Crash worthiness using LS-Dyna

Ensuring quality of a product before its release is crucial in today’s world of value conscious customers. How robust a product is in different situations and how long its reliability lasts, is what defines the quality of a product. Such questions are answered by the preliminary tests that are conducted on the product. Many such tests including crash tests are conducted to validate a product in an automobile industry.

Crash tests shall amount the damages that occurs in case of a particular crash. Generally this tests are performed using a test car with full size anthropomorphic test devices that simulates the proportions, weight and articulation of the human body. This test objects are crashed at different speeds in different angles and the end results are noted.

To avoid the time and resources wasted in creating a real world test situation to test a automobile, simulation software’s are used. This gives an edge on real world testing as numerous iterations can be simulated and their corresponding results can be used to notice the weak points sooner and much accurately.

LS-DYNA is the software used to simulate real world physical effects of a developed product with many predefined models for crash worthiness analysis. There are around 5 lakh 3D solid elements such as, shells, beams, springs, dampers with nonlinear properties and a material library to support in choosing elasto-plastic, viscoplastic, composite forms of materials to create virtual subjects and materials. Arbitrary joints and hinges can also be defined in LS-DYNA to give flexibility to the materials.

LS-DYNA helps produce test results without actually destroying an automobile, and are tested on a computer, because of which the process is quick, inexpensively, and allows modification in the product design before actually going through manufacturing. The flexibility in this graphical representation facilitates designers to solve problems that are impossible with in actual crash test.