Recent content by Victor.wong

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    Stress in Beams - Same Force, Same Area, Different Lengths

    OK. may be a pic will explain more if you see the new attachment, my question is, why is the length of the block below the applied force affect the stress at the circled area. my thinking behind is, no matter how long the rod is below the force application. it should not affect the...
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    Stress in Beams - Same Force, Same Area, Different Lengths

    I know it is a very simple question. but FEA is telling me sth i don't expect. so ask this equation and see who can explain. first of all, stress only caused if a block of material is under 2 force. action force and reaction (the fixture). since the length under the point of force of action...
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    Stress in Beams - Same Force, Same Area, Different Lengths

    if you look at the attached photo. we have 2 beams, 1) is shorter, 2) is longer. cross-sectional area is the same. same force is applied X cm from the fixed end. what is the max stress in each case? why are they the same ( and why not)? Take gravity out of the equation. FEA shows...
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    Car Battery Problem: Can Reversing Polarity Harm My Car?

    yeah! it was a bit embarrassing! The story was that. The guy helping me was an idiot and he had an expensive car. But the **** thing was there was no color or indication on his battery. And he kept saying he had done it for so many times and he could remember the terminial. I didnt want to...
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    Car Battery Problem: Can Reversing Polarity Harm My Car?

    Car Battery Problem! Hi all, I have to tell my story before actully asking the question. So, please be a bit patient! I went overseas for a holiday for 3 weeks. Before I went, I washed my car. Unfortunately, I forgot to turn off my cabin light. Of course, I couldn't start up my car when I...
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