v820spotsgmscformat.pptVIP

MSC/FATIGUE Spot Weld;大约50%的汽车结构耐久性问题都与点焊相关About 50% of automotive structural durability problems are associated with spot-welds 大约80%的汽车车身耐久性问题与点焊相关About 80% of automotive body durability problems are associated with spot-welds 在汽车生产线上增加一个点焊设备的成本将近3万美元The tooling cost for 1 spot weld on an automated production line is about $30,000 后期的增加其费用将近2倍Late additions may cost twice this amount 除结构方面的重要性之外，点焊的耐久性问题也是影响产品感官质量的重要因数Besides any structural importance, the durability of spot welds can have an important effect on perceived quality;Current Practice;MSC/FATIGUE Spot Weld是MSC/FATIGUE软件包的可选模块之一，它基于MSC/NASTRAN的有限元分析，可预测两块金属板在点焊连接处的疲劳寿命。计算中将结构的点焊看作是连接两块金属板的刚性杆，而金属板用薄壳单元描述。该??法利用杆单元横截面所受的力和力矩来计算焊接处的应力，然后采用S-N方法，完成结构的全寿命疲劳分析。 ;基于结构应力Structural Stress Based Method; FE Model of Strut Tower;How do we Model Spotwelds?;Loading History on Damper;Structural Stress Calculations;E.G. stresses in sheet :;Fatigue Properties - Typical Test Specimen;Fatigue Properties - Generic S-N Curves;损伤计算流程Damage Calculation Procedure;Results Postprocessing Options;Fatigue Results for Shock Tower;Polar Plot of Damage;Example Problem:A Spot Weld Analysis;Solution Parameters Setup;Material Info Setup;Loading Info Setup;Display Results;虚拟应变片测量 MSC/FATIGUE Software Strain gauge;Software Strain Gauge;Description;相关性的应用Correlation Applications I;Correlation Applications II;Welded Structure Analysis I;Welded Structure Analysis I;Gauge Definition;Implementation;Example Problem: A Software Strain Gage;Software Strain Gage Setup;Loading Info Setup;Perform Analysis;Correlation Techniques;Exercise Perform Quickstart Guide Chapter 13 Exercise, “A Spot Weld Analysis” Perform Quickstart Guide Chapter 14 Exercise, “A Software Strain Gauge” Be sure to ask for help if there’s anything you don’t understand