Browse Publications Technical Papers 2020-01-1058

Vector Load Simplified Duty Cycle For Lower Control Arm 2020-01-1058

Multi-axial loaded parts like lower control arms are routinely tested in the laboratory for durability verification. But the full anticipated complex road load data is not normally applied because it would be too expensive to test all parts this way. Instead, a simplified loading condition is used. Ideally, this will be as simple as possible such as a single sine wave loading applied to one loading point and in one direction. The specification of which hard point to use, which loading direction, and which frequency, and load magnitude, require very good engineering judgement and a high degree of experience. Even then, it is unlikely that the optimum solution will be obtained and the risk of creating a non representative test is very high. Recently, a new technique has been developed which simultaneously derives both an optimum loading profile (surrogate load) and loading direction (vector direction) from full Proving Ground real loading conditions. This paper will present the technique and show results for a realistic LCA example.


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