Hi all,
I know this topic has come up more than once in the past. When onegets results from a study how does one weigh theoretical resultsagainst actual field conditions (without actually being able totest the part)? I understand that the study is only as accurate asthe data being fed into it. I usually try to keep the model asintact as possible to achieve the most accurate testing scenario,however performance is typically inversely proportional. One thingwe don't do is insert weld beads into the models. We run our studyswith global bonding for weldments as well as bolted joints as it isthe fastest study. Any guesses as to how much error is introducedwhen using bonded for a bolted joint rather than simulating thefasteners (I'm sure it's a case by case deal)? Then there is thehot-spot issue. Anyone have any first hand experience running astudy on weldments with and without the weld beads? The hardestpart about running FEA for me is determining how critical theindividual hot-spots are (second hardest is by far meshing). Willthe material yield in those high stress areas which will then allowthe stress to redistribute? Will a crack develop and propagate?Does the hot-spot actually exist? These are seemingly difficultquestions to answer.
I've attached some JPEGS of a typical model showing hot-spots. Theplot is Design Check (FOS) to Yield. The scale is 0-3. Anyone careto comment on this model regarding hot-spots? I'm certainly notexpecting someone to "ok" the design, just your thoughs based onyour experiences.
Thanks in advance!
AaronSolidworksSimulation
I know this topic has come up more than once in the past. When onegets results from a study how does one weigh theoretical resultsagainst actual field conditions (without actually being able totest the part)? I understand that the study is only as accurate asthe data being fed into it. I usually try to keep the model asintact as possible to achieve the most accurate testing scenario,however performance is typically inversely proportional. One thingwe don't do is insert weld beads into the models. We run our studyswith global bonding for weldments as well as bolted joints as it isthe fastest study. Any guesses as to how much error is introducedwhen using bonded for a bolted joint rather than simulating thefasteners (I'm sure it's a case by case deal)? Then there is thehot-spot issue. Anyone have any first hand experience running astudy on weldments with and without the weld beads? The hardestpart about running FEA for me is determining how critical theindividual hot-spots are (second hardest is by far meshing). Willthe material yield in those high stress areas which will then allowthe stress to redistribute? Will a crack develop and propagate?Does the hot-spot actually exist? These are seemingly difficultquestions to answer.
I've attached some JPEGS of a typical model showing hot-spots. Theplot is Design Check (FOS) to Yield. The scale is 0-3. Anyone careto comment on this model regarding hot-spots? I'm certainly notexpecting someone to "ok" the design, just your thoughs based onyour experiences.
Thanks in advance!
AaronSolidworksSimulation
