{"id":195517,"date":"2021-11-01T17:36:12","date_gmt":"2021-11-01T17:36:12","guid":{"rendered":"\/forum\/forums\/reply\/195517\/"},"modified":"2021-11-01T17:36:12","modified_gmt":"2021-11-01T17:36:12","slug":"195517","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/195517\/","title":{"rendered":"Reply To: How to decrease the run time for an SPH analysis in LS-DYNA."},"content":{"rendered":"<p>100,000 seconds = 28 hours.   I don&#8217;t think you mentioned the explicit time step size, but forget about running for 100,000 seconds as a means of circumventing the warnings as that would likely entail running billions of time steps.  If your material misbehaves when using a reasonable loading rate (run duration of no more than 1 to 10 seconds, for instance), the trouble is almost assuredly bad input.  Check and recheck your units.   All your input must use a consistent unit system.   <br \/>\nAlso, run a double precision executable of LS-DYNA and use a recently released version and not one that is several years old.<br \/>\nIf you get stuck, create a one-element model using your mat 107 input and run some trials.   That may cast some light on things.<\/p>\n","protected":false},"template":"","class_list":["post-195517","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"100,000 seconds = 28 hours. I don&#039;t think you mentioned the explicit time step size, but forget about running for 100,000 seconds as a means of circumventing the warnings as that would likely entail running billions of time steps. If your material misbehaves when using a reasonable loading rate (run duration of no more than\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/195517\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Reply To: How to decrease the run time for an SPH analysis in LS-DYNA. | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"100,000 seconds = 28 hours. I don&#039;t think you mentioned the explicit time step size, but forget about running for 100,000 seconds as a means of circumventing the warnings as that would likely entail running billions of time steps. If your material misbehaves when using a reasonable loading rate (run duration of no more than\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/195517\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2021-11-01T17:36:12+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2021-11-01T17:36:12+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Reply To: How to decrease the run time for an SPH analysis in LS-DYNA. | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"100,000 seconds = 28 hours. I don&#039;t think you mentioned the explicit time step size, but forget about running for 100,000 seconds as a means of circumventing the warnings as that would likely entail running billions of time steps. If your material misbehaves when using a reasonable loading rate (run duration of no more than\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/195517\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/195517\\\/#listItem\",\"name\":\"Reply To: How to decrease the run time for an SPH analysis in LS-DYNA.\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/195517\\\/#listItem\",\"position\":2,\"name\":\"Reply To: How to decrease the run time for an SPH analysis in LS-DYNA.\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/195517\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/195517\\\/\",\"name\":\"Reply To: How to decrease the run time for an SPH analysis in LS-DYNA. | Ansys Learning Forum\",\"description\":\"100,000 seconds = 28 hours. I don't think you mentioned the explicit time step size, but forget about running for 100,000 seconds as a means of circumventing the warnings as that would likely entail running billions of time steps. If your material misbehaves when using a reasonable loading rate (run duration of no more than\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/195517\\\/#breadcrumblist\"},\"datePublished\":\"2021-11-01T17:36:12+00:00\",\"dateModified\":\"2021-11-01T17:36:12+00:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"inLanguage\":\"en-US\",\"publisher\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"Reply To: How to decrease the run time for an SPH analysis in LS-DYNA. | Ansys Learning Forum","description":"100,000 seconds = 28 hours. I don't think you mentioned the explicit time step size, but forget about running for 100,000 seconds as a means of circumventing the warnings as that would likely entail running billions of time steps. If your material misbehaves when using a reasonable loading rate (run duration of no more than","canonical_url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/195517\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/195517\/#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","position":1,"name":"Home","item":"https:\/\/innovationspace.ansys.com\/forum","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/195517\/#listItem","name":"Reply To: How to decrease the run time for an SPH analysis in LS-DYNA."}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/195517\/#listItem","position":2,"name":"Reply To: How to decrease the run time for an SPH analysis in LS-DYNA.","previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","name":"Home"}}]},{"@type":"Organization","@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization","name":"Ansys Learning Forum","description":"Ansys Innovation Space","url":"https:\/\/innovationspace.ansys.com\/forum\/"},{"@type":"WebPage","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/195517\/#webpage","url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/195517\/","name":"Reply To: How to decrease the run time for an SPH analysis in LS-DYNA. | Ansys Learning Forum","description":"100,000 seconds = 28 hours. I don't think you mentioned the explicit time step size, but forget about running for 100,000 seconds as a means of circumventing the warnings as that would likely entail running billions of time steps. If your material misbehaves when using a reasonable loading rate (run duration of no more than","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/195517\/#breadcrumblist"},"datePublished":"2021-11-01T17:36:12+00:00","dateModified":"2021-11-01T17:36:12+00:00"},{"@type":"WebSite","@id":"https:\/\/innovationspace.ansys.com\/forum\/#website","url":"https:\/\/innovationspace.ansys.com\/forum\/","name":"Ansys Learning Forum","description":"Ansys Innovation Space","inLanguage":"en-US","publisher":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization"}}]},"og:locale":"en_US","og:site_name":"Ansys Learning Forum | Ansys Innovation Space","og:type":"article","og:title":"Reply To: How to decrease the run time for an SPH analysis in LS-DYNA. | Ansys Learning Forum","og:description":"100,000 seconds = 28 hours. I don't think you mentioned the explicit time step size, but forget about running for 100,000 seconds as a means of circumventing the warnings as that would likely entail running billions of time steps. If your material misbehaves when using a reasonable loading rate (run duration of no more than","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/195517\/","article:published_time":"2021-11-01T17:36:12+00:00","article:modified_time":"2021-11-01T17:36:12+00:00","twitter:card":"summary_large_image","twitter:title":"Reply To: How to decrease the run time for an SPH analysis in LS-DYNA. | Ansys Learning Forum","twitter:description":"100,000 seconds = 28 hours. I don't think you mentioned the explicit time step size, but forget about running for 100,000 seconds as a means of circumventing the warnings as that would likely entail running billions of time steps. If your material misbehaves when using a reasonable loading rate (run duration of no more than"},"aioseo_meta_data":{"post_id":"195517","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"content","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":true,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"limit_modified_date":false,"created":"2024-10-25 01:53:41","updated":"2026-08-12 17:20:29","ai":null,"breadcrumb_settings":null,"seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tReply To: How to decrease the run time for an SPH analysis in LS-DYNA.\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/innovationspace.ansys.com\/forum"},{"label":"Reply To: How to decrease the run time for an SPH analysis in LS-DYNA.","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/195517\/"}],"acf":[],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/195517","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/reply"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/195517\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=195517"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}