I am trying to obtain the nodal reaction force on a composite laminate due to an applied displacement over a number of load steps. The composite laminate has 24 laminas. The goal is to determine the reaction force of the constrained edge of the composite laminate at the onset of damage for a given load step and substep due to an applied displacement along the free edge of the laminate. I am simulating a simple tension test of a composite laminate, where SHELL281 elements are used for each lamina.<\/p>\n
The current approach is to list the all the nodes, and then find the node numbers at the constrained edge (x = 127 mm). Once these particular node numbers are found, the nodal loads for Fx are listed (List > Results > Nodal Loads > Fx). All of those nodal loads are then summed to obtain the nodal reaction force for each lamina (0, +-45, 90 degrees) at a particular load step and substep. Once all of the nodal reaction forces for all nodes at x = 127 mm for the 0, +-45, 90 degree laminas at a given load step and substep have been found, they are multiplied by 6 (4 different fiber orientations*6 laminas for each fiber orientation = 24 laminas) and summed to obtain the reaction force of the laminate at the constrained edge (x = 127 mm). The applied displacement is at x = 0 mm. The nodal reaction force values returned by ANSYS are negative, as one would expect. Is this approach correct to obtain the nodal reaction force of the laminate?<\/p>\n
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The concern is that once the nodal reaction forces are summed for all nodes at the constrained edge for all 24 laminas, the total nodal reaction force exceeds the strength of the laminate. Is it possible that PDA does not consider total failure of the laminate? I am using continuum damage mechanics (CDM) with progressive damage analysis (PDA).<\/p>\n
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Also, the node numbers at the constrained edge (x = 127 mm) are the same for each of the laminas (0, +-45, and 90 degree fiber orientations). Does the nodal reaction force for a given lamina account for all the other laminas with the same fiber orientation? For example, does the nodal reaction force for the 0 degree lamina include the reaction force for all of the 0 degree laminas? If there are 6 laminas that have a 0 degree fiber orientation, is the nodal reaction force for a selected 0 degree lamina (ex. RSYS 11 for LAYER 1) a summation of all the 0 degree laminas in the composite?<\/p>\n
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Thank you so much!<\/p>\n","protected":false},"template":"","class_list":["post-344555","topic","type-topic","status-closed","hentry","topic-tag-ansys-mapdl-1","topic-tag-composite-analysis","topic-tag-composite-laminates-1","topic-tag-continuum","topic-tag-damage-1","topic-tag-force-displacement","topic-tag-force-reaction","topic-tag-nodal-force-2","topic-tag-progressive-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":["23.206.193.146"],"_bbp_subscription":["168490","23687"],"_btv_view_count":["2372"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["344555"],"_bbp_forum_id":["27791"],"_bbp_engagement":["23687","168490"],"_bbp_voice_count":["2"],"_bbp_reply_count":["6"],"_bbp_last_reply_id":["346026"],"_bbp_last_active_id":["346026"],"_bbp_last_active_time":["2024-01-22 23:00:39"]},"test":"mpirkle"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/344555","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":10,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/344555\/revisions"}],"predecessor-version":[{"id":344571,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/344555\/revisions\/344571"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=344555"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}