{"id":438420,"date":"2025-08-02T13:14:38","date_gmt":"2025-08-02T13:14:38","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/composite-validation\/"},"modified":"2025-08-02T13:14:38","modified_gmt":"2025-08-02T13:14:38","slug":"composite-validation","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/composite-validation\/","title":{"rendered":"Composite Validation"},"content":{"rendered":"<p>&lt;p&gt;Hi everyone,&lt;\/p&gt;&lt;p&gt;I am facing a problem in validating the composite model for high velocity impacts. My simulations are underpredicting the value. The velocity drop I am getting is significantly lower compared to the existing literature. I have used solid (MAT_59) and shell (MAT_54) elements with quater model. SPC node set boundary onditions were provided with x (1 0 0 0 1 1) and y (0 1 0 1 0 1) symmetry. EFFEPS and VOLEPS is set for solid elements as erosion criteria. For shell, DFAILM, DFAILT, DFAILC, DFAILS are taken as failure criteria.&nbsp;&lt;\/p&gt;&lt;p&gt;Eroding surface to surface contact is used between projectile and target whereas automatic surface to surface tiebreak contact is used for contacts between layers with option 4 for both the models. Soft constraint is used (SOFT=1). I can provide the material properties if needed.&nbsp;&lt;\/p&gt;&lt;p&gt;Please guide me where I am making a mistake.&lt;\/p&gt;&lt;p&gt;Thankyou&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-438420","topic","type-topic","status-publish","hentry","topic-tag-composite","topic-tag-composite-analysis","topic-tag-composite-laminates-1","topic-tag-composite-modeling","topic-tag-composite-preppost"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27814"],"_bbp_topic_id":["438420"],"_bbp_subscription":["492369","480261"],"_bbp_author_ip":["103.144.92.129"],"_bbp_last_reply_id":["438684"],"_bbp_last_active_id":["438684"],"_bbp_last_active_time":["2025-08-06 06:55:02"],"_bbp_reply_count":["2"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["492369","480261"],"_btv_view_count":["208"],"_bbp_topic_status":["unanswered"]},"test":"b280cd373caf16321d8e711c23564ecdaa37144f"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/438420","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":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/438420\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=438420"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}