Accepted Manuscript Effective in-plane elastic properties of auxetic honeycombs with spatial irregularity T. Mukhopadhyay, S. Adhikari PII: S0167-6636(16)00018-1 DOI: 10.1016/j.mechmat.2016.01.009 Reference: MECMAT 2542 To appear in: Mechanics of Materials Received date: 22 August 2015 Revised date: 15 December 2015 Accepted date: 19 January 2016 Please cite this article as: T. Mukhopadhyay, S. Adhikari, Effective in-plane elastic proper- ties of auxetic honeycombs with spatial irregularity, Mechanics of Materials (2016), doi: 10.1016/j.mechmat.2016.01.009 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.