At this point, DYNA3D became the first code to have a general single surface contact algorithm. The added features included beams, shells, rigid bodies, single surface contact, interface friction, discrete springs and dampers, optional hourglass treatments, optional exact volume integration, and VAX/VMS, IBM, UNIX, COS operating system compatibility.
Hallquist was the sole developer of DYNA3D until 1984, when he was joined by Dr. Improvements in 1982 further boosted the execution speed by about 10 percent. The release also permitted the analysis of structural response due to penetrating projectiles. The 1982 release included nine additional material models which allowed for new simulations, such as explosive-structure and soil-structure interactions. This version also eliminated structural and higher order solid elements of the first version, while including element-wise integration of the integral difference method developed in 1974. This new release contained improved sliding interface treatment which was an order of magnitude faster than the previous contact treatment. In 1979 a new version of DYNA3D was released which was programmed for optimal performance on the CRAY-1 supercomputers. In 1978 the DYNA3D source code was released into the public domain without restrictions after a request from France. A two-dimensional version of the same software was developed concurrently. The program was initially very simple largely due to the lack of adequate computational resources at the time. DYNA3D used explicit time integration to study nonlinear dynamic problems, with the original applications being mostly stress analysis of structures undergoing various types of impacts. Though the FUFO bomb was eventually canceled, development of DYNA3D continued. At the time, no 3D software was available for simulating impact, and 2D software was inadequate.
DYNA3D was created in order to simulate the impact of the Full Fusing Option (FUFO) or 'Dial-a-yield' nuclear bomb for low altitude release (impact velocity of ~ 40 m/s). Hallquist at Lawrence Livermore National Laboratory (LLNL) in 1976. LS-DYNA originated from the 3D FEA program DYNA3D, developed by Dr. LS-DYNA is used by the automobile, aerospace, construction and civil engineering, military, manufacturing, and bioengineering industries. While the package continues to contain more and more possibilities for the calculation of many complex, real world problems, its origins and core-competency lie in highly nonlinear transient dynamic finite element analysis (FEA) using explicit time integration. LS-DYNA is an advanced general-purpose multiphysics simulation software package developed by the Livermore Software Technology Corporation (LSTC). Proprietarycommercial software (1978 DYNA3D Public domain software )
Screenshot from LS-PrePost showing the results of an LS-DYNA simulation of a Geo Metro impacting a rigid wall at 120 kilometres per hour (75 mph)Ĭomputer-aided engineering, Finite Element Analysis