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定价： 78元 / 折扣价： 67 元

定价： 605元 / 折扣价： 515 元 加购物车

定价： 345元 / 折扣价： 294 元 加购物车

定价： 975元 / 折扣价： 829 元 加购物车

定价： 78元 / 折扣价： 67 元 加购物车

定价： 345元 / 折扣价： 294 元 加购物车

定价： 975元 / 折扣价： 829 元 加购物车

5.1 This test method is designed to produce composite stiffener cross-section local buckling and crippling data for research and development, and for structural design and analysis. The standard generic configurations for this procedure provide data for two types of cross-section segments: one-edge-free and no-edge-free. This type of data is used in classical stiffener analysis methods. Compressive loading of composite column type specimens may exhibit one of four modes: (1) a compression material strength failure, (2) an overall column flexural, torsional, and or flexural-torsional instability, (3) a local instability followed by a continued post-buckled force carrying capability which eventually results in a material strength failure, or (4) a combination of local and overall instability followed by post-buckling failure. The first two modes are outside the scope of this test method. The latter two modes are categorized as crippling failure and is the purpose of this test method.5.1.1 The desired failure mode is characterized by an initial linear elastic structural deformation. Continued loading eventually renders one of the cross-sectional segments unstable. Additional loading beyond this point of initial buckling exhibits a pattern of local lateral deflections or buckles. These deflections will grow, and possibly change modes, until catastrophic column failure occurs. This failure is considered the ultimate crippling stress for the buckled segments.5.2 General factors that influence the mechanical response of composite laminates and should therefore be reported include the following: material, methods of material preparation and lay-up, specimen stacking sequence, specimen preparation, specimen conditioning, environment of testing, specimen alignment and gripping, speed of testing, time held at test temperature, void content, and volume percent reinforcement.1.1 This test method covers the local buckling and crippling stresses for one-edge-free and no-edge-free cross section configurations using solid laminate composite material construction. Design of test specimens is covered in Guide D8511/D8511M. A number of test parameters may be varied within the scope of the standard, provided that the parameters are fully documented in the test report. The composite material forms are limited to continuous-fiber or discontinuous-fiber (tape, fabric, braids or hybrids of these forms) reinforced composites.1.2 This test method requires careful specimen design, instrumentation, data measurement and data analysis. The use of this test method requires close coordination between the test requestor and the test lab personnel. Test requestors need to be familiar with Guide D8511/D8511M and CMH-17 Volume 3 Chapter 92 (1).1.3 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.1.3.1 Within the text the inch-pound units are shown in brackets.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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1.1 This guide covers designing local buckling and crippling test specimens to obtain empirical strength data for one-edge-free and no-edge-free cross section configurations using solid laminate composite material construction. This guide also discusses data analysis procedures for these test specimens. Test procedures for local buckling and crippling specimens are covered in Test Method D8510/D8510M. This guide is intended to be used by persons requesting these test types.1.2 Local buckling and crippling tests require careful specimen design, instrumentation, data measurement and data analysis. Test requestors designing these specimen need to be familiar with Test Method D8510/D8510M, CMH-17 Volume 3 Chapter 9 (1)2, and the stress analysis methods that will use the resulting local buckling and crippling design data.1.3 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.1.3.1 Within the text the inch-pound units are shown in brackets.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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6.1 Preparedness includes awareness and education for all community members that might be impacted by a hazardous materials accident, and creating expectations for the actions of all community members should an accident occur.6.1.1 The point of preparedness is to minimize the impact of a chemical accident through the actions of all community members, rather than the actions of only facility and response agencies. These actions, when coupled with accident prevention and consequence reduction strategies, reduce the potential for hazardous materials accidents and minimize the consequences of those that do occur.6.2 There is great potential benefit to facilities, communities, LEPCs and emergency responders in developing a common understanding of the chemical hazards and accident preparedness capabilities present in their communities. The common understanding can significantly minimize he consequences of hazardous chemical accidents (See NPFA 1600).6.3 Coordination and cooperation must fit into the process for improving community preparedness.6.3.1 Preparedness is based first on the community developing a broad awareness and understanding of the risks that are present, locally. Next comes a community-wide evaluation of which community members are most vulnerable to risks, the mechanisms or pathways of risks, and the existing capabilities to address those risks should an accident occur. The capabilities being evaluated include more than the ability of the first responders to take actions. It includes the capabilities of all community members to take appropriate actions.6.3.2 Since all communities have capability gaps when evaluated against the risks present in the community, the subsequent step is strategic planning to fill those capability gaps with prioritization for these efforts developed by the community members. Again, improved preparedness is the goal, not simply focusing on response capacity.6.3.3 Filling capability gaps requires the use of all the regulatory and social tools available to the community and its partners. All community members have a stake in accident prevention, consequence reduction and improving the collective ability to communicate and respond. Improvements are made through increased awareness, education, training, cooperative programs, and practice. Addressing the identified capability gaps can include a broad range of options such as accident prevention to creation of expectations for the actions of community members to be able to shelter, evacuate and provide aid to others. Stakeholder engagement is critical to successfully closing capability gaps.6.3.4 Accomplishing these tasks is a community-level activity. While it might be led by an emergency manager or local emergency planning committee, the key to successful preparedness planning is broad coordination and cooperation involving all community members.6.3.5 Facilities must be part of the preparedness effort because of their greater expertise on the properties of the hazardous chemicals present at their plants, knowledge of their operating systems and procedures, hazards assessments, their emergency plans, and emergency response capabilities.1.1 This guide covers new and anticipated state and federal regulatory programs that create an obligation to “coordinate and cooperate” on emergency preparedness planning between regulated facilities, local emergency planning committees (“LEPCs”) and emergency responders. The goal of this increased coordination and cooperation is to develop better community preparedness for potential accidents involving hazardous chemicals and hazardous waste. Currently, existing regulations do not adequately describe the expectations for the “coordinate and cooperate” process, that apply to each party working on emergency preparedness. This guide is intended to assist facilities, LEPCs, emergency responders, and other stakeholders in performing the coordinate and cooperate function at a community preparedness level.1.1.1 As the outcome of the “coordinate and cooperate” process is community driven, it would be extremely difficult to create these expectations in regulation. Without further guidance or standards, these obligations could easily be misconstrued or ignored. The absence of standards for “coordination and cooperation” potentially subjects facilities to enforcement for noncompliance and, more concerning, fails to inform LEPCs, emergency responders and community members generally so they can identify opportunities for better preparedness in their communities.1.1.2 Preparedness Planning versus Response—Emergency response activities are a specialized field involving programs of training, hazard awareness and specific types of equipment. Coordination and cooperation on emergency preparedness planning is not about emergency response. Instead, it is a whole-of-community process of awareness and education. The broad objective is that all community members ultimately understand the actions they should take to protect themselves, their families and property. All community members are stakeholders in the preparedness planning process and each community needs to think expansively when inviting participants to the process.1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

1 Scope This part of ISO 10993 specifies test methods for the assessment of the local effects of an implant material on living tissue, at both the macroscopic and microscopic level. The test specimen is implanted into a site and tissue appropriate f

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1.1 Scope For the purpose of compatible interconnection of data processing equipment via a local area network(LAN) using the token ring access method, this part of ISO/IEC 8802 a)Provides a general description of the token ring local area network (L

定价： 2366元 / 折扣价： 2012 元

Foreword to ISO/IEC 8802-5 : 1998/Amd. 1: 1998 This International Standard is part of a family of International Standards for Local and Metropolitan Area Networks. This family of International Standards deals with the Physical and Data Link layers a

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