{"id":3632,"date":"2023-05-25T12:43:43","date_gmt":"2023-05-25T12:43:43","guid":{"rendered":"https:\/\/plm.systemworkx.de\/docs\/calculation-of-field-outputs-from-frames-in-abaqus-cae-and-abaqus-viewer\/"},"modified":"2023-07-17T16:58:41","modified_gmt":"2023-07-17T16:58:41","password":"","slug":"calculation-of-field-outputs-from-frames-in-abaqus-cae-and-abaqus-viewer","status":"publish","type":"docs","link":"https:\/\/plm.systemworkx.de\/en\/docs\/calculation-of-field-outputs-from-frames-in-abaqus-cae-and-abaqus-viewer\/","title":{"rendered":"Calculation of field outputs from frames in Abaqus\/CAE and Abaqus\/Viewer"},"content":{"rendered":"

<\/div><\/div><\/span>

Introduction<\/h2><\/h2><\/span>
<\/div><\/div><\/div>

In Abaqus\/CAE Module Visualization or in Abaqus\/Viewer, FIELD outputs, such as stresses and strains, are output in frames. Here, frames stand for time points or individual frequencies, for example. Now, there is a possibility to use the values of different frames to calculate new outputs.<\/p>\n

An example to better estimate the fatigue strength of a component will explain the procedure. However, it is not a general procedure for fatigue strength verification.<\/p>\n<\/div>

<\/div><\/div><\/span>

Example<\/h2><\/h2><\/span>
<\/div><\/div><\/div>

Three independent load cases (PERTURBATION Steps) are considered:<\/p>\n

Step 1 : Tension load -> 100 MPa tensile stress
\nStep 2: As 1 plus bending load in positive Y-direction, load case “Up”
\nStep 3: As 1 plus bending load in negative Y-direction, load case “Down”<\/p>\n<\/div>

<\/a><\/span><\/div><\/div>
<\/div><\/div><\/div><\/div><\/div>
<\/a><\/span><\/div><\/div>

Step 1: Tensile stress 100 MPa<\/p>\n<\/div><\/div><\/div>

<\/a><\/span><\/div><\/div>

Step 2: Tensile and bending stress superimposed<\/p>\n

Step 3: Like Step 2 , but reversal of the bending load<\/p>\n<\/div><\/div><\/div><\/div><\/div>

In this simple example, you can manually determine some values to evaluate the fatigue strength.<\/p>\n

This results in an additional bending stress of 150 MPa. The maximum upper stress Smax is 250 MPa. The minimum stress Smin is -50 MPa. Thus, the mean stress is: (Smax+Smin)\/2= 100 MPa and the amplitude is ABS(Smax-Smin)\/2= 150 MPa.<\/p>\n

We will now show how to determine these values in Abaqus\/CAE via the calculation with frames.<\/p>\n<\/div>

<\/div><\/div><\/div><\/div><\/div>
<\/div><\/div><\/span>

Generation of additional output<\/h2><\/h2><\/span>
<\/div><\/div><\/div>

Now, we generate the calculation and field putput of the mean stress and amplitude from different frames.<\/p>\n<\/div><\/div><\/div>

Step 1: Generate output values via frames of the steps<\/p>\n<\/div><\/div><\/div>

<\/a><\/span><\/div><\/div><\/div><\/div><\/div><\/div>
<\/div><\/div><\/div><\/div><\/div>

Step 2: Selection of the frames for the evaluation, here the last increment of the load cases “Up” and “Down”, operation: maximum over all frames.<\/p>\n

Any number of load cases can be selected from any number of steps.<\/p>\n<\/div><\/div><\/div>

<\/a><\/span><\/div><\/div><\/div><\/div><\/div><\/div>
<\/div><\/div><\/div><\/div><\/div>

Step 3: Select the output value, here S11, then select “Apply” to save without leaving the dialog.<\/p>\n

All stress components are available.<\/p>\n<\/div><\/div><\/div>

<\/a><\/span><\/div><\/div><\/div><\/div><\/div><\/div>
<\/div><\/div><\/div><\/div><\/div>

Step 4: Now, change the operation to minimum value for S11 and exit the dialog with “OK”.<\/p>\n<\/div><\/div><\/div>

<\/a><\/span><\/div><\/div><\/div><\/div><\/div><\/div>
<\/div><\/div><\/div><\/div><\/div>

Step 5: Now, the generated frames can be used to determine amplitude and mean stress.<\/p>\n

The previously generated output values now appear in the automatically generated “Session Step” as frames 1 and 2.<\/p>\n<\/div><\/div><\/div>

<\/a><\/span><\/div><\/div><\/div><\/div><\/div><\/div>
<\/div><\/div><\/div><\/div><\/div>
<\/a><\/span><\/div><\/div>

Step 6: Determining the mean stress<\/p>\n<\/div>

<\/div><\/div><\/div><\/div><\/div>
<\/a><\/span><\/div><\/div>

Step 7: Determining the amplitude<\/p>\n<\/div>

<\/div><\/div><\/div><\/div><\/div>
<\/a><\/span><\/div><\/div>

Mean stress and amplitude are now stored in frame 0<\/p>\n<\/div>

<\/div><\/div><\/div><\/div><\/div>
<\/a><\/span><\/div><\/div>

Mean stress and amplitude<\/p>\n<\/div>

<\/div><\/div><\/div><\/div><\/div>
<\/div><\/div><\/span>

Determination of the utilization<\/h2><\/h2><\/span>
<\/div><\/div><\/div>

Determination of the load via fatigue strength diagram (here: Smith diagram)<\/p>\n

Red: material fatigue strength<\/p>\n

Green: Reduced fatigue strength (material fatigue strength reduced by technological size factor and roughness factor).<\/p>\n<\/div>

<\/div><\/div><\/div><\/div><\/div>
<\/a><\/span><\/div><\/div><\/div><\/div>

Maximum stress 250 MPa at 100 MPa mean stress<\/p>\n

Minimum stress -50 MPa at 100 MPa mean stress<\/p>\n<\/div><\/div><\/div><\/div><\/div>

<\/div>
<\/div><\/div><\/span>

Summary<\/h2><\/h2><\/span>
<\/div><\/div><\/div>

The method shown here refers to uniaxial loading and does not claim to be a general procedure for fatigue strength verification.<\/p>\n

Rather, it is intended to clarify the generation of output values via frames and fields and to demonstrate a pragmatic method for rapid estimation of component fatigue strength.<\/p>\n<\/div>

<\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"doc_category":[84],"doc_tag":[87],"class_list":["post-3632","docs","type-docs","status-publish","hentry","doc_category-simulation-en","doc_tag-simulia-en"],"aioseo_notices":[],"year_month":"2026-04","word_count":26600,"total_views":"1715","reactions":{"happy":"0","normal":"0","sad":"0"},"author_info":{"name":"Ulrich","author_nicename":"ulrich","author_url":"https:\/\/plm.systemworkx.de\/en\/author\/ulrich\/"},"doc_category_info":[{"term_name":"Simulation","term_url":"https:\/\/plm.systemworkx.de\/en\/docs-category\/simulation-en\/"}],"doc_tag_info":[{"term_name":"simulia","term_url":"https:\/\/plm.systemworkx.de\/en\/docs-tag\/simulia-en\/"}],"knowledge_base_info":[],"knowledge_base_slug":[],"_links":{"self":[{"href":"https:\/\/plm.systemworkx.de\/en\/wp-json\/wp\/v2\/docs\/3632","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/plm.systemworkx.de\/en\/wp-json\/wp\/v2\/docs"}],"about":[{"href":"https:\/\/plm.systemworkx.de\/en\/wp-json\/wp\/v2\/types\/docs"}],"author":[{"embeddable":true,"href":"https:\/\/plm.systemworkx.de\/en\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/plm.systemworkx.de\/en\/wp-json\/wp\/v2\/comments?post=3632"}],"version-history":[{"count":3,"href":"https:\/\/plm.systemworkx.de\/en\/wp-json\/wp\/v2\/docs\/3632\/revisions"}],"predecessor-version":[{"id":3635,"href":"https:\/\/plm.systemworkx.de\/en\/wp-json\/wp\/v2\/docs\/3632\/revisions\/3635"}],"wp:attachment":[{"href":"https:\/\/plm.systemworkx.de\/en\/wp-json\/wp\/v2\/media?parent=3632"}],"wp:term":[{"taxonomy":"doc_category","embeddable":true,"href":"https:\/\/plm.systemworkx.de\/en\/wp-json\/wp\/v2\/doc_category?post=3632"},{"taxonomy":"doc_tag","embeddable":true,"href":"https:\/\/plm.systemworkx.de\/en\/wp-json\/wp\/v2\/doc_tag?post=3632"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}