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Nano-Energetic Materials pp 275–290Cite as

Interface Mechanical Properties in Energetic Materials Using Nanoscale Impact Experiment and Nanomechanical Raman Spectroscopy

Part of the Energy, Environment, and Sustainability book series (ENENSU)

Abstract

Energetic materials are sensitive to mechanical shock and defects caused by a high-velocity impact may result in unwanted detonation due to hot-spot formation. In order to understand the underlying mechanism, characterization of high strain-rate mechanical properties needs to be studied. One of the key factors that can contribute to this type of defect is the failure initiated at the interfaces such as those between Hydroxyl-terminated polybutadiene (HTPB) and Cyclo-tetra-methylene-tetra-nitramine (HMX) (or HTPB and Ammonium Perchlorate (AP)). In this work, interface mechanical properties of HTPB-HMX and HTPB-AP interfaces are characterized using nanoscale dynamic impact experiments at strain rates up to 100 s−1. The binding agent was added to the mixture in order to analyze the effect of chemical composition on the interfacial mechanical properties. For HTPB-AP sample, Tepanol is used as the binding agent and for HTPB-HMX sample, Dantocol was used as the binding agent. The impact response is determined in the bulk HTPB, HMX, and AP as well as at the HTPB-HMX and HTPB-AP interfaces. A strain-rate-dependent viscoplastic power law-based constitutive model was obtained by fitting the experimental stress–strain–strain-rate data. The effect of binding agent on interface level failure properties was studied using an in situ nanomechanical Raman spectroscopy (NMRS) setup.

Keywords

  • Energetic material
  • MRS
  • HTPB
  • HMX
  • AP

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Fig. 13.1

Reprinted with permission from Prakash et al. (2017). Copyright (2018) Springer Nature

Fig. 13.2

Reprinted with permission from Prakash et al. (2018a). Copyright (2018) Elsevier and comparison with the data obtained by Cady et al. (2006) using SHPB test

Fig. 13.3

Reprinted with permission from Olokun et al. (2018). Copyright (2018) Springer Nature

Fig. 13.4

Reprinted with permission from Prakash et al. (2018). Copyright (2018) Elsevier

Fig. 13.5

Reprinted with permission from Prakash et al. (2018a). Copyright (2018) Elsevier

Fig. 13.6

Reprinted with permission from Prakash et al. (2018a). Copyright (2018) Elsevier

Fig. 13.7

Reprinted with permission from Prakash et al. (2018a). Copyright (2018) Elsevier and c HTPB-HMX-Dantocol sample

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Acknowledgements

This research was supported by US-AFoSR Grant FA9550-15-1-0202 (Program Manager Dr. Martin Schmidt).

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Authors and Affiliations

  1. School of Aeronautics and Astronautics, Purdue University, West Lafayette, IN, 47907, USA

    Chandra Prakash, Ayotomi Olokun & Vikas Tomar

  2. School of Mechanical Engineering, Purdue University, West Lafayette, IN, 47907, USA

    I. Emre Gunduz

Authors
  1. Chandra Prakash
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  2. Ayotomi Olokun
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  3. I. Emre Gunduz
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  4. Vikas Tomar
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Corresponding author

Correspondence to Vikas Tomar .

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Editors and Affiliations

  1. Department of Mechanical Engineering, Indian Institute Of Technology Kanpur, Kanpur, Uttar Pradesh, India

    Prof. Shantanu Bhattacharya

  2. Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India

    Dr. Avinash Kumar Agarwal

  3. Department of Mechanical Engineering, Amrita School of Engineering, Coimbatore, Tamil Nadu, India

    Prof. T. Rajagopalan

  4. Department of Mechanical Engineering, Govind Ballah Pant Institute of Engineering and Technology, Pauri, Uttarakhand, India

    Prof. Vinay K. Patel

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Prakash, C., Olokun, A., Emre Gunduz, I., Tomar, V. (2019). Interface Mechanical Properties in Energetic Materials Using Nanoscale Impact Experiment and Nanomechanical Raman Spectroscopy. In: Bhattacharya, S., Agarwal, A., Rajagopalan, T., Patel, V. (eds) Nano-Energetic Materials. Energy, Environment, and Sustainability. Springer, Singapore. https://doi.org/10.1007/978-981-13-3269-2_13

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