Prediction of effective cohesive parameters for mode I failure behavior of LPBF Ti-6Al-4V/CFRTP interface using meso-scale modelling
บทความในวารสาร
ผู้เขียน/บรรณาธิการ
กลุ่มสาขาการวิจัยเชิงกลยุทธ์
รายละเอียดสำหรับงานพิมพ์
รายชื่อผู้แต่ง: Nusom Y., Srimanosaowapak S., Uthaisangsuk V.
ผู้เผยแพร่: Elsevier
ปีที่เผยแพร่ (ค.ศ.): 2024
วารสาร: Engineering Fracture Mechanics (0013-7944)
Volume number: 297
นอก: 0013-7944
eISSN: 1873-7315
ภาษา: English-Great Britain (EN-GB)
บทคัดย่อ
In this work, an approach using meso-scale RVEs was proposed to obtain cohesive parameters for mode I interfacial failure of bonding between Ti-6Al-4 V and CFRTP. Hereby, surface roughness of Ti64 sheets, which were produced by laser powder bed fusion (LPBF) technique, were varied due to different printing angles. RVE models consisted of three materials regions including metal, composite and interlayer. The unique LPBF built surface morphologies, which significantly affected interfacial contact areas and mechanical interlocking of the bonding, were incorporated along with a traction-separation law as interface between the metal and interlayer. From RVE simulations under mode I loading, cohesive stiffness, strength and fracture energy of examined interfaces could be determined. The predicted interface properties were validated using a double cantilever beam (DCB) test, in which results of experiments and macro-scale simulations were compared and a maximum error of 5.3 % was found. The cohesive parameters strongly depended on the surface roughness of Ti64 substrate so that the interfacial stiffness and strength were increased about 95.4 % and 106.5 %, respectively, when the roughness (Sa) of 22 μm was achieved. RVE results showed that both adhesive and cohesive failures could occur according to governing mechanical interlocks of the interface. The cohesive parameters of varying surface characteristics for a macroscopic simulation can be attained using the proposed framework. © 2024 Elsevier Ltd
คำสำคัญ
LPBF, Mechanical interlocking, Multi-materials interface
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