{"id":370917,"date":"2024-07-08T03:33:12","date_gmt":"2024-07-08T03:33:12","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/composite-damage-nodal-reaction-force-vs-displacement-graph\/"},"modified":"2024-07-15T12:06:30","modified_gmt":"2024-07-15T12:06:30","slug":"composite-damage-nodal-reaction-force-vs-displacement-graph","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/composite-damage-nodal-reaction-force-vs-displacement-graph\/","title":{"rendered":"Composite Damage – Nodal Reaction Force vs. Displacement Graph"},"content":{"rendered":"

I am trying to create a nodal reaction force versus displacement for a composite laminate subjected to an applied displacement over a given length of time. The composite coupon is constrained at one end with an applied displacement at the other end, as in a tension test. SHELL281 elements are <\/span>used<\/span>.<\/span> <\/span>T<\/span>he <\/span>laminate is symmetric about the midplane and has 24 laminas. I am using progressive damage with the Hashin criteria. The laminate has a hole in the center.<\/span><\/p>\n

 <\/p>\n

What I am hoping to see is the drop in nodal reaction force at different points in the displacement due to the various layers becoming damaged at different times. I would expect to see something like the graph below.<\/span><\/p>\n

 <\/p>\n

<\/a><\/span><\/p>\n

 <\/p>\n

Is this the code I should be using to generate such a graph? Is there a way to select all the nodes at the constained edge and plot them in one graph like the picture above? <\/span><\/p>\n

 <\/p>\n

 <\/p>\n

!PLOT NODAL REACTION FORCE VERSUS DISPLACEMENT AT NODE 5616<\/div>\n
 <\/div>\n
LAYERP26,1                                                                      !SELECT THE LAMINA<\/div>\n
SHELL,MID                                                                        !SELECT THE MIDDLE LAYER IN THE SHELL ELEMENT FOR RESULTS<\/div>\n
RFORCE,3,5616,F,X,FX NODE 5616                                !DEFINE VARIABLE #3 = X-DIRECTION REACTION FORCE AT NODE 5616<\/div>\n
NSOL,2,5616,U,X,UX                                                         !DEFINE VARIABLE #2 = X-DIRECTION DISPLACEMENT AT NODE 5616<\/div>\n
\/AXLAB,Y,REACTION FORCE [N]                                     !LABEL Y-AXIS AS “NODAL REACTION FORCE”<\/div>\n
\/AXLAB,X,DISPLACMENT [mm]                                        !LABEL X-AXIS AS “DISPLACEMENT”<\/div>\n
PLVAR,3                                                                             !PLOT VARIABLE #3 AS Y<\/div>\n
XVAR,2                                                                               !PLOT VARIABLE #2 AS X<\/div>\n

 <\/p>\n

 <\/p>\n

The node I chose is a node at the periphery of that hole that becomes damaged during the applied displacement. Is this a correct choice of node given what I am trying to do?<\/span><\/p>\n

 <\/p>\n

Should I be using a stress versus strain graph instead?<\/span><\/p>\n

 <\/p>\n

Thank you!<\/span><\/p>\n

 <\/p>\n","protected":false},"template":"","class_list":["post-370917","topic","type-topic","status-closed","hentry","topic-tag-composite-laminates-1","topic-tag-force-displacement"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_btv_view_count":["833"],"_bbp_topic_status":["unanswered"],"_edit_lock":["1721045163:15140"],"_bbp_subscription":["88"],"_bbp_topic_id":["370917"],"_bbp_forum_id":["27791"],"_bbp_engagement":["0","88"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["374430"],"_bbp_last_active_id":["374430"],"_bbp_last_active_time":["2024-07-31 10:02:46"]},"test":""}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/370917","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":1,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/370917\/revisions"}],"predecessor-version":[{"id":371898,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/370917\/revisions\/371898"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=370917"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}