CN107688000A - Method, system and the cantilevered stripping off device of stripping type measure prepreg viscosity - Google Patents
Method, system and the cantilevered stripping off device of stripping type measure prepreg viscosity Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000012360 testing method Methods 0.000 claims abstract description 127
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- 238000005452 bending Methods 0.000 claims description 13
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Abstract
本发明公开了一种剥离式测定预浸料粘性的方法、系统及悬臂式剥离装置，属于材料物理性质测试技术领域。测定方法包括备料步骤、贴合步骤、剥离步骤及计算步骤；在备料步骤中通过在两个不同测试区域保留不同数量的背衬膜，从而制备出具有两段式差异性的预浸料试样；在剥离步骤中，基于剥离步骤中在两段上剥离力差异而量化地表征和测定预浸料的剥离力；在计算步骤中，通过分析和差值计算间接地测定用于表征预浸料的粘性和刚度物理量，方法简单、便于实现、易于控制，可广泛地应用于预浸料物理性质测试领域中。
The invention discloses a stripping method, system and cantilever stripping device for measuring the viscosity of prepreg, belonging to the technical field of material physical property testing. The measurement method includes a material preparation step, a bonding step, a peeling step and a calculation step; in the material preparation step, a prepreg sample with two-stage difference is prepared by retaining different amounts of backing film in two different test areas ; In the stripping step, quantitatively characterize and determine the peel force of the prepreg based on the difference in peel force on the two sections in the stripping step; The physical quantities of viscosity and stiffness are simple, easy to implement and easy to control, and can be widely used in the field of prepreg physical property testing.
Description
技术领域technical field
本发明涉及材料物理性质测试技术领域，具体地说，涉及一种测试预浸料粘性与刚度的方法及实施该方法对预浸料粘性与刚度进行测定的测定系统、悬臂式剥离装置。The invention relates to the technical field of material physical property testing, in particular to a method for testing the viscosity and stiffness of prepregs, a measuring system and a cantilever stripping device for implementing the method to measure the viscosity and stiffness of prepregs.
背景技术Background technique
预浸料粘性是指在较短的接触时间与接触压力下，预浸料与其他物件表面所形成一种不完全的粘结特性，其作为决定预浸料是否适合铺贴的关键因素。在复合材料铺放工艺中，要求预浸料在一个合理的粘性范围，当粘性不足时，容易产生滑移、架桥等铺放缺陷；而粘性过大时，则不利于铺层有误时调整重铺，也不利于预浸料与背衬纸剥离，且会给预浸料的输送带来困难。Prepreg viscosity refers to the incomplete bonding characteristics formed between prepreg and other object surfaces under short contact time and contact pressure, which is a key factor in determining whether prepreg is suitable for laying. In the composite material laying process, the prepreg is required to be within a reasonable viscosity range. When the viscosity is insufficient, it is easy to produce laying defects such as slippage and bridging; when the viscosity is too high, it is not conducive to the wrong layup. Adjusting the re-laying is also not conducive to the separation of the prepreg and the backing paper, and will bring difficulties to the transportation of the prepreg.
因此，准确地测定出用于表征预浸料粘性的物理量是提高复合材料铺放质量的前提之一，但由于缺乏准确有效且定量的测定方法，导致人们在描述预浸料的粘性时，通常为根据经验将其分成高、中、低三档，或者采用一些方法进行定性测量，比如：(1)滚球法：把规定尺寸和质量的塑料小球放在贴有预浸料的45°斜坡上，让小球向下滚动，通过滚动情况研究预浸料的粘性；(2)撕裂法：把两片预浸料贴合在一起，并施加压力，然后撕裂，以规定负荷下两片预浸料完全撕裂分离的时间作为表征其粘性的指标；(3)粘贴分离法等。Therefore, accurate determination of the physical quantity used to characterize the viscosity of prepreg is one of the prerequisites for improving the lay-up quality of composite materials. However, due to the lack of accurate, effective and quantitative measurement methods, people usually In order to divide it into three grades of high, medium and low based on experience, or use some methods for qualitative measurement, such as: (1) Rolling ball method: put a plastic ball of specified size and quality on a 45° On the slope, let the ball roll down, and study the viscosity of the prepreg through the rolling situation; (2) Tear method: put two pieces of prepreg together, apply pressure, and then tear, under the specified load The time for the two pieces of prepreg to be completely torn apart is used as an index to characterize their viscosity; (3) paste separation method, etc.
此外，由于预浸料本身特性所限，导致传统测量刚度的装置不适于测定预浸料的弯曲刚度。In addition, due to the limitation of the characteristics of the prepreg itself, the traditional stiffness measurement device is not suitable for measuring the bending stiffness of the prepreg.
发明内容Contents of the invention
本发明的目的是提供一种可定量且准确地测定表征预浸料粘性的物理量的剥离式测定方法；The purpose of the present invention is to provide a peel-off method that can quantitatively and accurately measure the physical quantity that characterizes the viscosity of the prepreg;
本发明的另一目的是提供一种用于实施上述测定方法的悬臂式剥离装置；Another object of the present invention is to provide a cantilever type peeling device for implementing the above assay method;
本发明的再一目的是提供一种以上述悬臂式剥离装置构建的剥离式测定预浸料粘性的系统。Another object of the present invention is to provide a peel-off system for measuring the viscosity of prepreg constructed with the above-mentioned cantilever peel-off device.
为了实现上述目的，本发明提供的剥离式预浸料粘性测定方法包括以下步骤：In order to achieve the above object, the peeling type prepreg viscosity determination method provided by the present invention comprises the following steps:
备料步骤，将N条并排布置的预浸料测试条的正面贴设于同张软膜上，沿测试条长度方向在测试区域内选取第一测试区域与第二测试区域，在第一测试区域内保留N1条预浸料的背衬膜，在第二测试区域内保留N2条预浸料的背衬膜，获取预浸料试样，其中，N≥2、N1≠N2、0≤N1＜N且0≤N2＜N；In the material preparation step, the fronts of N prepreg test strips arranged side by side are pasted on the same soft film, and the first test area and the second test area are selected in the test area along the length direction of the test strips. N 1 prepreg backing films are reserved in the second test area, and N 2 prepreg backing films are reserved in the second test area to obtain prepreg samples, where N≥2, N 1 ≠N 2 , 0≤N 1 <N and 0≤N 2 <N;
贴合步骤，对预浸料试样施加预定时长的预定压力，使其背面粘贴至测试模板上；Lamination step, applying a predetermined pressure on the prepreg sample for a predetermined time, so that the back side of it is pasted on the test template;
剥离步骤，对预浸料试样的一端施加剥离力P，将其从测试模板上剥离，获取剥离第一测试区域时的剥离力P1及第二测试区域时的剥离力P2；The peeling step is to apply a peeling force P to one end of the prepreg sample, peel it from the test template, and obtain the peeling force P 1 when peeling the first test area and the peeling force P 2 when peeling the second test area;
计算步骤，依据公式计算表征预浸料粘性的物理量，B为预浸料测试条的宽度。Calculation steps, according to the formula Calculate the physical quantity that characterizes the viscosity of the prepreg, and B is the width of the prepreg test strip.
由于在备料步骤中，在第一测试区域与第二测试区域内保留条数不等的背衬膜，从而在第一测试区域中剥离力包含N-N1条预浸料的粘性因素及N条预浸料的弯曲刚度因素，而在第二测试区域中剥离力包含N-N2条预浸料的粘性因素及N条预浸料的弯曲刚度因素，以利用两段中的剥离力P包含了与粘性因素差异性相关的差值，不仅能计算出用于表征预浸料粘性的物理量，且在计算过程中剔除了预浸料弯曲刚度对粘性测定的影响，使得测定结果更加准确。Since in the material preparation step, different numbers of backing films are reserved in the first test area and the second test area, the peeling force in the first test area includes the viscosity factor of NN 1 prepregs and the viscosity factor of N prepregs. The bending stiffness factor of the prepreg, and the peeling force in the second test area contains the stickiness factor of NN 2 prepregs and the bending stiffness factor of the N prepregs, so as to use the peeling force P in the two sections. The difference related to the factor difference can not only calculate the physical quantity used to characterize the viscosity of the prepreg, but also eliminate the influence of the bending stiffness of the prepreg on the viscosity measurement during the calculation process, making the measurement result more accurate.
具体的方案为在计算步骤中，依据公式或计算表征预浸料弯曲刚度的物理量。从而可准确的测定出用于表征预浸料弯曲刚度的物理量。The specific scheme is that in the calculation step, according to the formula or Calculate the physical quantity that characterizes the bending stiffness of the prepreg. Therefore, the physical quantity used to characterize the bending stiffness of the prepreg can be accurately determined.
另一个具体的方案为在第一测试区域与第二测试区域内，背衬膜关于预浸料试样的宽度方向上的对称线对称布置。从而确保预浸料试样的剥离端的受力均衡，进一步提高测试结果的准确性。Another specific solution is that in the first test area and the second test area, the backing film is arranged symmetrically with respect to the line of symmetry in the width direction of the prepreg sample. Thereby, the force balance of the stripped end of the prepreg sample is ensured, and the accuracy of the test result is further improved.
优选的方案为N2＝0。便于后续计算步骤的处理。The preferred solution is N 2 =0. Facilitate the processing of subsequent calculation steps.
另一个优选的方案为第一测试区域及第二测试区域的长度均为测试区域长度的一半。Another preferred solution is that the lengths of the first test area and the second test area are both half of the length of the test area.
为了实现上述另一目的，本发明提供的用于测定预浸料粘性的悬臂式剥离装置包括底座、牵拉机构、平衡机构及用于粘贴预浸料试样的测试模板，测试模板通过导轨滑块机构可滑动地安装在底座上，导轨滑块机构包括沿测试模板长度方向布置的直线导轨；牵拉机构包括可转动地固设在底座上的第一滑轮及跨绕在该第一滑轮上的牵引绳，第一滑轮位于直线导轨的一端侧，牵引绳的一端与测试模板的一端固定连接，另一端与悬臂杆固定连接且在剥离过程中的运动速度等于预浸料试样的剥离速度；平衡机构包括可转动地固设在底座上的第二滑轮及跨绕在第二滑轮上的悬挂绳，第二滑轮位于直线导轨的另一端侧，悬挂绳的一端与测试模板的另一端固定连接，另一端固定有平衡重物。In order to achieve the above-mentioned another purpose, the cantilever type peeling device for measuring the viscosity of prepregs provided by the present invention includes a base, a pulling mechanism, a balance mechanism and a test template for pasting prepreg samples, and the test template slides through the guide rail. The block mechanism is slidably installed on the base, and the guide rail slider mechanism includes a linear guide rail arranged along the length direction of the test template; the pulling mechanism includes a first pulley rotatably fixed on the base and straddling the first pulley The traction rope, the first pulley is located at one end of the linear guide rail, one end of the traction rope is fixedly connected to one end of the test template, the other end is fixedly connected to the cantilever rod and the moving speed during the peeling process is equal to the peeling speed of the prepreg sample The balance mechanism includes a second pulley rotatably fixed on the base and a suspension rope straddling the second pulley, the second pulley is located at the other end side of the linear guide rail, and one end of the suspension rope is fixed to the other end of the test template connected, and the other end is fixed with a balance weight.
在测定过程中，将该剥离装置安装在万能试验机上，并将悬臂杆固定在万能试验机上升机构上，且将预浸料试样的剥离端固定在万能实验机的夹头上；在剥离测试过程中，通过悬臂杆拉动测试模板与预浸料试样剥离端等速移动。稳定重物对测试模板的运动施加一个稳定阻力，这个阻力能够消除测试模板在牵引绳牵引下运动的速率突变和波动，起到阻尼器的作用，有效地确保测试结果的准确性。During the measurement, the stripping device was installed on the universal testing machine, and the cantilever rod was fixed on the lifting mechanism of the universal testing machine, and the stripped end of the prepreg sample was fixed on the chuck of the universal testing machine; During the test, the test template and the stripped end of the prepreg sample are moved at the same speed by pulling the cantilever rod. The stable weight exerts a stable resistance on the movement of the test template, which can eliminate the sudden change and fluctuation of the test template's movement rate under the traction rope, and acts as a damper to effectively ensure the accuracy of the test results.
具体的方案为测试模板包括用于粘贴预浸料试样的可拆模板及固定在导轨滑块机构的滑块上的托板，可拆模板可拆卸地安装在托板上。便于测试过程中粘贴预浸料试样。The specific solution is that the test template includes a detachable template for pasting prepreg samples and a supporting plate fixed on the slider of the guide rail slider mechanism, and the detachable template is detachably installed on the supporting plate. Facilitate the sticking of prepreg samples during testing.
另一个具体的方案为在测试模板上设有用于对预浸料试样进行加热并保温的硅加热片。以提供预浸料粘性和刚度测定实验所需的稳定温度区间，以满足研究多种工艺参数下对预浸料粘性和刚度的研究。Another specific scheme is that a silicon heating sheet for heating and keeping warm the prepreg sample is provided on the test template. In order to provide the stable temperature range required for the prepreg viscosity and stiffness determination experiment, to meet the research on the prepreg viscosity and stiffness under various process parameters.
优选的方案为沿牵引绳在剥离过程中的行进方向，上游绳段沿平行于测试模板的板面布置，下游绳段沿平行于已剥离的预浸料试样段的方向布置。有效地确保测试模板的运动速度与预浸料试样的剥离速度相等。The preferred scheme is that along the traveling direction of the traction rope during the stripping process, the upstream rope segment is arranged parallel to the plate surface of the test template, and the downstream rope segment is arranged parallel to the stripped prepreg sample section. Effectively ensuring that the speed of motion of the test template is equal to the speed of peeling of the prepreg specimen.
为了实现上述另一目的，本发明提供剥离式测定预浸料粘性的系统包括万能试验机及搭载在所述万能试验机上的剥离装置，剥离装置上述任一技术方案所描述的悬臂式剥离装置；剥离装置的底座固定在万能试验机的支座上，直线导轨沿水平方向布置，预浸料试样的剥离端夹持在万能试验机的夹头上，悬臂杆固定在万能试验机的上升机构上且使跨绕过第一滑轮的牵引绳段沿垂向布置。In order to achieve the above another purpose, the present invention provides a peel-off system for measuring the viscosity of prepregs, including a universal testing machine and a peeling device mounted on the universal testing machine. The peeling device is a cantilever-type peeling device described in any of the above technical solutions; The base of the stripping device is fixed on the support of the universal testing machine, the linear guide rail is arranged along the horizontal direction, the stripped end of the prepreg sample is clamped on the chuck of the universal testing machine, and the cantilever rod is fixed on the lifting mechanism of the universal testing machine and make the traction rope segment that straddles the first pulley be vertically arranged.
附图说明Description of drawings
图1为本发明实施例中剥离式测定预浸料粘性的系统处于测试状态下的结构示意图；Fig. 1 is a schematic structural diagram of a system for measuring the viscosity of a prepreg by peeling in an embodiment of the present invention in a test state;
图2为本发明实施例中悬臂式剥离装置处于测试状态下的结构示意图；Fig. 2 is a schematic structural view of the cantilever type peeling device in the test state in the embodiment of the present invention;
图3为本发明实施例中悬臂式剥离装置处于测试状态下的主视示意图；Fig. 3 is a schematic front view of the cantilever peeling device in the test state in the embodiment of the present invention;
图4为本发明实施例中剥离式测定预浸料粘性的方法的工作流程图；Fig. 4 is the working flow diagram of the method for peeling off the viscosity of prepreg in the embodiment of the present invention;
图5为本发明实施例中预浸料试样的背面结构示意图；Fig. 5 is a schematic diagram of the back structure of the prepreg sample in the embodiment of the present invention;
图6为本发明实施例中预浸料试样的正面结构示意图。Fig. 6 is a schematic view of the front structure of the prepreg sample in the embodiment of the present invention.
具体实施方式detailed description
以下结合实施例及其附图对本发明作进一步的说明。The present invention will be further described below in conjunction with the embodiments and accompanying drawings.
实施例Example
参见图1至图3，本发明剥离式测定预浸料粘性的系统包括万能试验机1及搭载在该万能试验机1上的悬臂式剥离装置2，悬臂式剥离装置2包括底座、测试模板5、牵引机构、平衡机构及硅加热片6。Referring to Fig. 1 to Fig. 3, the peel-off system for measuring prepreg viscosity of the present invention includes a universal testing machine 1 and a cantilever-type peeling device 2 mounted on the universal testing machine 1, and the cantilever-type peeling device 2 includes a base and a test template 5 , traction mechanism, balance mechanism and silicon heating sheet 6.
底座包括固定在万能试验机1的支座10上的安装盘20及固设在安装盘20上的导轨托盘21；测试模板5包括托板51及可拆卸地固定在托板51上的可拆模板52；硅加热片6包括加热片本体61、电源线62及温度传感器63，从而可对加热过程温度进行控制，该硅加热片6安装在可拆模板52与托板51之间，以对粘贴在可拆模板52上的预浸料试样4进行加热及保温在测定实验所需温度区间内；托板51下端固设有多个可滑动地安装在两条直线导轨31上的滑块32，两条直线导轨31相平行且沿测试模板5的长度方向布置，从而使托板51通过导轨滑块机构3而可滑动地安装在底座上。The base includes a mounting plate 20 fixed on the support 10 of the universal testing machine 1 and a guide rail tray 21 fixed on the mounting plate 20; Template 52; silicon heating sheet 6 includes heating sheet body 61, power cord 62 and temperature sensor 63, thereby can control the temperature of heating process, this silicon heating sheet 6 is installed between detachable template 52 and supporting plate 51, to The prepreg sample 4 pasted on the detachable template 52 is heated and kept warm within the temperature range required for the measurement experiment; the lower end of the supporting plate 51 is fixed with a plurality of sliders slidably installed on two linear guide rails 31 32 , two linear guide rails 31 are parallel and arranged along the length direction of the test template 5 , so that the pallet 51 is slidably mounted on the base through the guide rail slider mechanism 3 .
牵引机构包括牵引绳24、悬臂杆25及第一滑轮22，第一滑轮22可转动地安装在滑轮支架23上，滑轮支架23固设在导轨托盘21上且位于直线导轨31的一端侧的位置处；牵引绳24的一端固定在托板51的一端上，另一端跨绕过第一滑轮22后而固定在悬臂杆25上。悬臂杆25固设在万能试验机1的上升机构12上，在上升机构12与夹头14之间连接有用于用于测试上升拉力的100N传感器13。The traction mechanism comprises a traction rope 24, a cantilever rod 25 and a first pulley 22. The first pulley 22 is rotatably mounted on a pulley bracket 23. The pulley bracket 23 is fixed on the guide rail tray 21 and is positioned at one end side of the linear guide rail 31. One end of the traction rope 24 is fixed on one end of the supporting plate 51, and the other end is fixed on the cantilever rod 25 after passing around the first pulley 22. The cantilever rod 25 is fixed on the lifting mechanism 12 of the universal testing machine 1 , and a 100N sensor 13 for testing the lifting force is connected between the lifting mechanism 12 and the chuck 14 .
平衡机构包括第二滑轮27、平衡重物28及跨绕在第二滑轮27上的悬挂绳29，第二滑轮27可转动地安装在滑轮支架26上，滑轮支架26固设在导轨托盘21上且位于直线导轨31的另一端侧的位置处；悬挂绳29的一端固定在托板51的另一端上，平衡重物28固定在悬挂绳29的另一端上。The balance mechanism includes a second pulley 27, a balance weight 28 and a suspension rope 29 straddling the second pulley 27. The second pulley 27 is rotatably mounted on the pulley bracket 26, and the pulley bracket 26 is fixed on the guide rail tray 21. And be positioned at the position of the other end side of linear guide rail 31;
在测试过程中，直线导轨31沿水平方向布置，即测试模板5可沿水平方向滑动；沿牵引绳24在测试过程中的行进方向，其上游绳段沿平行于测试模板5的方向布置，即沿水平方向布置，而下游绳段沿垂向布置；预浸料试样4的剥离段夹持在万能试验机1的夹头14上，且在剥离过程中，牵引绳24的下游绳段沿平行于已剥离的预浸料试样段的方向布置，从而使牵引绳24的前行速度与预浸料试样4的剥离速度相等，即测试模板5沿直线导轨31的滑动速度等于预浸料试样4的剥离速度。During the test, the linear guide rail 31 is arranged in the horizontal direction, that is, the test template 5 can slide along the horizontal direction; along the direction of travel of the traction rope 24 in the test process, its upstream rope segment is arranged in a direction parallel to the test template 5, that is, Arranged along the horizontal direction, while the downstream rope section is arranged vertically; the peeled section of the prepreg sample 4 is clamped on the chuck 14 of the universal testing machine 1, and during the stripping process, the downstream rope section of the traction rope 24 is along the Arranged parallel to the direction of the peeled prepreg sample section, so that the forward speed of the traction rope 24 is equal to the peeling speed of the prepreg sample 4, that is, the sliding speed of the test template 5 along the linear guide rail 31 is equal to that of the prepreg sample. The peeling speed of material sample 4.
参见图4，使用上述测定系统对预浸料的粘性与弯曲刚度进行测定的方法包括备料步骤S1、贴合步骤S2、剥离步骤S3及计算步骤S4：Referring to Figure 4, the method for measuring the viscosity and bending stiffness of prepregs using the above-mentioned measurement system includes a material preparation step S1, a bonding step S2, a peeling step S3 and a calculation step S4:
备料步骤S1，将N条并排布置的预浸料测试条的正面贴设于同张软膜上，沿测试条长度方向在测试区域内选取第一测试区域与第二测试区域，在第一测试区域内保留N1条预浸料的背衬膜，在第二测试区域内保留N2条预浸料的背衬膜，获取预浸料试样，其中，N≥2、N1≠N2、0≤N1＜N且0≤N2＜N。In the material preparation step S1, the fronts of N prepreg test strips arranged side by side are pasted on the same soft film, and the first test area and the second test area are selected in the test area along the length direction of the test strips. Keep N 1 prepreg backing film in the area, keep N 2 prepreg backing films in the second test area, and obtain prepreg samples, where N≥2, N 1 ≠N 2 , 0≤N 1 <N and 0≤N 2 <N.
在本实施例中，制备预浸料试样4的过程为，如图5及图6所示，将4条碳纤维预浸料测试条41、42、43及44的正面贴设在同张软膜47，该四条样条的长度均为2L+M，宽度均为B，对于软膜47尽量选择弯曲刚度小的软膜，以减少其对预浸料弯曲刚度测定结果的影响；由于将所有测试条正面贴设在同一软模47上，可有效地确保四条测试条同步剥离。In this embodiment, the process of preparing the prepreg sample 4 is, as shown in Fig. 5 and Fig. 6, the fronts of the 4 carbon fiber prepreg test strips 41, 42, 43 and 44 are pasted on the same soft sheet. For the film 47, the lengths of the four splines are all 2L+M, and the width is B. For the soft film 47, try to choose a soft film with a small bending stiffness to reduce its influence on the measurement results of the bending stiffness of the prepreg; The front side of the test strips is pasted on the same soft mold 47, which can effectively ensure that the four test strips are peeled off synchronously.
如图2、图5及图6所示，测试条前端部402用于剥离过程中夹持在万能试验机1的夹头14上，其长度为M，并将测试区域401划分成第一测试区域403与第二测试区域404，该两个测试区域的长度均为L，即为测试区域401长度的一半。As shown in Fig. 2, Fig. 5 and Fig. 6, the front end portion 402 of the test strip is used to be clamped on the chuck 14 of the universal testing machine 1 during the stripping process, its length is M, and the test area 401 is divided into the first test The length of the area 403 and the second testing area 404 is L, which is half of the length of the testing area 401 .
保留预浸料测试条42、43在第一测试区域内的背衬膜45、46，撕掉其他背衬膜，在本实施例中，保留下来的背衬膜45、46关于预浸料试样4的宽度方向上的对称线40对称布置。Keep the backing films 45, 46 of the prepreg test strips 42, 43 in the first test area, and tear off the other backing films. In this embodiment, the remaining backing films 45, 46 are about the prepreg test area. The line of symmetry 40 in the width direction of sample 4 is arranged symmetrically.
贴合步骤S2，对预浸料试样4施加预定时长的预定压力，使其背面粘贴在测试模板5上。In the bonding step S2 , a predetermined pressure is applied to the prepreg sample 4 for a predetermined time, so that its back side is pasted on the test template 5 .
将可拆模板52从托板51上拆卸，并将预浸料试样4的背面对准可拆模板52背对托板51的表面，对预浸料试样4施加压力，以使其粘贴至可拆模板上，而保留有背衬膜的部分与测试模板5间没有粘贴力，因此在测试过程其剥离力不包含该部分粘性因素。Detach the detachable formwork 52 from the supporting plate 51, align the back of the prepreg sample 4 with the surface of the detachable formwork 52 facing away from the supporting plate 51, and apply pressure to the prepreg sample 4 to make it stick On the detachable template, there is no sticking force between the part that retains the backing film and the test template 5, so the peeling force does not include the stickiness factor of this part during the test.
剥离步骤S3，对预浸料试样4的一端施加剥离力P，将其从测试模5板上剥离，获取剥离第一测试区域403时的剥离力P1及第二测试区域404时的剥离力P2。Peeling step S3, applying a peeling force P to one end of the prepreg sample 4, peeling it from the test template 5, and obtaining the peeling force P1 when peeling the first test area 403 and the peeling force P1 when the second test area 404 is peeled off. Force P 2 .
将粘贴有预浸料试样4的可拆模板52安装至托板51上，并使用万能试验机1的夹头14夹住预浸料试样4的端部402。Install the detachable template 52 on which the prepreg sample 4 is pasted on the pallet 51 , and use the clamp 14 of the universal testing machine 1 to clamp the end 402 of the prepreg sample 4 .
启动万能试验机，将预浸料试样4从测试模板5上剥离下来，并记录剥离过程中的位移-力曲线，在该曲线中选取第一测试区域401与第二测试区域402所对应部分中的一稳定力点，即获取剥离力P1与剥离力P2。Start the universal testing machine, peel the prepreg sample 4 from the test template 5, and record the displacement-force curve during the peeling process, select the corresponding parts of the first test area 401 and the second test area 402 in the curve One of the stable force points, that is, to obtain the peeling force P 1 and the peeling force P 2 .
计算步骤S4，依据公式计算表征预浸料粘性的物理量，及依据公式或计算表征预浸料弯曲刚度的物理量，B为预浸料测试条的宽度。Calculation step S4, according to the formula Calculate the physical quantity that characterizes the viscosity of prepreg, and based on the formula or Calculate the physical quantity that characterizes the bending stiffness of the prepreg, and B is the width of the prepreg test strip.
以物理量F1、F2分别表征预浸料的粘性与弯曲刚度；则对于剥离力P1，有式1：NBF2+(N-N1)BF1＝P1；而对剥离力P2，有式2：NBF2+(N-N2)BF1＝P2。The physical quantities F 1 and F 2 are used to characterize the viscosity and bending stiffness of the prepreg respectively; for the peeling force P 1 , there is formula 1: NBF 2 +(NN 1 )BF 1 =P 1 ; and for the peeling force P 2 , there is Formula 2: NBF 2 +(NN 2 )BF 1 =P 2 .
联合式1与式2，可得或 Combining Equation 1 and Equation 2, we can get or
对于本实施例，由于N1＝2且N2＝0，可得或 For this embodiment, since N 1 =2 and N 2 =0, it can be obtained or
以计算出的物理量F1作为表征预浸料粘性，物理量F2作为表征预浸料的弯曲刚度，与现有技术中的定性描述相比，其具有以下优点： The calculated physical quantity F1 is used to represent the viscosity of the prepreg, and the physical quantity F2 is used to represent the bending stiffness of the prepreg. Compared with the qualitative description in the prior art, it has the following advantages:
本发明设计的基于测定预浸料粘性和刚度的移动悬臂剥离装置的测量方法，采用万能试验机100N力传感器测得对制备好的预浸料剥离过程中的力，在此基础上进行分析与差值计算，间接实现了针对预浸料的粘性定量化的测定，结果精确，方法简便易于实现，便于控制；且可间接实现了对预浸料的刚度的表征和测定，弥补了目前对预浸料的刚度测定装置以及方法的缺失。The measuring method of the mobile cantilever stripping device based on the determination of prepreg viscosity and rigidity designed by the present invention uses a universal testing machine 100N force sensor to measure the force in the process of stripping the prepared prepreg, and analyzes and analyzes on this basis The calculation of the difference indirectly realizes the quantitative determination of the viscosity of the prepreg, the result is accurate, the method is simple and easy to implement, and it is easy to control; it can also indirectly realize the characterization and measurement of the stiffness of the prepreg, making up for the current prepreg. The device and method for measuring the stiffness of impregnated materials are lacking.
上面结合附图对本发明的实施方式作了详细说明，但是本发明并不限于上述实施方式，在本领域普通技术人员所具备的知识范围内，还可以在不脱离本发明宗旨的前提下做出各种变化。The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and can also be made without departing from the gist of the present invention within the scope of knowledge possessed by those of ordinary skill in the art. Variations.
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