{"id":453924,"date":"2026-03-07T08:05:58","date_gmt":"2026-03-07T08:05:58","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/rc-blast-door-sale-simulation-deflection-trend-matches-literature-but-peak-disp\/"},"modified":"2026-03-07T08:05:58","modified_gmt":"2026-03-07T08:05:58","slug":"rc-blast-door-sale-simulation-deflection-trend-matches-literature-but-peak-disp","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/rc-blast-door-sale-simulation-deflection-trend-matches-literature-but-peak-disp\/","title":{"rendered":"RC blast door SALE simulation: deflection trend matches literature but peak disp"},"content":{"rendered":"

<p data-start=”216″ data-end=”319″>When simulating an RC blast door using <strong data-start=”255″ data-end=”273″>SALE (ALE–FSI)<\/strong> in <span class=”whitespace-normal”>LS-DYNA<\/span>,<\/p><p data-start=”321″ data-end=”450″>the <strong data-start=”325″ data-end=”393″>time-history trend of the door deflection matches the literature<\/strong>, but the <strong data-start=”403″ data-end=”449″>peak displacement is significantly smaller<\/strong>.\"Dark<\/p><div class=”TyagGW_tableContainer”><div class=”group TyagGW_tableWrapper flex flex-col-reverse w-fit” tabindex=”-1″><table class=”w-fit min-w-(–thread-content-width)” data-start=”452″ data-end=”532″><thead data-start=”452″ data-end=”473″><tr data-start=”452″ data-end=”473″><th class=”” data-start=”452″ data-end=”454″ data-col-size=”sm”> <\/th><th class=”” data-start=”454″ data-end=”473″ data-col-size=”sm”>Peak deflection<\/th><\/tr><\/thead><tbody data-start=”484″ data-end=”532″><tr data-start=”484″ data-end=”508″><td data-start=”484″ data-end=”497″ data-col-size=”sm”>Literature<\/td><td data-start=”497″ data-end=”508″ data-col-size=”sm”>3.47 mm<\/td><\/tr><tr data-start=”509″ data-end=”532″><td data-start=”509″ data-end=”520″ data-col-size=”sm”>My model<\/td><td data-start=”520″ data-end=”532″ data-col-size=”sm”>< 2.0 mm<\/td><\/tr><\/tbody><\/table><\/div><\/div><p data-start=”534″ data-end=”608″>So the <strong data-start=”541″ data-end=”607″>response shape is correct, but the amplitude is underestimated<\/strong>.<\/p><hr data-start=”610″ data-end=”613″><h1 data-section-id=”l0dx7p” data-start=”615″ data-end=”630″>Model summary<\/h1><h2 data-section-id=”1fj62nz” data-start=”632″ data-end=”643″>Geometry<\/h2><ul data-start=”644″ data-end=”794″><li data-section-id=”19hxg5u” data-start=”644″ data-end=”675″><p data-start=”646″ data-end=”675″>RC door thickness: <strong data-start=”665″ data-end=”675″>100 mm<\/strong><\/p><\/li>\n

<li data-section-id=”1g5rvbz” data-start=”676″ data-end=”708″><p data-start=”678″ data-end=”708″>Door location: <strong data-start=”693″ data-end=”708″>z = 0–0.1 m<\/strong><\/p><\/li>\n

<li data-section-id=”d715vz” data-start=”709″ data-end=”741″><p data-start=”711″ data-end=”741″>ALE domain: <strong data-start=”723″ data-end=”741″>z = -0.6–3.4 m<\/strong><\/p><\/li>\n

<li data-section-id=”28srp” data-start=”742″ data-end=”794″><p data-start=”744″ data-end=”794″>Door <strong data-start=”749″ data-end=”794″>rear surface initially touching the frame\"\"<\/strong><\/p><\/li>\n<\/ul>\n

<hr data-start=”796″ data-end=”799″><h2 data-section-id=”13lbijm” data-start=”801″ data-end=”813″>Explosive<\/h2><ul data-start=”814″ data-end=”878″><li data-section-id=”olji2y” data-start=”814″ data-end=”832″><p data-start=”816″ data-end=”832″>TNT: <strong data-start=”821″ data-end=”832″>0.15 kg<\/strong><\/p><\/li>\n

<li data-section-id=”1s39v9c” data-start=”833″ data-end=”878″><p data-start=”835″ data-end=”878″>Half model with <strong data-start=”851″ data-end=”878″>symmetry plane at x = 0<\/strong><\/p><\/li>\n<\/ul>\n

<hr data-start=”880″ data-end=”883″><h2 data-section-id=”1g556vy” data-start=”885″ data-end=”896″>ALE mesh<\/h2><div class=”relative w-full mt-4 mb-1″><div class=””><div class=”relative”><div class=”h-full min-h-0 min-w-0″><div class=”h-full min-h-0 min-w-0″><div class=”border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl”><div class=”h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback”><div class=””><div class=”relative z-0 flex max-w-full”><div id=”code-block-viewer” class=”q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037ck \u037cy” dir=”ltr”><div class=”cm-scroller”><div class=”cm-content q9tKkq_readonly”>10 mm<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=””><div class=””> <\/div><\/div><\/div><\/div><\/div><hr data-start=”916″ data-end=”919″><h2 data-section-id=”1bvqh7m” data-start=”921″ data-end=”932″>Concrete<\/h2><div class=”relative w-full mt-4 mb-1″><div class=””><div class=”relative”><div class=”h-full min-h-0 min-w-0″><div class=”h-full min-h-0 min-w-0″><div class=”border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl”><div class=”h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback”><div class=””><div class=”relative z-0 flex max-w-full”><div id=”code-block-viewer” class=”q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037ck \u037cy” dir=”ltr”><div class=”cm-scroller”><div class=”cm-content q9tKkq_readonly”>MAT_072R3 (KCC)<br>f’c ≈ 19.7 MPa<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=””><div class=””> <\/div><\/div><\/div><\/div><\/div><hr data-start=”977″ data-end=”980″><h2 data-section-id=”ayu17e” data-start=”982″ data-end=”998″>Reinforcement<\/h2><div class=”relative w-full mt-4 mb-1″><div class=””><div class=”relative”><div class=”h-full min-h-0 min-w-0″><div class=”h-full min-h-0 min-w-0″><div class=”border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl”><div class=”h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback”><div class=”pointer-events-none absolute inset-x-4 top-12 bottom-4″><div class=”pointer-events-none sticky z-40 shrink-0 z-1!”><div class=”sticky bg-token-border-light”> <\/div><\/div><\/div><div class=””><div class=”relative z-0 flex max-w-full”><div id=”code-block-viewer” class=”q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037ck \u037cy” dir=”ltr”><div class=”cm-scroller”><div class=”cm-content q9tKkq_readonly”>MAT_PLASTIC_KINEMATIC<br>E = 200 GPa<br>ETAN = 1e9 Pa<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><p data-start=”1060″ data-end=”1075″>Embedded using: CONSTRAINED_BEAM_IN_SOLID_PENALTY<\/p><hr data-start=”1124″ data-end=”1127″><h2 data-section-id=”qfdzp” data-start=”1129″ data-end=”1146″>Solid elements<\/h2><div class=”relative w-full mt-4 mb-1″><div class=””><div class=”relative”><div class=”h-full min-h-0 min-w-0″><div class=”h-full min-h-0 min-w-0″><div class=”border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl”><div class=”h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback”><div class=””><div class=”relative z-0 flex max-w-full”><div id=”code-block-viewer” class=”q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037ck \u037cy” dir=”ltr”><div class=”cm-scroller”><div class=”cm-content q9tKkq_readonly”>ELFORM = 1<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=””><div class=””> <\/div><\/div><\/div><\/div><\/div><hr data-start=”1171″ data-end=”1174″><h2 data-section-id=”142oigs” data-start=”1176″ data-end=”1191″>FSI coupling<\/h2><div class=”relative w-full mt-4 mb-1″><div class=””><div class=”relative”><div class=”h-full min-h-0 min-w-0″><div class=”h-full min-h-0 min-w-0″><div class=”border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl”><div class=”h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback”><div class=”pointer-events-none absolute inset-x-4 top-12 bottom-4″><div class=”pointer-events-none sticky z-40 shrink-0 z-1!”><div class=”sticky bg-token-border-light”> <\/div><\/div><\/div><div class=””><div class=”relative z-0 flex max-w-full”><div id=”code-block-viewer” class=”q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037ck \u037cy” dir=”ltr”><div class=”cm-scroller”><div class=”cm-content q9tKkq_readonly”>ALE_STRUCTURED_FSI<br>LSTRSID = 1<br>(part set includes parts 1,2,3,4,5,11)<br>PFAC = 1<br>FLIP = 0<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=””><div class=””> <\/div><\/div><\/div><\/div><\/div><hr data-start=”1293″ data-end=”1296″><h2 data-section-id=”a2jb2d” data-start=”1298″ data-end=”1308″>Contact<\/h2><p data-start=”1309″ data-end=”1332″>Door–frame interaction:<\/p><div class=”relative w-full mt-4 mb-1″><div class=””><div class=”relative”><div class=”h-full min-h-0 min-w-0″><div class=”h-full min-h-0 min-w-0″><div class=”border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl”><div class=”h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback”><div class=”pointer-events-none absolute inset-x-4 top-12 bottom-4″><div class=”pointer-events-none sticky z-40 shrink-0 z-1!”><div class=”sticky bg-token-border-light”> <\/div><\/div><\/div><div class=””><div class=”relative z-0 flex max-w-full”><div id=”code-block-viewer” class=”q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037ck \u037cy” dir=”ltr”><div class=”cm-scroller”><div class=”cm-content q9tKkq_readonly”>CONTACT_AUTOMATIC_SURFACE_TO_SURFACE<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=””><div class=””> <\/div><\/div><\/div><\/div><\/div><p data-start=”1384″ data-end=”1466″>Frame is <strong data-start=”1393″ data-end=”1465″>located behind the door and initially touching the door rear surface<\/strong>.<\/p><p data-start=”1468″ data-end=”1477″>Friction:<\/p><div class=”relative w-full mt-4 mb-1″><div class=””><div class=”relative”><div class=”h-full min-h-0 min-w-0″><div class=”h-full min-h-0 min-w-0″><div class=”border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl”><div class=”h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback”><div class=””><div class=”relative z-0 flex max-w-full”><div id=”code-block-viewer” class=”q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037ck \u037cy” dir=”ltr”><div class=”cm-scroller”><div class=”cm-content q9tKkq_readonly”>FS = 0.2<br>FD = 0.15<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=””><div class=””> <\/div><\/div><\/div><\/div><\/div><hr data-start=”1512″ data-end=”1515″><h1 data-section-id=”f1jprp” data-start=”1517″ data-end=”1542″>Tests already performed<\/h1><h3 data-section-id=”1s8do4e” data-start=”1544″ data-end=”1567″>ALE backside domain<\/h3><div class=”relative w-full mt-4 mb-1″><div class=””><div class=”relative”><div class=”h-full min-h-0 min-w-0″><div class=”h-full min-h-0 min-w-0″><div class=”border border-token-border-light border-radius-3xl corner-superellipse\/1.1 rounded-3xl”><div class=”h-full w-full border-radius-3xl bg-token-bg-elevated-secondary corner-superellipse\/1.1 overflow-clip rounded-3xl lxnfua_clipPathFallback”><div class=”pointer-events-none absolute inset-x-4 top-12 bottom-4″><div class=”pointer-events-none sticky z-40 shrink-0 z-1!”><div class=”sticky bg-token-border-light”> <\/div><\/div><\/div><div class=””><div class=”relative z-0 flex max-w-full”><div id=”code-block-viewer” class=”q9tKkq_viewer cm-editor z-10 light:cm-light dark:cm-light flex h-full w-full flex-col items-stretch \u037ck \u037cy” dir=”ltr”><div class=”cm-scroller”><div class=”cm-content q9tKkq_readonly”>z = -0.6 → -0.3<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=””><div class=””> <\/div><\/div><\/div><\/div><\/div><p data-start=”1596″ data-end=”1617″>No noticeable effect.<\/p><hr data-start=”1619″ data-end=”1622″><h3 data-section-id=”1ixko64″ data-start=”1624″ data-end=”1658″>Beam–solid coupling parameters<\/h3><p data-start=”1659″ data-end=”1713″>Adjusted penalty parameters → <strong data-start=”1689″ data-end=”1713″>no noticeable effect<\/strong><\/p><hr data-start=”1715″ data-end=”1718″><h3 data-section-id=”19ok7fa” data-start=”1720″ data-end=”1745″>Frame-wall connection<\/h3><p data-start=”1746″ data-end=”1801″>Removing shared nodes → <strong data-start=”1770″ data-end=”1801″>response trend became worse<\/strong><\/p><hr data-start=”1803″ data-end=”1806″><h1 data-section-id=”hh93l4″ data-start=”1808″ data-end=”1818″>Question<\/h1><p data-start=”1820″ data-end=”1859″>In <strong data-start=”1823″ data-end=”1852″>ALE–FSI blast simulations<\/strong>, when:<\/p><ul data-start=”1861″ data-end=”1993″><li data-section-id=”laum6d” data-start=”1861″ data-end=”1898″><p data-start=”1863″ data-end=”1898″>pressure history appears reasonable<\/p><\/li>\n

<li data-section-id=”147b0ew” data-start=”1899″ data-end=”1951″><p data-start=”1901″ data-end=”1951″>displacement time-history trend matches literature<\/p><\/li>\n

<li data-section-id=”12d7n9f” data-start=”1952″ data-end=”1993″><p data-start=”1954″ data-end=”1993″>but peak displacement is underestimated<\/p><\/li>\n<\/ul>\n

<p data-start=”1995″ data-end=”2031″>what are the <strong data-start=”2008″ data-end=”2030″>most common causes<\/strong>?<\/p><p data-start=”2033″ data-end=”2068″>In particular, I would like to ask:<\/p><\/p>\n

<p data-start=”2072″ data-end=”2231″>Could the <strong data-start=”2082″ data-end=”2156″>door–frame initial contact (rear surface initially touching the frame)<\/strong> act as an early support condition and reduce the door bending deformation?<\/p><\/p><\/blockquote>\n

<p data-start=”2233″ data-end=”2301″>Any suggestions or similar experiences would be greatly appreciated.<\/p><\/p>\n","protected":false},"template":"","class_list":["post-453924","topic","type-topic","status-publish","hentry","topic-tag-explicitdynamicssolverautodyne-1","topic-tag-doormodel-1","topic-tag-Explosion-1","topic-tag-sale-2"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27814"],"_bbp_topic_id":["453924"],"_bbp_subscription":["660586","13640","58821"],"_bbp_author_ip":["203.204.120.114"],"_bbp_last_reply_id":["453962"],"_bbp_last_active_id":["453962"],"_bbp_last_active_time":["2026-03-09 07:08:55"],"_bbp_reply_count":["2"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["3"],"_bbp_engagement":["660586","13640","58821"],"_btv_view_count":["97"],"_bbp_topic_status":["unanswered"]},"test":"n66134267gs-ncku-edu-tw"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/453924","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\/453924\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=453924"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}