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Welcome to Discourse
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0
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3621
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July 28, 2020
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Is Math plugin enabled for this site?
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1
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34
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November 1, 2026
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Supported ARPACK-NG or unsupported old ARPACK? What is better?
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11
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219
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October 30, 2026
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*CREEP, LAW=NORTON and *CREEP, LAW=USER giving slightly different results
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6
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64
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October 30, 2026
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CalculiX and LIS solver
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17
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357
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October 27, 2026
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Porting project of PrePoMax on Linux is available now
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4
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131
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October 26, 2026
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*DEFORMATION PLASTICITY in a *FREQUENCY step: ccx stops after the eigenvalues with "negative eigenvalue of the Cauchy-Green tensor", depending on the units
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3
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94
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October 24, 2026
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Ccxview: results viewer for CalculiX
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34
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757
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October 24, 2026
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CalculiX ccx, cgx and zstd compression
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5
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254
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October 24, 2026
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Abq2ccx input converter (Abaqus to CalculiX)
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21
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601
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October 23, 2026
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Engineering suite CAD, Calculix, OpenRadioss (OpenCourant)
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5
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153
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October 23, 2026
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Segmentation fault with ccx_2.19 dynamic modal analysis
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15
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1293
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October 23, 2026
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How to use surface set in radiate boundary condition
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7
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435
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October 23, 2026
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*ELEMENT with an unlisted TYPE starting with "D" (e.g. DASHPOT2) is read as a 3-node network element: two DASHPOT2 elements run with exit 0 and no damping
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2
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67
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October 23, 2026
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PERTURBATION *BUCKLE after a heated step: the base thermal strain enters the buckling load case; the factor is wrong and depends on the load size (exit 0)
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3
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49
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October 23, 2026
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*HEAT TRANSFER, *(UN)COUPLED TEMPERATURE-DISPLACEMENT, *VISCO: a blank or zero period (default 1.) prints "step size is negative" and runs with NaN time
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2
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61
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October 23, 2026
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Node surface on a *RIGID BODY node of plane elements, even an unused one: ccx adds a z-SPC and stops with "dependent side of a MPC and a SPC"
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2
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34
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October 23, 2026
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*MEMBRANE SECTION, COMPOSITE stops on every element, M3D8R and M3D6 included: "Element 1 is not a M3D8R nor a M3D6 membrane element"
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2
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34
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October 23, 2026
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*CLOAD / *DLOAD with TIME DELAY: two cards with the same AMPLITUDE and delay on one node DOF or face stop ccx with "different amplitudes in one step"
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2
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38
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October 23, 2026
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*KINEMATIC coupling of one DOF without ORIENTATION: the unused reference rotation stops SPOOLES with exit 255 and no message; an identity ORIENTATION solves
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2
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44
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October 23, 2026
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*DYNAMIC: a moment (*CLOAD on DOF 4-6) on a beam node stops ccx with exit 255 and no message (NaN in explicit), because the new knot's rotation starts at 0/0
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2
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46
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October 23, 2026
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*TIE with the same surface as slave and master: ccx loops forever printing "zero coefficient on the dependent side of an equation" (up to 2.21 an *ERROR)
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2
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49
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October 23, 2026
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*DYNAMIC step after a *STATIC step: random segfault or bus error in tempload when the step creates a knot and the deck has an *AMPLITUDE
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2
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33
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October 23, 2026
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*NO ANALYSIS step after a solved step: *EL FILE S, E or ENER segfaults, and *NODE FILE U or RF writes freed memory to the .frd with exit 0
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2
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34
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October 23, 2026
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Plastic, creep or user material: segfault in *NO ANALYSIS, *BUCKLE, *COMPLEX FREQUENCY, a linear *STATIC after *FREQUENCY, and modal steps with S/RF output
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2
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41
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October 23, 2026
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*TEMPERATURE with a step-time AMPLITUDE: at most one node is held at its end-of-step value; the others follow the amplitude again in the next step (exit 0)
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2
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33
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October 23, 2026
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PERTURBATION *BUCKLE / *FREQUENCY after a *BUCKLE step, or *FREQUENCY after a *MODAL DYNAMIC step, takes that step's displacements as reference state (exit 0)
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2
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41
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October 23, 2026
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DASHPOTA in implicit *DYNAMIC ignores the velocity of an end moved by *BOUNDARY (also through an *EQUATION): the free end stays at rest (exit 0)
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2
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43
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October 22, 2026
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C3D8R hourglass force uses the current tangent C1111: an unreached *PLASTIC card makes it 35 % stiffer, and elastoplastic C3D8R models can stop (too many cutbacks)
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2
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35
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October 22, 2026
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Two *KINEMATIC couplings on one REF NODE: the surfaces turn independently, and a moment on the reference node reaches only one, chosen by card order (exit 0)
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2
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45
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October 22, 2026
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