| Structural-Nanomechanical Property Correlation of Shallow Water Shrimp （Pandalus platyceros） Exoskeleton at Elevated Temperature |
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| 作者姓名： | Devendra Verma Vikas Tomar |
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| 作者单位： | School of Aeronautics and Astronautics, Purdue University, West Lafayette, IN 47907, USA |
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| 基金项目： | Acknowledgment Authors would like to thank Dr Ming Gan for help with the nanoindentation. Also, authors would like to acknowledge the excellent technical assistance of Dr. Christopher J. Gilpin, Chia-Ping Huang and Laurie Mueller with the SEM. Authors also acknowledge support from the National science Foundation Grant CMMI1131112 （Program Manager： Dr. Dennis Carter）. |
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| 摘 要： | This investigation reports the nanomechanical properties of shallow water shrimp exoskeleton at temperatures ranging from 30 ℃ to 80 ℃ measured using nanoindentation experiments. Scanning Electron Microscopy （SEM） measurements suggest that the shrimp exoskeleton has the Bouligand structure in its layers, a key characteristic of the crustaceans. The thickness of the layers and packing density are found to be different from that of lobsters and crabs reported earlier in the literature. Mechanical properties at high temperatures are determined using micro materials nanoindentation test set up combined with the hot stage. The properties measured during nanoindentation test are corrected for the creep and thermal drift during the experiments. The reduced modulus values are found to be around 28 GPa at 30 ℃ that reduces to approximately 24 GPa at 80 ℃. The hardness values also decrease from 1.6 GPa at 30 ℃ to around 1.2 GPa at 80 ℃. The indentation size effect is found to be absent at all temperatures. Creep mechanisms of polymers like materials and its temperature dependence are discussed to give more insight into the deformation mechanism.
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| 关 键 词： | 纳米力学性能 骨骼结构 机械性能 龙虾 浅水 高温 扫描电子显微镜 压痕尺寸效应 |
Structural-Nanomechanical Property Correlation of Shallow Water Shrimp （Pandalus platyceros） Exoskeleton at Elevated Temperature |
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| Devendra Verma Vikas Tomar.Structural-Nanomechanical Property Correlation of Shallow Water Shrimp （Pandalus platyceros） Exoskeleton at Elevated Temperature[J].Journal of Bionics Engineering,2014,11(3):360-370. |
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| Institution: | 1. Faculty of Maritime Technology and Operations, Aalesund University College, Aalesund, 6009, Norway;2. Department of Computer Science, University of Hamburg, Hamburg, 22527 Germany;1. Norwegian Institute for Water Research (NIVA), Thormøhlensgate 53 D, 5006 Bergen, Norway;2. Faculty of Biosciences and Aquaculture, University of Nordland, Bodø 8049, Norway;3. Norwegian Veterinary Institute, 9480 Harstad, Norway;4. Department of Immunology and Microbiology, University of Southern Denmark, Odense C, Denmark;5. Freidrich Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Immunology, Germany;6. Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen AB24 2TZ, UK;7. Department of Pathology and Microbiology, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown PE C1A 4P3, Canada;1. IBB – Institute for Biotechnology and Bioengineering, Centre for Biological and Chemical Engineering, Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;2. IN+ – Center for Innovation, Technology and Policy Research, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal |
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| Abstract: | This investigation reports the nanomechanical properties of shallow water shrimp exoskeleton at temperatures ranging from 30 °C to 80 °C measured using nanoindentation experiments. Scanning Electron Microscopy (SEM) measurements suggest that the shrimp exoskeleton has the Bouligand structure in its layers, a key characteristic of the crustaceans. The thickness of the layers and packing density are found to be different from that of lobsters and crabs reported earlier in the literature. Mechanical properties at high temperatures are determined using micro materials nanoindentation test set up combined with the hot stage. The properties measured during nanoindentation test are corrected for the creep and thermal drift during the experiments. The reduced modulus values are found to be around 28 GPa at 30 °C that reduces to approximately 24 GPa at 80 °C. The hardness values also decrease from 1.6 GPa at 30 °C to around 1.2 GPa at 80 °C. The indentation size effect is found to be absent at all temperatures. Creep mechanisms of polymers like materials and its temperature dependence are discussed to give more insight into the deformation mechanism. |
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| Keywords: | fresh water shrimp nanomechanics temperature dependence creep mechanism |
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