{"id":1515,"date":"2022-06-24T20:55:17","date_gmt":"2022-06-25T03:55:17","guid":{"rendered":"https:\/\/gantovnik.com\/bio-tips\/?p=1515"},"modified":"2022-06-24T20:58:18","modified_gmt":"2022-06-25T03:58:18","slug":"210-parametric-curve-in-3d-2-2-2-2-2-2-2-2-2-2-2-2-2-3-2-2-2-2-2-2-2-2-2-3-2-2-2-2-2-2-2-2-2-2-2","status":"publish","type":"post","link":"https:\/\/gantovnik.com\/bio-tips\/2022\/06\/210-parametric-curve-in-3d-2-2-2-2-2-2-2-2-2-2-2-2-2-3-2-2-2-2-2-2-2-2-2-3-2-2-2-2-2-2-2-2-2-2-2\/","title":{"rendered":"#287 Thin shell buckling under axial compression"},"content":{"rendered":"

\"\"<\/p>\n

Reference: Horton W.H. and Durham S.C. “The effect of restricting buckle depth in circular cylindrical shells repeatedly compressed to the buckling limit”, SUDAER No. 174, Stanford University, 1963. The cylindrical shell has a mandrel inside that prevents the buckles from growing without limit.<\/p>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Reference: Horton W.H. and Durham S.C. “The effect of restricting buckle depth in circular cylindrical shells repeatedly compressed to the buckling limit”, SUDAER No. 174, Stanford University, 1963. The cylindrical shell has a mandrel inside that prevents the buckles from growing without limit.    <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","_lmt_disableupdate":"yes","_lmt_disable":"","jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[34],"tags":[23],"class_list":["post-1515","post","type-post","status-publish","format-standard","hentry","category-buckling","tag-hypermesh"],"modified_by":"gantovnik","jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8bH0k-or","jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":539,"url":"https:\/\/gantovnik.com\/bio-tips\/2020\/05\/optistruct-can-i-use-buckling-constraints-on-a-topology-or-free-size-optimization\/","url_meta":{"origin":1515,"position":0},"title":"OptiStruct: Can I use buckling constraints on a topology or free-size optimization?","author":"gantovnik","date":"2020-05-09","format":false,"excerpt":"OptiStruct: Can I use buckling constraints on a topology or free-size optimization? There are several barriers for buckling constraints in topology optimization: Buckling constraints are conditional, similar to stress constraints (see Can I use stress constraints with topology or free-size optimization?). Structural instability does not exist when structural parts vanish.\u2026","rel":"","context":"In "HyperMesh"","block_context":{"text":"HyperMesh","link":"https:\/\/gantovnik.com\/bio-tips\/category\/hypermesh\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":648,"url":"https:\/\/gantovnik.com\/bio-tips\/2020\/09\/105-how-to-remove-offsets-defined-on-shell-and-beams\/","url_meta":{"origin":1515,"position":1},"title":"#105: How to remove offsets defined on shell and beams?","author":"gantovnik","date":"2020-09-25","format":false,"excerpt":"#105: How to remove offsets defined on shell and beams? Method 1: Properties > Modify > GLOBAL Method 2: Utility > Property > Property Editor Property Words to Change: 4111 Plate Offset, Only Process If Exists: Check, Action: =, Value: 0 Offsets should not be used for the beam and\u2026","rel":"","context":"In "nastran"","block_context":{"text":"nastran","link":"https:\/\/gantovnik.com\/bio-tips\/category\/nastran\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1558,"url":"https:\/\/gantovnik.com\/bio-tips\/2022\/09\/210-parametric-curve-in-3d-2-2-2-2-2-2-2-2-2-2-2-2-2-3-3-2-2-3-2\/","url_meta":{"origin":1515,"position":2},"title":"#301 Buckling Glossary","author":"gantovnik","date":"2022-09-13","format":false,"excerpt":"Asymmetric buckling: When the structure has asymmetric geometry it may undergo stable buckling for a positive displacement parameter and unstable buckling if this displacement parameter is negative. Bifurcation point: A point along a primary equilibrium path (or curve) intersected by a secondary path. Beyond this point, the primary equilibrium path\u2026","rel":"","context":"In "python"","block_context":{"text":"python","link":"https:\/\/gantovnik.com\/bio-tips\/category\/python\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1850,"url":"https:\/\/gantovnik.com\/bio-tips\/2023\/05\/346-yoshimira-buckling-pattern\/","url_meta":{"origin":1515,"position":3},"title":"#346 Yoshimira Buckling Pattern","author":"gantovnik","date":"2023-05-19","format":false,"excerpt":"Yoshimira Buckling Pattern","rel":"","context":"In "buckling"","block_context":{"text":"buckling","link":"https:\/\/gantovnik.com\/bio-tips\/category\/buckling\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/gantovnik.com\/bio-tips\/wp-content\/uploads\/2023\/05\/2023-05-19_173023.png?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":2146,"url":"https:\/\/gantovnik.com\/bio-tips\/2024\/04\/418-some-comments-about-exclude-command-in-linear-buckling-analysis-using-optistruct\/","url_meta":{"origin":1515,"position":4},"title":"#418 Some comments about EXCLUDE command in Linear Buckling Analysis using OptiStruct","author":"gantovnik","date":"2024-04-10","format":false,"excerpt":"The EXCLUDE command can be used to select a set of elements to be excluded from a Linear Buckling Analysis. EXCLUDE = ESID (ESID is Set identification number of an element set) The excluded elements are only removed from the geometric stiffness matrix, resulting in a Buckling Analysis with elastic\u2026","rel":"","context":"In "HyperMesh"","block_context":{"text":"HyperMesh","link":"https:\/\/gantovnik.com\/bio-tips\/category\/hypermesh\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":637,"url":"https:\/\/gantovnik.com\/bio-tips\/2020\/09\/100-negative-eigenvalue-in-buckling-analysis\/","url_meta":{"origin":1515,"position":5},"title":"#100: Negative eigenvalue in buckling analysis","author":"gantovnik","date":"2020-09-25","format":false,"excerpt":"#100: Negative eigenvalue in buckling analysis In buckling analysis, a negative eigenvalue implies that the load that causes the structure to buckle is opposite to the direction of the applied load. A negative eigenvalue means that the critical load has a reversed direction compared to the applied load. Applying a\u2026","rel":"","context":"In "nastran"","block_context":{"text":"nastran","link":"https:\/\/gantovnik.com\/bio-tips\/category\/nastran\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/posts\/1515","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/comments?post=1515"}],"version-history":[{"count":0,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/posts\/1515\/revisions"}],"wp:attachment":[{"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/media?parent=1515"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/categories?post=1515"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gantovnik.com\/bio-tips\/wp-json\/wp\/v2\/tags?post=1515"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}