Wide ranges of soft materials are used in automotive engineering, particularly in the car interior or body sector. Most of these materials are leather, coated textiles or seals. Especially the seals are hollow chamber or lip seals, therefore very soft and are installed against various mating materials such as painted sheet metal, moulded plastic parts or glass. The movement and deformation of the vehicle can cause these materials to move relative to their mating materials. If unfavourable boundary conditions are present, stick-slip phenomena can occur and disturbing squeak and rattle noises are audible. The presented work contains a description of how stick-slip can be measured on soft elastic materials, what are the challenges by these and which influencing parameters have to be taken into account as well as how the concrete evaluation of the measurement curves has to be accomplished. As a result, dependencies of the relevant parameters like climate, forces and velocities are shown and the possibility of predicting stick-slip behaviour is thus improved. The inclusion of the algorithms in the consideration of the stick-slip risk generates a quality leap in the early phase of vehicle body development and thus in the avoidance of complaints and customer dissatisfaction.

错误:搜索内容不能为空,请输入英文关键词
错误:关键词超出字数限制,请精简
高级检索

Friction and Stick-Slip of Soft Materials – Challenge for Measurement and Prediction

  • Martin Strangfeld

摘要

Wide ranges of soft materials are used in automotive engineering, particularly in the car interior or body sector. Most of these materials are leather, coated textiles or seals. Especially the seals are hollow chamber or lip seals, therefore very soft and are installed against various mating materials such as painted sheet metal, moulded plastic parts or glass. The movement and deformation of the vehicle can cause these materials to move relative to their mating materials. If unfavourable boundary conditions are present, stick-slip phenomena can occur and disturbing squeak and rattle noises are audible. The presented work contains a description of how stick-slip can be measured on soft elastic materials, what are the challenges by these and which influencing parameters have to be taken into account as well as how the concrete evaluation of the measurement curves has to be accomplished. As a result, dependencies of the relevant parameters like climate, forces and velocities are shown and the possibility of predicting stick-slip behaviour is thus improved. The inclusion of the algorithms in the consideration of the stick-slip risk generates a quality leap in the early phase of vehicle body development and thus in the avoidance of complaints and customer dissatisfaction.