{"id":165442,"date":"2023-03-17T09:00:18","date_gmt":"2023-03-17T09:00:18","guid":{"rendered":"\/knowledge\/forums\/topic\/do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time\/"},"modified":"2023-07-31T12:31:16","modified_gmt":"2023-07-31T12:31:16","slug":"do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time\/","title":{"rendered":"Do one need to curve fit if the data is available for relative moduli and relaxation time?"},"content":{"rendered":"<p>If one already have relative moduli and relaxation times that are verified to represent the material behavior, then you can just enter that directly without the need for curve fitting.  For experimentally measured relaxation data (stress vs time), one has to use the curve fitter to calculate relative moduli and relaxation times.<\/p>\n","protected":false},"template":"","class_list":["post-165442","topic","type-topic","status-publish","hentry","topic-tag-4391","topic-tag-materials","topic-tag-mechanical","topic-tag-plasticity","topic-tag-structural-mechanics"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"If one already have relative moduli and relaxation times that are verified to represent the material behavior, then you can just enter that directly without the need for curve fitting. For experimentally measured relaxation data (stress vs time), one has to use the curve fitter to calculate relative moduli and relaxation times.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time\/\" \/>\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 Knowledge | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Do one need to curve fit if the data is available for relative moduli and relaxation time? | Ansys Knowledge\" \/>\n\t\t<meta property=\"og:description\" content=\"If one already have relative moduli and relaxation times that are verified to represent the material behavior, then you can just enter that directly without the need for curve fitting. For experimentally measured relaxation data (stress vs time), one has to use the curve fitter to calculate relative moduli and relaxation times.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2023-03-17T09:00:18+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2023-07-31T12:31:16+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Do one need to curve fit if the data is available for relative moduli and relaxation time? | Ansys Knowledge\" \/>\n\t\t<meta name=\"twitter:description\" content=\"If one already have relative moduli and relaxation times that are verified to represent the material behavior, then you can just enter that directly without the need for curve fitting. For experimentally measured relaxation data (stress vs time), one has to use the curve fitter to calculate relative moduli and relaxation times.\" \/>\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\\\/knowledge\\\/forums\\\/topic\\\/do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/topics\\\/#listItem\",\"position\":2,\"name\":\"Topics\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/topics\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic-tag\\\/structural-mechanics\\\/#listItem\",\"name\":\"structural-mechanics\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic-tag\\\/structural-mechanics\\\/#listItem\",\"position\":3,\"name\":\"structural-mechanics\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic-tag\\\/structural-mechanics\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic\\\/do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time\\\/#listItem\",\"name\":\"Do one need to curve fit if the data is available for relative moduli and relaxation time?\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic\\\/do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time\\\/#listItem\",\"position\":4,\"name\":\"Do one need to curve fit if the data is available for relative moduli and relaxation time?\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic-tag\\\/structural-mechanics\\\/#listItem\",\"name\":\"structural-mechanics\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/#organization\",\"name\":\"Ansys Knowledge\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic\\\/do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic\\\/do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time\\\/\",\"name\":\"Do one need to curve fit if the data is available for relative moduli and relaxation time? | Ansys Knowledge\",\"description\":\"If one already have relative moduli and relaxation times that are verified to represent the material behavior, then you can just enter that directly without the need for curve fitting. For experimentally measured relaxation data (stress vs time), one has to use the curve fitter to calculate relative moduli and relaxation times.\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic\\\/do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time\\\/#breadcrumblist\"},\"datePublished\":\"2023-03-17T09:00:18+00:00\",\"dateModified\":\"2023-07-31T12:31:16+00:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/#website\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/\",\"name\":\"Ansys Knowledge\",\"description\":\"Ansys Innovation Space\",\"inLanguage\":\"en-US\",\"publisher\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"Do one need to curve fit if the data is available for relative moduli and relaxation time? | Ansys Knowledge","description":"If one already have relative moduli and relaxation times that are verified to represent the material behavior, then you can just enter that directly without the need for curve fitting. For experimentally measured relaxation data (stress vs time), one has to use the curve fitter to calculate relative moduli and relaxation times.","canonical_url":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time\/#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge#listItem","position":1,"name":"Home","item":"https:\/\/innovationspace.ansys.com\/knowledge","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/topics\/#listItem","name":"Topics"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/topics\/#listItem","position":2,"name":"Topics","item":"https:\/\/innovationspace.ansys.com\/knowledge\/topics\/","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic-tag\/structural-mechanics\/#listItem","name":"structural-mechanics"},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge#listItem","name":"Home"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic-tag\/structural-mechanics\/#listItem","position":3,"name":"structural-mechanics","item":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic-tag\/structural-mechanics\/","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time\/#listItem","name":"Do one need to curve fit if the data is available for relative moduli and relaxation time?"},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/topics\/#listItem","name":"Topics"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time\/#listItem","position":4,"name":"Do one need to curve fit if the data is available for relative moduli and relaxation time?","previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic-tag\/structural-mechanics\/#listItem","name":"structural-mechanics"}}]},{"@type":"Organization","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/#organization","name":"Ansys Knowledge","description":"Ansys Innovation Space","url":"https:\/\/innovationspace.ansys.com\/knowledge\/"},{"@type":"WebPage","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time\/#webpage","url":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time\/","name":"Do one need to curve fit if the data is available for relative moduli and relaxation time? | Ansys Knowledge","description":"If one already have relative moduli and relaxation times that are verified to represent the material behavior, then you can just enter that directly without the need for curve fitting. For experimentally measured relaxation data (stress vs time), one has to use the curve fitter to calculate relative moduli and relaxation times.","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/knowledge\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time\/#breadcrumblist"},"datePublished":"2023-03-17T09:00:18+00:00","dateModified":"2023-07-31T12:31:16+00:00"},{"@type":"WebSite","@id":"https:\/\/innovationspace.ansys.com\/knowledge\/#website","url":"https:\/\/innovationspace.ansys.com\/knowledge\/","name":"Ansys Knowledge","description":"Ansys Innovation Space","inLanguage":"en-US","publisher":{"@id":"https:\/\/innovationspace.ansys.com\/knowledge\/#organization"}}]},"og:locale":"en_US","og:site_name":"Ansys Knowledge | Ansys Innovation Space","og:type":"article","og:title":"Do one need to curve fit if the data is available for relative moduli and relaxation time? | Ansys Knowledge","og:description":"If one already have relative moduli and relaxation times that are verified to represent the material behavior, then you can just enter that directly without the need for curve fitting. For experimentally measured relaxation data (stress vs time), one has to use the curve fitter to calculate relative moduli and relaxation times.","og:url":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time\/","article:published_time":"2023-03-17T09:00:18+00:00","article:modified_time":"2023-07-31T12:31:16+00:00","twitter:card":"summary_large_image","twitter:title":"Do one need to curve fit if the data is available for relative moduli and relaxation time? | Ansys Knowledge","twitter:description":"If one already have relative moduli and relaxation times that are verified to represent the material behavior, then you can just enter that directly without the need for curve fitting. For experimentally measured relaxation data (stress vs time), one has to use the curve fitter to calculate relative moduli and relaxation times."},"aioseo_meta_data":{"post_id":"165442","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":"default","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":false,"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":"2025-10-17 22:11:51","updated":"2026-07-29 16:57:16","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\/knowledge\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/knowledge\/topics\/\" title=\"Topics\">Topics<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic-tag\/structural-mechanics\/\" title=\"structural-mechanics\">structural-mechanics<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tDo one need to curve fit if the data is available for relative moduli and relaxation time?\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/innovationspace.ansys.com\/knowledge"},{"label":"Topics","link":"https:\/\/innovationspace.ansys.com\/knowledge\/topics\/"},{"label":"structural-mechanics","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic-tag\/structural-mechanics\/"},{"label":"Do one need to curve fit if the data is available for relative moduli and relaxation time?","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/do-one-need-to-curve-fit-if-the-data-is-available-for-relative-moduli-and-relaxation-time\/"}],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_last_active_time":["3\/15\/2023 20:20"],"_bbp_forum_id":["27814"],"_bbp_author_ip":["23.56.168.180"],"_btv_view_count":["398"],"siebel_km_number":["2054234"],"product_version":["19"],"km_published_date":["2018-04-19T00:00:00.000Z"],"family":["Structural Mechanics"],"application_name":["Mechanical"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/165442","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/165442\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=165442"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}