminate. This is because the magnitude of stress near the middle layer is more prominent than others due to the combination of internal shear stress and in-plane tensile stress caused by bending deformation during impact.(Fig. 3)

Annual Reoprt Figures for 2019

Fig.1: Finite element model

 

Annual Reoprt Figures for 2019

Fig.2: Comparison of delamination propagtion history with different impact enegies

 

Annual Reoprt Figures for 2019

Fig.3: Typical impact damage prediction result at 8.00J impact energy

 

Publications

N/A

Usage of JSS2

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: N/A
  • Number of Processes: 2 – 228
  • Elapsed Time per Case: 10 Hour(s)

Resources Used

 

Fraction of Usage in Total Resources*1(%): 0.02

 

Details

Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.

Computational Resources
System Name Amount of Core Time
(core x hours)
Fraction of Usage*2(%)
SORA-MA 0.00 0.00
SORA-PP 76.53 0.00
SORA-LM 0.00 0.00
SORA-TPP 0.00 0.00

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 36.56 0.03
/data 49,193.72 0.84
/ltmp 7,486.98 0.64

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 0.00 0.00

*1: Fraction of Usage in Total Resources: Weighted average of three resource types (Computing, File System, and Archiver).

*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.

JAXA Supercomputer System Annual Report April 2019-March 2020