汽车车身用自穿刺铆接接头疲劳分析数据

通过分析铆点处的等效应力，构建了具有普适性的铝合金自穿刺铆接接头疲劳寿命预测模型，该模型可根据铝板厚度、铆钉直径等输入参数，快速计算出铆点的疲劳寿命，用于汽车白车身铆接结构耐久性设计和评估。（1）数据采集：设计铝合金自穿刺铆接样品几何尺寸，以及疲劳试试验测试方法（载荷控制常幅疲劳试验，最大载荷、载荷比均为可变参数），利用MTS疲劳试验机开展疲劳试验采集原始数据。
（2）数据处理：将采集到的疲劳数据进行进一步分析，首先根据试验载荷计算得到施加在铆点处的等效应力，计算公式为：等效应力=K*（(最大疲劳载荷/100)^2-最大疲劳载荷*疲劳载荷比/100)^2），其中常数K为拟合曲线常数，该样例数据中K为0.0842850192792407；再利用试验数据和等效应力得到疲劳寿命预测模型y=Ax^B,常数A和B与测试样品的结构相关。
（3）应用场景：铝合金自穿刺铆接是轻量化汽车最常采用的连接技术之一，其疲劳寿命预测是白车身耐久性设计和评价的必备工具。通过疲劳试验获得具有不同板厚匹配、铆钉直径、几何构型的样品疲劳数据，辅助以疲劳失效分析、有限元计算等分析手段，构建了具有普适性的铝合金自穿刺铆接接头疲劳寿命预测模型，该模型可根据铝板厚度、铆钉直径等输入参数，快速计算出铆点的疲劳寿命，用于汽车白车身铆接结构耐久性设计和评估。

A universal fatigue life prediction model for aluminum alloy self-piercing riveting (SPR) joints was constructed by analyzing the equivalent stress at the riveted point. This model can quickly calculate the fatigue life of the riveted point based on input parameters such as aluminum sheet thickness and rivet diameter, and is used for durability design and evaluation of riveted structures in automotive body-in-white (BIW).

(1) Data Collection: The geometric dimensions of aluminum alloy SPR specimens and the fatigue test method (load-controlled constant-amplitude fatigue test, with maximum load and load ratio as variable parameters) were designed. Raw data were collected by conducting fatigue tests using an MTS fatigue testing machine.

(2) Data Processing: The collected fatigue data were further analyzed. First, the equivalent stress applied at the riveted point was calculated based on the test load, using the formula: Equivalent Stress = K * [(Maximum Fatigue Load / 100)^2 - (Maximum Fatigue Load * Load Ratio / 100)^2]. The constant K is a fitting curve constant, with a value of 0.0842850192792407 in this sample dataset. Then, the fatigue life prediction model y=Ax^B was established using the test data and equivalent stress, where the constants A and B are related to the structure of the tested specimens.

(3) Application Scenarios: Aluminum alloy SPR is one of the most commonly used joining technologies for lightweight automobiles, and its fatigue life prediction is an essential tool for durability design and evaluation of BIW. Fatigue data of specimens with different sheet thickness matches, rivet diameters and geometric configurations were obtained through fatigue tests. Combined with analysis methods such as fatigue failure analysis and finite element calculation, the aforementioned universal fatigue life prediction model for aluminum alloy SPR joints was constructed. This model can quickly calculate the fatigue life of the riveted point based on input parameters such as aluminum sheet thickness and rivet diameter, and is applied to the durability design and evaluation of riveted structures in automotive BIW.

搜集汇总

数据集介绍

特点

该数据集包含581条汽车车身自穿刺铆接接头的疲劳分析数据，详细记录了接头参数和疲劳测试结果，并构建了疲劳寿命预测模型，用于汽车白车身铆接结构的耐久性设计和评估。