Problem of calculating allowable stress in SW6.
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As the title suggests, SW6 is commonly used for strength calculations in the design process. My colleagues all say that the margin of safety provided by the calculations using SW6 is sufficient, so there is no need to increase the safety factor further； There is a question: 1. For example, the allowable stress of S30408 at low temperatures is 137 Mpa; then does its strength remain unchanged at -10°C and -196°C? Why are the calculated values the same? 2. Also, it seems that 137 Mpa doesn’t have an additional safety factor.
. . . . There’s no change; go and check the value of 150. For low temperatures, it’s necessary to use a value of 20 degrees based on profits, and this has nothing to do with the software at all
Anyone who has read GB150 carefully would not ask such a question.
The tables in GB150 specify the design temperature
It’s fine to use an allowable stress of 137 Mpa; this is how we usually determine such values in our calculations； But have you ever thought about whether operating conditions at 20°C are the same as those at -196°C? I’m asking questions about the actual operating conditions! I hope everyone can think about it and analyze it carefully!
It’s fine to use an allowable stress of 137 Mpa; this is how we usually determine such values in our calculations； But have you ever thought about whether operating conditions at 20°C are the same as those at -196°C? I’m asking questions about the actual operating conditions! I hope everyone can think about it and analyze it carefully!
It’s fine to use an allowable stress of 137 Mpa; this is how we usually determine such values in our calculations； But have you ever thought about whether operating conditions at 20°C are the same as those at -196°C? I’m asking questions about the actual operating conditions! I hope everyone can think about it and analyze it carefully! There’s another issue that no one has discussed, and that is whether a safety factor has been applied to this allowable stress of 137 MPa; I really didn’t pay any attention to that! This topic came up during casual chatting with a colleague!
It’s fine to use an allowable stress of 137 Mpa; this is how we usually determine such values in our calculations； But have you ever thought about whether operating conditions at 20°C are the same as those at -196°C? I’m asking questions about the actual operating conditions! I hope everyone can think about it and analyze it carefully!
It’s fine to use an allowable stress of 137 Mpa; this is how we usually determine such values in our calculations； But have you ever thought about whether operating conditions at 20°C are the same as those at -196°C? I’m asking questions about the actual operating conditions! I hope everyone can think about it and analyze it carefully! There’s another issue that no one has discussed, and that is whether a safety factor has been applied to this allowable stress of 137 MPa; I really didn’t pay any attention to that! This topic came up during casual chatting with a colleague!