JAXA Supercomputer System Annual Report April 2017-March 2018

Report Number: R17ECMP99

Subject Category: Competitive Funding

PDF available here

• Responsible Representative: Yutaka Iwahori, Aeronautical Directorate, Structure and Advanced Composite Technology Reasearch Unit
• Contact Information: Akinori Yoshimura yoshimura.akinori@jaxa.jp
• Members: Akinori Yoshimura

Abstract

JAXA contributes to the SIP (Cross-ministerial Strategic Innovation Promotion) program, which is governed by Cabinet Office, Government of Japan. JAXA takes charge high fidelity modeling of the polymer matrix composites for aircraft structure. The calculation for the modeling is performed in this topic.

Reference URL

Please refer to http://www.jst.go.jp/sip/dl/k03/jst_pamphlet_english.pdf .

Reasons for using JSS2

Damage simulation of the open hole tensile (OHT) test against CFRP was performed using explicit finite element damage simulation. Huge number of DOFs was necessary for detailed damage simulation in CFRP. Application of the supercomputer system makes such high-computational-cost calculation possible.

Achievements of the Year

Damage simulation of CFRP under open-hole tensile (OHT) test was performed using ECDM (Enhanced Continuum Damage Mechanics) model, which was damage model developed in JAXA.

Simulation was performed using ABAQUS/Explicit 2016 on JSS2 system. Each ply of the CFRP laminate was modeled by one continuum shell element in the thickness direction. ECDM model was implemented using user-subroutine of ABAQUS. In FY29, ECDM model was modified and final failure criteria was modified. These modification improved the precision of the simulation results.

Figure 1 shows model overview, and Figure 2 shows the predicted damage.

Fig.1: Model overview of the Open-hole-tension simulation

Fig.2: Predicted damage

Publications

N/A

Usage of JSS2

Computational Information

• Process Parallelization Methods: MPI
• Thread Parallelization Methods: N/A
• Number of Processes: 12 - 120
• Elapsed Time per Case: 60.00 hours

Resources Used

Fraction of Usage in Total Resources*1(%): 0.00

Details

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

*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 2017-March 2018