{"id":504,"date":"2018-06-18T10:46:09","date_gmt":"2018-06-18T15:46:09","guid":{"rendered":"http:\/\/my.vanderbilt.edu\/cpml\/?page_id=504"},"modified":"2024-01-17T22:05:49","modified_gmt":"2024-01-18T03:05:49","slug":"onr-n0014-17-12040","status":"publish","type":"page","link":"https:\/\/my.vanderbilt.edu\/cpml\/research\/onr-n0014-17-12040\/","title":{"rendered":"ONR N0014-17-12040 &#8211; Multiscale Modeling of Composites Subjected to Fatigue Loading"},"content":{"rendered":"<h2><strong>Overview<\/strong><\/h2>\n<p>The overall goals of this research are to establish a multiscale computational framework for the prediction of long-term performance of aerospace composites, and to gain fundamental understanding of the interactions between failure mechanisms under cyclic loading. In order to achieve this goal, the specific objectives of the program are:<\/p>\n<ul>\n<li>Devise an efficient and accurate space-time multiscale computational framework for fatigue life prediction of composites, that achieves stable and mesh-independent damage propagation modeling, and also accounts for the interactions between all relevant damage mechanisms throughout the loading process (Lead: Prof. Caglar\u00a0Oskay);<\/li>\n<li>Establish and model the interlaminar degradation and fracture propagation mechanisms under fatigue loading, with particular emphasis on stability and accuracy of the underlying finite element formulation of cohesive zone models (Lead: Prof. Ravindra Duddu);<\/li>\n<li>Gain a fundamental understanding of the interactions between damage modes under fatigue, which includes performing experimentally-validated numerical simulations, detailed analysis of the coupling between delamination, matrix cracking and fiber fracture, and characterization of the effects of damage interactions on the overall fatigue life (Lead: Prof. Caglar\u00a0Oskay).<\/li>\n<\/ul>\n<h2><b>Publications<\/b><\/h2>\n<p>Ghosh, G., Duddu, R., &amp; Annavarapu, C. (2021). On the robustness of the stabilized finite element method for delamination analysis of composites using cohesive elements.\u00a0<i>International Journal for Computational Methods in Engineering Science and Mechanics<\/i>,\u00a0<i>22<\/i>(6), 538-558.\u00a0(<a style=\"color: #ff0000\" href=\"https:\/\/doi.org\/10.1080\/15502287.2021.1896607\">link<\/a>)<\/p>\n<p>Ghosh, G., Duddu, R., &amp; Annavarapu, C. (2020). A stabilized finite element method for delamination analysis of composites using cohesive elements.\u00a0<i>arXiv preprint arXiv:2008.09015<\/i>.\u00a0(<a style=\"color: #ff0000\" href=\"https:\/\/arxiv.org\/abs\/2008.09015\">link<\/a>)<\/p>\n<p>G. Ghosh, R. Duddu and C. Annavarapu, A stabilized finite element\u00a0method for enforcing stiff anisotropic cohesive laws using interface elements,\u00a0Computer Methods\u00a0in Applied Mechanics and Engineering,\u00a0348: 1013-1038, 2019, doi:\u00a010.1016\/j.cma.2019.02.007\u00a0<span style=\"color: #ff0000\">(<a style=\"color: #ff0000\" href=\"https:\/\/doi.org\/10.1016\/j.cma.2019.02.007\">link<\/a>)<\/span><\/p>\n<p>G. Ghosh, C. Annavarapu, R. Duddu, \u201cA stabilized finite element formulation remedying traction oscillations in cohesive interface elements\u201d Proceedings of the American Society for Composites: Thirty-third\u00a0Technical Conference, pp. 14, \u00a0University of Washington, Seattle, Washington, September\u00a024\u201326, 2018\u00a0<span style=\"color: #ff0000\"><a style=\"color: #ff0000\" href=\"https:\/\/cdn.vanderbilt.edu\/t2-my\/my-prd\/wp-content\/uploads\/sites\/754\/2018\/10\/StabilizedCZM_ASC2018.pdf\">pdf<\/a><\/span><\/p>\n<p>G. Ghosh, C. Annavarapu, S. Jimenez, R. Duddu, &#8220;A stabilized finite element method for modeling mixed-mode delamination of composites&#8221; Proceedings of the American Society for Composites: Thirty-Second Technical Conference, pp. 16, Purdue University, West Lafayette, Indiana, October 23&#8211;25, 2017, doi:\u00a010.12783\/asc2017\/15360\u00a0<a href=\"https:\/\/cdn.vanderbilt.edu\/t2-my\/my-prd\/wp-content\/uploads\/sites\/754\/2017\/07\/ASC2017NitscheDraftV2.pdf\"><span style=\"color: #ff0000\">pdf<\/span><\/a><\/p>\n<h2><b>Students<\/b><\/h2>\n<table border=\"1\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td valign=\"top\" width=\"175\"><a href=\"https:\/\/cdn.vanderbilt.edu\/t2-my\/my-prd\/wp-content\/uploads\/sites\/754\/2015\/09\/1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-304 \" src=\"https:\/\/cdn.vanderbilt.edu\/t2-my\/my-prd\/wp-content\/uploads\/sites\/754\/2015\/09\/1-150x150.jpg\" width=\"154\" height=\"154\" srcset=\"https:\/\/cdn.vanderbilt.edu\/t2-my\/my-prd\/wp-content\/uploads\/sites\/754\/2015\/09\/1-150x150.jpg 150w, https:\/\/cdn.vanderbilt.edu\/t2-my\/my-prd\/wp-content\/uploads\/sites\/754\/2015\/09\/1-298x300.jpg 298w, https:\/\/cdn.vanderbilt.edu\/t2-my\/my-prd\/wp-content\/uploads\/sites\/754\/2015\/09\/1-647x650.jpg 647w, https:\/\/cdn.vanderbilt.edu\/t2-my\/my-prd\/wp-content\/uploads\/sites\/754\/2015\/09\/1.jpg 1109w\" sizes=\"auto, (max-width: 154px) 100vw, 154px\" \/><\/a><\/td>\n<td valign=\"top\">\n<h4><strong><span style=\"color: #000000\">Gourab Ghosh<\/span><\/strong><\/h4>\n<p><span style=\"color: #000000\">Ph. D. student, Expected Graduation: February 2020<\/span><\/p>\n<p><span style=\"color: #000000\">Research\u00a0project: Stabilized finite element method for enforcing stiff cohesive laws to simulate static and fatigue delamination.\u00a0<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table border=\"1\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td valign=\"top\" width=\"175\"><a href=\"https:\/\/cdn.vanderbilt.edu\/t2-my\/my-prd\/wp-content\/uploads\/sites\/754\/2013\/08\/Stephen_Jimenez1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-137\" src=\"https:\/\/cdn.vanderbilt.edu\/t2-my\/my-prd\/wp-content\/uploads\/sites\/754\/2013\/08\/Stephen_Jimenez1-150x150.jpg\" alt=\"\" width=\"150\" height=\"150\" \/><\/a><\/td>\n<td valign=\"top\">\n<h4><strong><span style=\"color: #000000\">Stephen Jimenez<\/span><\/strong><\/h4>\n<p><span style=\"color: #000000\">Ph. D., Graduated: December\u00a02017<\/span><\/p>\n<p><span style=\"color: #000000\">Research\u00a0project:\u00a0Parametrically insensitivity cycle-based\u00a0fatigue delamination models<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>Overview The overall goals of this research are to establish a multiscale computational framework for the prediction of long-term performance of aerospace composites, and to gain fundamental understanding of the interactions between failure mechanisms under cyclic loading. In order to achieve this goal, the specific objectives of the program are: Devise an efficient and accurate&#8230;<\/p>\n","protected":false},"author":1249,"featured_media":0,"parent":65,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"tags":[],"class_list":["post-504","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/my.vanderbilt.edu\/cpml\/wp-json\/wp\/v2\/pages\/504","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/my.vanderbilt.edu\/cpml\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/my.vanderbilt.edu\/cpml\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/my.vanderbilt.edu\/cpml\/wp-json\/wp\/v2\/users\/1249"}],"replies":[{"embeddable":true,"href":"https:\/\/my.vanderbilt.edu\/cpml\/wp-json\/wp\/v2\/comments?post=504"}],"version-history":[{"count":10,"href":"https:\/\/my.vanderbilt.edu\/cpml\/wp-json\/wp\/v2\/pages\/504\/revisions"}],"predecessor-version":[{"id":684,"href":"https:\/\/my.vanderbilt.edu\/cpml\/wp-json\/wp\/v2\/pages\/504\/revisions\/684"}],"up":[{"embeddable":true,"href":"https:\/\/my.vanderbilt.edu\/cpml\/wp-json\/wp\/v2\/pages\/65"}],"wp:attachment":[{"href":"https:\/\/my.vanderbilt.edu\/cpml\/wp-json\/wp\/v2\/media?parent=504"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/my.vanderbilt.edu\/cpml\/wp-json\/wp\/v2\/tags?post=504"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}