The estimation of the quantitative parameters of the accelerated test mainly includes the estimation of the stress level of the accelerated test, the estimation of the accelerated test time and the estimation of the acceleration factor. This test mainly considers the accelerated test scheme under the condition of two failure mechanisms of wire harness material fatigue and material aging. The accelerated wire harness fatigue failure adopts the wire harness fatigue endurance test device, and the three-axis movement displacement range of the wire harness is set to ±12 mm, and the frequency is 1 Hz. , that is, the time for three axes to move at the same time is 1 s, the test time is set to 105 s, and the accelerated wiring harness aging failure is realized by using a thermostat, the set temperature is 125 °C, and the time is set to 1 000 h.
Another key technical detail of accelerated test design is the failure criterion and failure detection method of the product. Product failure criteria and failure detection methods not only affect the accelerated test results, but also affect the final product reliability evaluation results. Therefore, product failure criteria and failure detection methods are important links in accelerated test design.