AWG CI Test Case 4: Clamping Preload on Structural Joint
| Image: | |
| Animation: | Test Case 4 Beam Bolt Animation |
| Test Case 4 Solid Bolt Animation | |
| Description: | In this model, shell elements, which are typically used to model a cross-tube, and solid elements, which are typically used to model seat legs and spreaders, are clamped together using bolts with preload. A comparison of bolts modeled with 3D-solid elements (Subcase 1) and a single beam (1-D) element (Subcase 2) is investigated. The model is defined with the shell offset turned on so that the parts contact on the shell's physical surface, which develops the proper preload on the structure. |
| Status: | Accepted and currently part of the AWG CI Test Suite |
| Classification: | Application benchmark |
| Input Deck: | Test Case 4 Input |
| Keywords: | *ELEMENT_SOLID |
| *ELEMENT_BEAM | |
| *CONSTRAINED_NODAL_RIGID_BODY | |
| *MAT_ELASTIC | |
| *MAT_PIECEWISE_LINEAR_PLASTICITY | |
| *BOUNDARY_SPC_NODE | |
| *BOUNDARY_PRESCRIBED_MOTION | |
| Units: | in (length), s (time), lbf-s2/in (mass), lbf (force) |
| Model Data: | 3-D Solid Element Fastener: 5817 nodes, 418 shells, 3800 solids, 3 parts |
| 1-D Beam Element Fastener: 5573 nodes. 418 shells, 3640 solids, 3 parts | |
| Run Time: | Approx. total CPU time = 300s (Intel® Xeon® CPU E5-2680 @ 2.40GHz / MPP / 4 cpu) |
| Earliest Version : | LS-DYNA® R14.0 |
| Test Case Details and Results | |
| Test Case 4, Documentation and Results for LS-DYNA R16.0-563-g2adec5a05 | |
| Test Case 4, Documentation and Results for LS-DYNA R14.1.1-8-g2ef819c24f | |
| Test Case 4, Documentation and Results for LS-DYNA R13.2-28-gcc52f96e9d | |
| Test Case 4, Documentation and Results for LS-DYNA R14.1.1-4-gaf1eb871e8 | |
| Test Case 4, Documentation and Results for LS-DYNA R12.2-239-gd2e8ba324b | |
| Test Case 4, Documentation and Results for LS-DYNA R14.1-7-gea5f83301c | |
| Test Case 4, Documentation and Results for LS-DYNA R12.2 Revision 0-g0294a6e436 | |
| Test Case 4, Documentation and Results for LS-DYNA R14.0 Revision 461-gee93a457ac | |
| Bug Issues Found and Fixed: | BUG 944399 (BUG 18710): Calculation of bolt load modeled with a beam element. The load is calculated by performing a dynamic relaxation analysis after applying a preload to activate the contacts and place the model in a quasi-static states. The wrong results were obtained for all types but SMP DP. Remains Open. |
last modified on Wednesday October 29, 2025 07:28:23 PDT