floatation material |
| 01-16 07:36:12 来源： 作者： |
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floatation material Inquiry (采购产品): floatation material Dear Sir or Madam, My name is Blair Fraser I am presently enrolled in engineering at Memorial University of Newfoundland in their Ocean and Naval Architecture program. I am presently gathering information on buoyancy/ floatation materials for a school paper. With the multitude of foam products on the market today I was wondering if it would be possible to answer some questions, as well as, acquire some product information to assist with this research? It should be noted that I am specifically looking at floatation for small pleasure craft construction (Under 6 m). I have found that most governing bodies only have a list of acceptable foam products (mostly polyurethane for example: http://www.tc.gc.ca/BoatingSafety/regs-stds/foam.htm). I would like to put together some criteria that could assist a manufacturer or home boat builder in choosing a comparable floatation material based on product information (material properties). Here we go! 1) For a new product or an existing one, what material properties or testing criteria do you use to categorize the product as either as structural core foam or a just floatation material? (Yield strength, adhesion, shear, et cetera) 2) Would it be possible to receive product information on materials that are representative of structural core foam, as well as, product information of a typical floatation material for comparison? 3) Before marketing a material, are you required to perform internal testing to meet certain standards at your company’s expense or is this up to regulatory bodies to perform these tests? (e.g. ASTM D-471) 4) When conducting tests on floatation materials, such as an impact test, after completion of testing are the losses in buoyancy due to testing recorded, as would be required, in a test such as the ASTM D-471 (e.g. less than 5% loss of volume) 5) Are there any tests, which involve cyclic impacts loads to model repetitive hull slamming which possibly could result in fatigue and material deterioration? 6) Are there any work hardening attributes associated with foam materials? If any of these questions violate confidentiality I would of course be willing to sign any weaver for use of information. As well, I understand these are rather vague question, if any clarification is required please do not hesitate to contact me. I appreciate any assistance in advance. Thank you, Blair Fraser Term VII ONAE Memorial University of Newfoundland **** Hidden Message ***** Blair Fraser NF m4m 2n2 CAN Company: Memorial University of Newfoundland Title: Mr. E-mail: fraser@engr.mun.ca **** Hidden Message ***** fraser@engr.mun.ca |
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