TY - RPRT TI - Instabilities and phase transitions in architected metamaterials: a gradient-enhanced continuum approach AU - Joshi, Sarvesh [Cornell Univ., Ithaca, NY (United States)] (ORCID:0000000270186141) AU - Mousavi, S. Mohammad [Cornell Univ., Ithaca, NY (United States)] (ORCID:000000018980845X) AU - Hamel, Craig M. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)] (ORCID:0000000340869010) AU - Gaitanaros, Stavros [Technical Univ. of Denmark, Ballerup (Denmark)] (ORCID:0000000240623195) AU - Purohit, Prashant K. [Univ. of Pennsylvania, Philadelphia, PA (United States)] (ORCID:000000021939907X) AU - Alberdi, Ryan [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)] (ORCID:000000025836948X) AU - Bouklas, Nikolaos [Cornell Univ., Ithaca, NY (United States); Pasteur Labs, Brooklyn, NY (United States)] (ORCID:0000000233495914) PY - 2026 DO - 10.1016/j.cma.2025.118719 UR - https://www.osti.gov/biblio/3030900 ID - 3030900 ER -