PSI - Issue 14

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000

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ScienceDirect

Procedia Structural Integrity 14 (2019) 830–838

2nd International Conference on Structural Integrity and Exhibition 2018 Effect of Moisture on High Strain Rate Performance of UHMWPE Fiber Based Composite Hemant Chouhan a* , N. Asija a , A. Ahmed a , Kartikeya a , Naresh Bhatnagar a a Mechanical Engineering Department, Indian Institute of Technology Delhi, Hauz Khas, New Delhi -110016, India Abstract The presented study investigates the effect of moisture absorption on the compressive high strain rate performance of Ultra High Molecular Weight Polyethylene-Synthetic Rubber composite along the thickness direction. Split Hopkinson Pressure Bar is employed to investigate the dynamic compressive properties. The cylindrical test specimens were machined from flat composite laminate fabricated by compression molding. Two types of specimens were used for high strain rate testing. First set of specimen was oven dried at 65  C and second set was dipped in potable water as per NIJ standards. For identical incident energy, different strain rates and stresses were attained by the dry and wet composites, respectively. Impact loading of wet composite resulted in physically intact specimen at the lowest loading rate only; higher loading rates resulted in the macroscopic damage. Experimental results are presented as stress-strain–strain rate plots and a surface fitting approach is adopted to create a phenomenological model capable of describing the overall material response. © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 2nd International Conference on Structural Integrity and Exhibition 2018 Effect of Moisture on High Strain Rate Performance of UHMWPE Fiber Based Composite Hemant Chouhan a* , N. Asija a , A. Ahmed a , Kartikeya a , Naresh Bhatnagar a a Mechanical Engineering Department, Indian Institute of Technology Delhi, Hauz Khas, New Delhi -110016, India Abstract The presented study inv stigates the eff ct of moisture absorption on t e compres ive high strain rate performa ce of Ultra High Molecular Weight Polyethyle e-Synthetic Rubb r composite along the thickness direction. Split Hopkinson Pressure Bar is e ploy d to nv stigate the dynamic compressive propertie . The cylindrical test specimens we e machi ed f om flat composite laminat fabricated by compr ssion molding. Two types of specimens w e used for high strain rate test g. First s t of specimen was oven drie a 65  C and second set was dipped in po able water as per NIJ standards. For i e tical incident energy, diff rent strain rates and stresses were attained by the dry and wet composites, respectiv ly. Impact loading of wet co posite r sult d in physically intact specimen at the lowe loading rate only; highe loading rates resulted n the macroscopic damag . Experiment results re pr sent d as stress-strain–strain ate plots and a surface fitting approach is adopted to create a phenomenological model capable of describing the overall material response. © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND lic nse (https://creativecommons.org/licenses/by- c-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers.

Keywords: High strain rate loading; UHMWPE fiber; Synthetic rubber matrix; moisture; modelling Keywords: High strain rate loading; UHMWPE fiber; Synthetic rubber matrix; moisture; modelling

*Corresponding author. Tel.: +91 9650348501 E-mail address: hemant.chouhan78@gmail.com *Correspon ing author. Tel.: +91 9650348501 E-mail address: hemant.chouhan78@gmail.com

2452-3216 © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 2452-3216 © 2018 The Authors. Published by Elsevier B.V. This is a open access article und r the CC BY-NC-ND lic nse (https://creat vecommons.org/licenses/by- c-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers.

2452-3216  2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 10.1016/j.prostr.2019.07.061