forked from 1b-agent/fieldcraft-upstream
jyvikoandClaude Opus 5.5
ce8e23d05b
Neo-Hookean, Mooney–Rivlin and Yeoh materials in explicit dynamics, in total form from the deformation gradient (objective by construction): the one-point hex8 takes its mean F over the undeformed element and the stress τ/J; tet4 takes the isochoric stress of its own F with the average nodal pressure of the decoupled volumetric energy (Bonet–Burton at finite strain). Each element's frequency bound follows the tangent's largest normal stiffness. Small-displacement steps and thermal strain of hyperelastic elements are refused by name. Verified by uniaxial strain to λ = 1.5 of all three laws on hex8 and tet4 against the material point (to rounding), and the oracle case explicit-neo-hookean-implicit: a quasi-static explicit pull against the implicit nonlinear solver (lateral contraction to 0.09%, stress to 0.03%). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo
245 lines
3.0 KiB
JSON
245 lines
3.0 KiB
JSON
[
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{
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"command": "mesh.block",
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"params": {
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"body": "Cube",
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"kind": "tet4",
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"corners": [
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[
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0,
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0,
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0
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],
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[
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1,
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0,
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0
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],
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[
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1,
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1,
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0
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],
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[
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0,
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0
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],
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[
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0,
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1
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],
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[
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1,
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0,
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1
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],
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[
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1,
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1,
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1
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],
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[
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0,
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1,
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1
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]
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],
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"divisions": [
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2,
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2,
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2
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],
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"faces": {
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"6": "x0",
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"3": "y0",
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"1": "z0",
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"4": "x1"
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}
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}
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},
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{
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"command": "model.set.create",
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"params": {
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"name": "all",
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"geometry": [
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{
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"body": "Cube"
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}
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]
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}
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},
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{
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"command": "model.set.create",
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"params": {
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"name": "x0",
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"geometry": [
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{
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"body": "Cube",
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"face": "x0"
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}
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]
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}
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},
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{
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"command": "model.set.create",
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"params": {
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"name": "y0",
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"geometry": [
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{
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"body": "Cube",
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"face": "y0"
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}
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]
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}
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},
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{
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"command": "model.set.create",
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"params": {
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"name": "z0",
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"geometry": [
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{
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"body": "Cube",
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"face": "z0"
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}
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]
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}
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},
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{
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"command": "model.set.create",
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"params": {
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"name": "x1",
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"geometry": [
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{
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"body": "Cube",
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"face": "x1"
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}
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]
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}
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},
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{
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"command": "model.material.create",
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"params": {
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"name": "Rubber",
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"elastic": {
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"type": "isotropic",
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"young": 10.0,
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"poisson": 0.3
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},
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"density": 1.0,
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"hyperelastic": {
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"type": "neo_hookean"
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}
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}
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},
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{
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"command": "model.section.create",
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"params": {
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"name": "cube",
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"set": "all",
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"material": "Rubber",
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"kind": {
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"type": "solid"
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}
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}
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},
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{
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"command": "model.boundary_condition.create",
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"params": {
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"name": "sx",
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"type": "symmetry",
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"target": {
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"set": "x0"
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},
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"plane": "x"
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}
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},
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{
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"command": "model.boundary_condition.create",
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"params": {
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"name": "sy",
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"type": "symmetry",
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"target": {
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"set": "y0"
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},
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"plane": "y"
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}
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},
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{
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"command": "model.boundary_condition.create",
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"params": {
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"name": "sz",
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"type": "symmetry",
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"target": {
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"set": "z0"
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},
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"plane": "z"
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}
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},
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{
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"command": "model.boundary_condition.create",
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"params": {
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"name": "pull",
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"type": "displacement",
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"target": {
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"set": "x1"
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},
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"values": [
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0.5,
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null,
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null,
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null,
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null,
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null
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]
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}
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},
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{
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"command": "model.step.create",
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"params": {
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"name": "Static",
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"procedure": {
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"type": "nonlinear_static"
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},
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"boundary_conditions": [
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"sx",
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"sy",
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"sz",
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"pull"
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],
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"loads": []
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}
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},
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{
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"command": "model.step.create",
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"params": {
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"name": "Dynamic",
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"procedure": {
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"type": "explicit_dynamic",
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"end_time": 100.0
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},
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"boundary_conditions": [
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"sx",
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"sy",
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"sz",
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"pull"
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],
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"loads": []
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}
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},
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{
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"command": "solve.nonlinear",
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"params": {
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"step": "Static"
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},
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"id": "implicit"
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},
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{
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"command": "solve.explicit",
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"params": {
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"step": "Dynamic"
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},
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"id": "explicit"
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}
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] |