PMID- 34771788
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20211118
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 14
IP  - 21
DP  - 2021 Oct 21
TI  - Double-Level Energy Absorption of 3D Printed TPMS Cellular Structures via Wall 
      Thickness Gradient Design.
LID - 10.3390/ma14216262 [doi]
LID - 6262
AB  - This paper investigates the deformation mechanism and energy absorption behaviour 
      of 316 L triply periodic minimal surface (TPMS) structures with uniform and 
      graded wall thicknesses fabricated by the selective laser melting technique. The 
      uniform P-surface TPMS structure presents a single-level stress plateau for 
      energy absorption and a localized diagonal shear cell failure. A graded strategy 
      was employed to break such localized geometrical deformation to improve the 
      overall energy absorption and to provide a double-level function. Two segments 
      with different wall thicknesses separated by a barrier layer were designed along 
      the compression direction while keeping the same relative density as the uniform 
      structure. The results show that the crushing of the cells of the graded 
      P-surface TPMS structure occurs first within the thin segment and then propagates 
      to the thick segment. The stress-strain response shows apparent double stress 
      plateaus. The stress level and length of each plateau can be adjusted by changing 
      the wall thickness and position of the barrier layer between the two segments. 
      The total energy absorption of the gradient TPMS structure was also found 
      slightly higher than that of the uniform TPMS counterparts. The gradient design 
      of TPMS structures may find applications where the energy absorption requires a 
      double-level feature or a warning function.
FAU - Zhong, Minting
AU  - Zhong M
AD  - School of Civil Engineering, Guangzhou University, Guangzhou 510006, China.
FAU - Zhou, Wei
AU  - Zhou W
AD  - School of Civil Engineering, Guangzhou University, Guangzhou 510006, China.
FAU - Xi, Huifeng
AU  - Xi H
AD  - MOE Key Laboratory of Disaster Forecast and Control in Engineering, School of 
      Mechanics and Construction Engineering, Jinan University, Guangzhou 510632, 
      China.
FAU - Liang, Yingjing
AU  - Liang Y
AD  - School of Civil Engineering, Guangzhou University, Guangzhou 510006, China.
FAU - Wu, Zhigang
AU  - Wu Z
AUID- ORCID: 0000-0001-8651-5651
AD  - School of Civil Engineering, Guangzhou University, Guangzhou 510006, China.
LA  - eng
GR  - 2018A030313742 and 2020A1515011064/Natural Science Foundation of Guangdong 
      Province/
GR  - 2019GDJC-M43 and 2020GDJC-M43/Guangzhou University Postgraduate Innovation 
      Ability Training Funding Program/
GR  - Grant No. SV2018-KF-32/the State Key Laboratory for Strength and Vibration of 
      Mechanical Structures of Xi'an Jiaotong University/
GR  - RQ2021016/the Hundred Talents Program of Guangzhou University/
PT  - Journal Article
DEP - 20211021
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC8584746
OTO - NOTNLM
OT  - 316 L stainless steel
OT  - deformation mechanism
OT  - energy absorption
OT  - selective laser melting
OT  - triply periodic minimal surface
COIS- The authors declare no conflict of interest.
EDAT- 2021/11/14 06:00
MHDA- 2021/11/14 06:01
PMCR- 2021/10/21
CRDT- 2021/11/13 01:15
PHST- 2021/09/17 00:00 [received]
PHST- 2021/10/15 00:00 [revised]
PHST- 2021/10/18 00:00 [accepted]
PHST- 2021/11/13 01:15 [entrez]
PHST- 2021/11/14 06:00 [pubmed]
PHST- 2021/11/14 06:01 [medline]
PHST- 2021/10/21 00:00 [pmc-release]
AID - ma14216262 [pii]
AID - materials-14-06262 [pii]
AID - 10.3390/ma14216262 [doi]
PST - epublish
SO  - Materials (Basel). 2021 Oct 21;14(21):6262. doi: 10.3390/ma14216262.