Quick question, what test would be more representative of the load that is applied horizontally when the sample is standing on the test machine, for example when you break pasta in half by snapping it with both hands and making it break in the middle? would it be a tensile or a compressive strength test? Cheers!
I believe that the Flexural Strength Test (ASTM D790) may be more representative for the load you are describing. For the Flexural strength test, the sample is positioned horizontally, and a load is applied in the center. Essentially, you are measuring the ability for the material to flex in half and resist breakage. Thank you for your question.
Great video. Thank you. I was wondering if you sell the standard molds for sample preparation. If not, can you suggest to me where can I buy them? Thank you in advance.
Thank you for your compliment. Any testing that we conduct in-house are based on machined test samples from stock shapes. Our business is mostly dealing with formed shapes....rods, sheets, and tubes. Unfortunately, we don't sell the test sample molds, nor even really use them ourselves. I would think most any mold tool builder could make them for you.
ASTM D695 mentions the use of a compressometer to measure strain, but is it possible to attach it to the compression platens for thin specimens with the support jig? Ignoring the fact that a much more precise calculation would be using strain gauges
Thank you for the question! I am familiar with testing samples approximately 1/2" square x 1" long using an Instron machine. In this set-up, the strain is measured by a load cell and the movement/travel by the crosshead. So, I am unfamiliar with using a compressometer and can't really speak to how it could be used/attached to compression plattens. My suggestion would be to reach out to an equipment manufacturer like Instron, Tinius Olsen, etc. They may be able to better assist with your testing options for thin parts. Good luck!
Hello and thank you for your comment. Are you able to clarify your question for me? I am afraid that I don't fully understand. I'll then be happy to reply.
@@boedekerplastics Thankyou for your response sir ,Actually my question is about what are the factors affecting in this technique for example Higher the temperature lower the strength ,Moulded specimen shows better compressive strength than the specimen prepared by machining or lamination process.
I am Sherin Vedha from India (Tamilnadu).Iam studyinh MTECH Plastic technology In CENTRAL INSTITUTE OF PETROCHEMICAL ENGINEERING AND TECHNOLOGY. And also I request you to upload more videos related thermal, optical and electrical properties.That will be very helpful for my studying purpose.
Thank you for the clarification. Yes, temperature will certainly affect the strength of the material. As temperature increases, a polymer material will tend to lose strength. And certainly as the temperature exceeds the material's glass transition (Tg) a significant reduction in strength will start to occur. I have not done a video on Tg yet....but this is the temperature at which the amorphous bonds of the polymer structure start to release and slide. Watch our videos on DMA and Heat Deflection Temperature. There are other factors which can also affect a materials strength including moisture absorption (if large enough), Strain rate (rate of applied load), and time under load (CREEP).
Thank you for your interest in Boedeker's TECH Talk series on plastics. We are always looking for our next topic. I will be sure to add some future topics related to thermal, optical, and electrical properties. Good luck with your on-going studies!
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Good technical video. Thank you (Bambpoly Green Technology Corp)
Thanks Ronald!
Great video, greattings from Costa Rica
Thanks for watching!
Quick question, what test would be more representative of the load that is applied horizontally when the sample is standing on the test machine, for example when you break pasta in half by snapping it with both hands and making it break in the middle? would it be a tensile or a compressive strength test?
Cheers!
I believe that the Flexural Strength Test (ASTM D790) may be more representative for the load you are describing. For the Flexural strength test, the sample is positioned horizontally, and a load is applied in the center. Essentially, you are measuring the ability for the material to flex in half and resist breakage. Thank you for your question.
Great video. Thank you. I was wondering if you sell the standard molds for sample preparation. If not, can you suggest to me where can I buy them? Thank you in advance.
Thank you for your compliment. Any testing that we conduct in-house are based on machined test samples from stock shapes. Our business is mostly dealing with formed shapes....rods, sheets, and tubes. Unfortunately, we don't sell the test sample molds, nor even really use them ourselves. I would think most any mold tool builder could make them for you.
ASTM D695 mentions the use of a compressometer to measure strain, but is it possible to attach it to the compression platens for thin specimens with the support jig? Ignoring the fact that a much more precise calculation would be using strain gauges
Thank you for the question! I am familiar with testing samples approximately 1/2" square x 1" long using an Instron machine. In this set-up, the strain is measured by a load cell and the movement/travel by the crosshead. So, I am unfamiliar with using a compressometer and can't really speak to how it could be used/attached to compression plattens. My suggestion would be to reach out to an equipment manufacturer like Instron, Tinius Olsen, etc. They may be able to better assist with your testing options for thin parts. Good luck!
What are the factors affecting in this method
Hello and thank you for your comment. Are you able to clarify your question for me? I am afraid that I don't fully understand. I'll then be happy to reply.
@@boedekerplastics Thankyou for your response sir ,Actually my question is about what are the factors affecting in this technique for example Higher the temperature lower the strength ,Moulded specimen shows better compressive strength than the specimen prepared by machining or lamination process.
I am Sherin Vedha from India (Tamilnadu).Iam studyinh MTECH Plastic technology In CENTRAL INSTITUTE OF PETROCHEMICAL ENGINEERING AND TECHNOLOGY. And also I request you to upload more videos related thermal, optical and electrical properties.That will be very helpful for my studying purpose.
Thank you for the clarification. Yes, temperature will certainly affect the strength of the material. As temperature increases, a polymer material will tend to lose strength. And certainly as the temperature exceeds the material's glass transition (Tg) a significant reduction in strength will start to occur. I have not done a video on Tg yet....but this is the temperature at which the amorphous bonds of the polymer structure start to release and slide. Watch our videos on DMA and Heat Deflection Temperature. There are other factors which can also affect a materials strength including moisture absorption (if large enough), Strain rate (rate of applied load), and time under load (CREEP).
Thank you for your interest in Boedeker's TECH Talk series on plastics. We are always looking for our next topic. I will be sure to add some future topics related to thermal, optical, and electrical properties. Good luck with your on-going studies!
I like ittttt thanks
I'm glad you like it