{"id":32033,"date":"2018-12-09T10:01:37","date_gmt":"2018-12-09T10:01:37","guid":{"rendered":"\/forum\/forums\/topic\/blast-simulation-in-explicit-dynamics\/"},"modified":"2018-12-09T10:01:37","modified_gmt":"2018-12-09T10:01:37","slug":"blast-simulation-in-explicit-dynamics","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/blast-simulation-in-explicit-dynamics\/","title":{"rendered":"Blast Simulation in explicit dynamics"},"content":{"rendered":"

Hi  Ansys Community <\/p>\n

<\/p>\n

I am trying to run a non-linear analysis for a precast Concrete Hollow Core Slab “HCS” with topping subjected to blast loading “pressure” in ansys workbench explicit dynamics. the purpose is to determine the optimal topping thickness that could withstand the blast with some failure criteria. the model is prepared in space-claim (Line”beam” elements for Strands and topping reinf.” and solid elements for concrete and supports).  I used symmetry by modeling only one quartet of the HCS. CONC-35MPa material is used to model the concrete and structural steel is used to model the strands and topping reinf. Any Help or suggestion with the following will be highly appreciated.<\/span><\/p>\n

<\/p>\n

\"Space-Claim<\/p>\n

<\/p>\n

* Version used: Ansys Workbench 19.2<\/span><\/p>\n

<\/p>\n

2. How to Apply the following<\/span><\/p>\n

<\/p>\n

a. the pre-stressing force on the strands in an explicit dynamic analysis “Prestressing-longer term event, followed by a blast Pressures-short term event. Any Initial Conditions required??<\/span><\/p>\n

<\/p>\n

b. How to apply the blast pressure?? Directly on the slab surface. when to use the blast load by the means of a detonation point with TNT material specified in the engineering data. <\/span><\/p>\n

<\/p>\n

4. Which material model better simulates the concrete in this case “Blast” (RHT Concrete strenght\/CONC-35MPa or another concrete model may be more suitable).<\/span><\/p>\n

<\/p>\n

5. With an end time of 0.005 the full simulation solution is reached. “What is the rule of thump for calculating a suitable end time for the blast”??<\/span><\/p>\n

<\/p>\n

The attached file include all the snaps of the model.<\/span><\/p>\n

<\/p>\n

thanks in advance      <\/p>\n","protected":false},"template":"","class_list":["post-32033","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["4205"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0","0","0","0","0"],"_btv_view_count":["2819"],"_bbp_subscription":["237133"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["32033"],"_bbp_forum_id":["27791"],"_bbp_engagement":["68","158970","164526"],"_bbp_voice_count":["3"],"_bbp_reply_count":["4"],"_bbp_last_reply_id":["98965"],"_bbp_last_active_id":["98965"],"_bbp_last_active_time":["2019-11-22 14:53:44"]},"test":"mirghani"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/32033","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\/32033\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=32033"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}